|
I ended up with both HP 9122C and 9122D (dual floppy drive) units. Both are recognized by my 8753 network analyzer (up to the point that setting incorrect GPIB address and setting incorrect disc/volume number has the expected error message results), all four drives make familiar sounds during power-up and normal operation, however, only one of the drives (in the 9122C) can read a diskette (list files on the media), and none can write or initialize diskettes. I am uncertain whether the onboard controllers are fully functional, but both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy drive) be adapted for use in either of these units? The 9122C uses a single (0.05" pitch) ribbon cable between the drives and the controller board; the 9122D has a somewhat narrower (0.05" pitch) ribbon cable and a 4-pin power connector. None of the connectors are identical to those used in contemporary floppy drives. I haven't looked for/at service documentation (yet). My last exposure to floppy drive equipment (at engineering, hardware and firmware level) was in the mid-late 1970s (!), so I'd not be adverse to a modest engineering project if there's a sign that this sort of thing has been successfully attempted in the past.
My other question - do you happen to have any drives (of either type) you'd be willing to part with?
Thanks,
Dave
|
With a little work certain 1.44 drives can be made to work in a 9122C the usual stumbling block is the controller in the 9122 wants to see the ready signal, but I did manage to make a couple drives work, but don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600 RPM and unlike most other 3.5 diskette drives.? There where two versions of drives used. The earlier models used a full high drive with a square eject button on the bottom right of the drive, about the only place you can get replacements for this drive is from other 9122S/D units or there where also a couple disk/ diskette combo units that used these drives.? The newer version is a half high drive with a rectangular eject button at the bottom right, this drive was used in a lot of HP equipment so replacements are easier to find.? One of the prevalent problems with these drives and especially the full high versions is lubricants used on the load/eject mechanism dry and becomes gummy and the diskettes do not load or eject properly and it is dangerous because the upper head may not retract properly and if you pull out the diskette when it is like this the upper head will come out with it.? I would strongly recommend you open the units and do a general inspect, clean and lube.
Paul.
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Show quoted text
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote: I ended up with both HP 9122C and 9122D (dual floppy drive) units. Both are recognized by my 8753 network analyzer (up to the point that setting incorrect GPIB address and setting incorrect disc/volume number has the expected error message results), all four drives make familiar sounds during power-up and normal operation, however, only one of the drives (in the 9122C) can read a diskette (list files on the media), and none can write or initialize diskettes. I am uncertain whether the onboard controllers are fully functional, but both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy drive) be adapted for use in either of these units? The 9122C uses a single (0.05" pitch) ribbon cable between the drives and the controller board; the 9122D has a somewhat narrower (0.05" pitch) ribbon cable and a 4-pin power connector. None of the connectors are identical to those used in contemporary floppy drives. I haven't looked for/at service documentation (yet). My last exposure to floppy drive equipment (at engineering, hardware and firmware level) was in the mid-late 1970s (!), so I'd not be adverse to a modest engineering project if there's a sign that this sort of thing has been successfully attempted in the past.
My other question - do you happen to have any drives (of either type) you'd be willing to part with?
Thanks,
Dave
|
I have the combo floppy and hard drive. Worked fine with my 8753D last I checked. It is heavy though where are you located? send reply directly if you can mycall@...
73 Eugene W2HX
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of David Feldman via Groups.Io Sent: Tuesday, October 30, 2018 6:39 PM To: [email protected]Subject: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive? I ended up with both HP 9122C and 9122D (dual floppy drive) units. Both are recognized by my 8753 network analyzer (up to the point that setting incorrect GPIB address and setting incorrect disc/volume number has the expected error message results), all four drives make familiar sounds during power-up and normal operation, however, only one of the drives (in the 9122C) can read a diskette (list files on the media), and none can write or initialize diskettes. I am uncertain whether the onboard controllers are fully functional, but both appear complete and physically undamaged. My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy drive) be adapted for use in either of these units? The 9122C uses a single (0.05" pitch) ribbon cable between the drives and the controller board; the 9122D has a somewhat narrower (0.05" pitch) ribbon cable and a 4-pin power connector. None of the connectors are identical to those used in contemporary floppy drives. I haven't looked for/at service documentation (yet). My last exposure to floppy drive equipment (at engineering, hardware and firmware level) was in the mid-late 1970s (!), so I'd not be adverse to a modest engineering project if there's a sign that this sort of thing has been successfully attempted in the past. My other question - do you happen to have any drives (of either type) you'd be willing to part with? Thanks, Dave
|
Further to my previous comments the two drive I modified to work on a 9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One thing you may encounter there are later versions of both of these drives that have less configuration options and will not be suitable.? On the YE Data drive I had to put a wire jumper on the board to get all the signals out that are required, I believe I may have had to do that with the Panasonic drive as well.? I happened to have several 1.44 diskette drives handy to experiment with.? You will probably have better luck with older drives, it seems a lot of the more recent ones are tailored for PC and have little in the way on configuration options.? The HP drives also have the power integrated into the signal cable so I made up a little interposer to go between the cable and the drive to break out the power and also to remap some of the pins.
The service guide for the 9122C can be found at and it contains a pinout of the drive cable connector which can help guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to, it may be that it is trying to format the diskettes at 256 bytes / sector and if the diskettes have been formatted differently before it may take a few tries before it is successful, bulk erasing the diskette first can be helpful for this.
Paul.
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On 2018-10-30 7:52 PM, Paul Berger wrote: With a little work certain 1.44 drives can be made to work in a 9122C the usual stumbling block is the controller in the 9122 wants to see the ready signal, but I did manage to make a couple drives work, but don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600 RPM and unlike most other 3.5 diskette drives.? There where two versions of drives used. The earlier models used a full high drive with a square eject button on the bottom right of the drive, about the only place you can get replacements for this drive is from other 9122S/D units or there where also a couple disk/ diskette combo units that used these drives.? The newer version is a half high drive with a rectangular eject button at the bottom right, this drive was used in a lot of HP equipment so replacements are easier to find.? One of the prevalent problems with these drives and especially the full high versions is lubricants used on the load/eject mechanism dry and becomes gummy and the diskettes do not load or eject properly and it is dangerous because the upper head may not retract properly and if you pull out the diskette when it is like this the upper head will come out with it.? I would strongly recommend you open the units and do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units. Both are recognized by my 8753 network analyzer (up to the point that setting incorrect GPIB address and setting incorrect disc/volume number has the expected error message results), all four drives make familiar sounds during power-up and normal operation, however, only one of the drives (in the 9122C) can read a diskette (list files on the media), and none can write or initialize diskettes. I am uncertain whether the onboard controllers are fully functional, but both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy drive) be adapted for use in either of these units? The 9122C uses a single (0.05" pitch) ribbon cable between the drives and the controller board; the 9122D has a somewhat narrower (0.05" pitch) ribbon cable and a 4-pin power connector. None of the connectors are identical to those used in contemporary floppy drives. I haven't looked for/at service documentation (yet). My last exposure to floppy drive equipment (at engineering, hardware and firmware level) was in the mid-late 1970s (!), so I'd not be adverse to a modest engineering project if there's a sign that this sort of thing has been successfully attempted in the past.
My other question - do you happen to have any drives (of either type) you'd be willing to part with?
Thanks,
Dave
|
Hello Paul,
Thank you so much for the detailed information.
Yes, I see that the C model drive has a single ribbon cable connector, while the D model drive has a separate power connector (and square eject buttons as you suggest). I hadn't tried the alternate formatting (256 byte sectors) yet. I agree disassembly is in the offing - on the D model the right-hand drive does not latch the diskette into position. I wasn't aware of the differing rotational speed (!!! :-( )
The panasonic drive you mention seems to be available enough on ebay and similar sites, so that may be a starting point.
I'll study the manual (I did download successfully) and see whether a I can gather enough resource to make the attempt worthwhile (I'll probably have other questions). As for the interposer board, that would be easy to cobble up as a PC board (I do many of my own small circuit boards) and I'd be glad to share the results if that would be useful.
Thanks again!
Dave
|
It may be obvious, but you are using single density (720k) disks? The HD (1.44Mb) ones won't write in the old drives (They may read if written to in a 1.44Mb drive in 720k format).
Older floppy models with all the control signals tend to fetch premium prices?on ebay as some industrial equipment e.g. CNC machines used them and the machine is still valuable.
Robert G8RPI.
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I have several dozen, some 9122C, others 9122D, that have been in my barn for many years. They were bought in one lot at a DRMO sale so their operational condition is unknown.? Anyone need any? I live in south central Pennsylvania.
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I could use one to help get the one I have going.? I could probably get a good working one between them.
Peter
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On 10/31/2018 6:22 PM, Richard Coberly via Groups.Io wrote: I have several dozen, some 9122C, others 9122D, that have been in my barn for many years. They were bought in one lot at a DRMO sale so their operational condition is unknown.? Anyone need any? I live in south central Pennsylvania.
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Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Paul Berger Sent: 31 October 2018 01:09 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive? Further to my previous comments the two drive I modified to work on a 9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One thing you may encounter there are later versions of both of these drives that have less configuration options and will not be suitable.? On the YE Data drive I had to put a wire jumper on the board to get all the signals out that are required, I believe I may have had to do that with the Panasonic drive as well.? I happened to have several 1.44 diskette drives handy to experiment with.? You will probably have better luck with older drives, it seems a lot of the more recent ones are tailored for PC and have little in the way on configuration options.? The HP drives also have the power integrated into the signal cable so I made up a little interposer to go between the cable and the drive to break out the power and also to remap some of the pins. The service guide for the 9122C can be found at and it contains a pinout of the drive cable connector which can help guide you to adapting a drive. While I know nothing about the instrument you are trying to connect to, it may be that it is trying to format the diskettes at 256 bytes / sector and if the diskettes have been formatted differently before it may take a few tries before it is successful, bulk erasing the diskette first can be helpful for this. Paul. On 2018-10-30 7:52 PM, Paul Berger wrote: With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Short answer yes it is possible.? There is however an issue if the 85 in question is an 85A.? The 9122 devices follow the SS/80 command standard which was never formally supported on the 85A, the mass storage ROM for 85A only supports Amigo devices like 9121 and 9895.? The 85B had an extended mass storage ROM that supports SS/80 devices, but it is dependent on a couple ROMs that are built into the 85B.? The solution that is available now is in the form of ROM cards that take EPROMs? so you can burn the images of the 85B Mass Storage, Electronic Disk and Extended Mass Storage into EPROMs and it will work just fine in an 85A. ? When I got a 85A one of the first things I did was build a ROM card primarily for this purpose, and there is at least one other design.? Information about my designs can be found at <> there are two similar designs the first was designed specifically for 85A, but when I got an 86B I found it was not as flexible as I had planned so I created a modified version. ? I have never got around to laying out a PCB for either of these.?? At you will find information about another design and the creator of this one does produce PCB as well as assembled units periodically.
Paul.
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On 2018-11-01 11:06 AM, nigel adams wrote: Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 31 October 2018 01:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Further to my previous comments the two drive I modified to work on a
9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One
thing you may encounter there are later versions of both of these drives
that have less configuration options and will not be suitable.? On the
YE Data drive I had to put a wire jumper on the board to get all the
signals out that are required, I believe I may have had to do that with
the Panasonic drive as well.? I happened to have several 1.44 diskette
drives handy to experiment with.? You will probably have better luck
with older drives, it seems a lot of the more recent ones are tailored
for PC and have little in the way on configuration options.? The HP
drives also have the power integrated into the signal cable so I made up
a little interposer to go between the cable and the drive to break out
the power and also to remap some of the pins.
The service guide for the 9122C can be found at
and it contains a pinout of the drive cable connector which can help
guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to,
it may be that it is trying to format the diskettes at 256 bytes /
sector and if the diskettes have been formatted differently before it
may take a few tries before it is successful, bulk erasing the diskette
first can be helpful for this.
Paul.
On 2018-10-30 7:52 PM, Paul Berger wrote:
With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Hi, jumping in a bit late here but I had a 9122C arrive today which I was intending to add to my 8757C/8350B setup and I've seen pretty much the same issues you did - but I just fixed them (I think!)
Both drives made the 'right' sounds when powered up but forewarned by this thread I took the covers off to check for gummed up mechanical bits before pushing disks in.
It all looked absolutely clean and good so I tried some disks in it and saw much the same as you describe, one drive sort of tried to write data but ultimately failed and the second one wasn't interested at all.
Initializing disks failed on both a number of times but then one seemed to complete and then did then read and write correctly.
I noticed that some disks appeared to try and format a couple of times and seemed ok but then refused to write and some tried four cycles and the 8757 reported a 'hardware failure' from the initialization screen.
As this seemed to change when simply retrying the process it looked as if the drives themselves were changing so even though they looked fine I cleaned heads, slide rod and lead-screws (IPA) and lubed slide and lead-screw (sewing machine oil) and instantly they both seem fine, I have just formatted and used 3 or 4 different disks in both with no issues.
Might be worth a try?
Adrian
|
Richard,
I would be interested in one.? I'm in north west New Jersey.
Thanks,
Mike
N2LYM
|
Hi Paul,
Many thanks for that. Most useful.
The units are a mix of 85 and 85B (have four of them...)
Therefore I assume it is OK just to connect them to the 85B and it should work (if I add the GPIB interface).
However, I also have a box of ROMs and the ROM drawers with the plain one.. But they are all loose/mixed up.
Are you able to tell me which ROM would be required in a drawer for a plain 85 to work with these floppy/hard drive combo's?
Then I can sort through, populate the drawers (assuming I have the right ones!) and try it.
I really don't want to use the tape drive if I can avoid it.
Any help is most welcome - thanks again in anticipation.
Regards
Nigel
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-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Paul Berger Sent: 01 November 2018 15:34 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive? Short answer yes it is possible.? There is however an issue if the 85 in question is an 85A.? The 9122 devices follow the SS/80 command standard which was never formally supported on the 85A, the mass storage ROM for 85A only supports Amigo devices like 9121 and 9895.? The 85B had an extended mass storage ROM that supports SS/80 devices, but it is dependent on a couple ROMs that are built into the 85B.? The solution that is available now is in the form of ROM cards that take EPROMs? so you can burn the images of the 85B Mass Storage, Electronic Disk and Extended Mass Storage into EPROMs and it will work just fine in an 85A. ? When I got a 85A one of the first things I did was build a ROM card primarily for this purpose, and there is at least one other design.? Information about my designs can be found at <> there are two similar designs the first was designed specifically for 85A, but when I got an 86B I found it was not as flexible as I had planned so I created a modified version. ? I have never got around to laying out a PCB for either of these.?? At you will find information about another design and the creator of this one does produce PCB as well as assembled units periodically. Paul. On 2018-11-01 11:06 AM, nigel adams wrote: Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 31 October 2018 01:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Further to my previous comments the two drive I modified to work on a
9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One
thing you may encounter there are later versions of both of these drives
that have less configuration options and will not be suitable.? On the
YE Data drive I had to put a wire jumper on the board to get all the
signals out that are required, I believe I may have had to do that with
the Panasonic drive as well.? I happened to have several 1.44 diskette
drives handy to experiment with.? You will probably have better luck
with older drives, it seems a lot of the more recent ones are tailored
for PC and have little in the way on configuration options.? The HP
drives also have the power integrated into the signal cable so I made up
a little interposer to go between the cable and the drive to break out
the power and also to remap some of the pins.
The service guide for the 9122C can be found at
and it contains a pinout of the drive cable connector which can help
guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to,
it may be that it is trying to format the diskettes at 256 bytes /
sector and if the diskettes have been formatted differently before it
may take a few tries before it is successful, bulk erasing the diskette
first can be helpful for this.
Paul.
On 2018-10-30 7:52 PM, Paul Berger wrote:
With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Nigel,
For the 85B you will still need the Extended Mass Storage ROM to support the SS/80 devices, the built in ROM only supports Amigo devices.
Two of the ROM modules that you need to make this work in a plain 85 do not exist as modules you can plug into a 82936A ROM card the 85B mass storage and Electronic Disk ROMs where only made as mask programed ROMs in DIP packages that plugged into the main board of a 85B, this is why EPROM boards are now used along with some ROMs being very scarce.
You should also beware that the ROMs for the later 86/87 machines are in a similar package to the ROMs for the 85, but are not compatible, they should all be marked with part numbers and the ROMs for 85s all start with 00085-.
I agree on the tape drive, the only reason for getting it to work would be for complete restoration, they are not really useful as a storage device compared to diskettes. ? The draw back for hard disks is the fact that the 85 only has a flat file system which is very limiting on a disk.
Paul.
toggle quoted message
Show quoted text
On 2018-11-05 8:14 AM, nigel adams wrote: Hi Paul,
Many thanks for that. Most useful.
The units are a mix of 85 and 85B (have four of them...)
Therefore I assume it is OK just to connect them to the 85B and it should work (if I add the GPIB interface).
However, I also have a box of ROMs and the ROM drawers with the plain one.. But they are all loose/mixed up.
Are you able to tell me which ROM would be required in a drawer for a plain 85 to work with these floppy/hard drive combo's?
Then I can sort through, populate the drawers (assuming I have the right ones!) and try it.
I really don't want to use the tape drive if I can avoid it.
Any help is most welcome - thanks again in anticipation.
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 01 November 2018 15:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Short answer yes it is possible.? There is however an issue if the 85 in
question is an 85A.? The 9122 devices follow the SS/80 command standard
which was never formally supported on the 85A, the mass storage ROM for
85A only supports Amigo devices like 9121 and 9895.? The 85B had an
extended mass storage ROM that supports SS/80 devices, but it is
dependent on a couple ROMs that are built into the 85B.? The solution
that is available now is in the form of ROM cards that take EPROMs? so
you can burn the images of the 85B Mass Storage, Electronic Disk and
Extended Mass Storage into EPROMs and it will work just fine in an 85A.
? When I got a 85A one of the first things I did was build a ROM card
primarily for this purpose, and there is at least one other design.
Information about my designs can be found at
<> there are two similar designs
the first was designed specifically for 85A, but when I got an 86B I
found it was not as flexible as I had planned so I created a modified
version. ? I have never got around to laying out a PCB for either of
these.?? At you will
find information about another design and the creator of this one does
produce PCB as well as assembled units periodically.
Paul.
On 2018-11-01 11:06 AM, nigel adams wrote:
Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 31 October 2018 01:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Further to my previous comments the two drive I modified to work on a
9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One
thing you may encounter there are later versions of both of these drives
that have less configuration options and will not be suitable.? On the
YE Data drive I had to put a wire jumper on the board to get all the
signals out that are required, I believe I may have had to do that with
the Panasonic drive as well.? I happened to have several 1.44 diskette
drives handy to experiment with.? You will probably have better luck
with older drives, it seems a lot of the more recent ones are tailored
for PC and have little in the way on configuration options.? The HP
drives also have the power integrated into the signal cable so I made up
a little interposer to go between the cable and the drive to break out
the power and also to remap some of the pins.
The service guide for the 9122C can be found at
and it contains a pinout of the drive cable connector which can help
guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to,
it may be that it is trying to format the diskettes at 256 bytes /
sector and if the diskettes have been formatted differently before it
may take a few tries before it is successful, bulk erasing the diskette
first can be helpful for this.
Paul.
On 2018-10-30 7:52 PM, Paul Berger wrote:
With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Hi Paul,
Thanks for this useful additional information - much appreciated.
I'm certain that all the ROMs I have are for 85 Series.
I have at least 3 rom drawers so will populate ass you suggest and try it.
For the 85B I'll open the casing and se what is actually fitted to the board - Question - Are they easy to spot?
Do you happen to know the component ID (eg U15 or IC 35 etc. )
Regards & Thanks again for the help.
I'll let you know how it goes.
Nigel
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Paul Berger Sent: 05 November 2018 14:44 To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive? Nigel, For the 85B you will still need the Extended Mass Storage ROM to support the SS/80 devices, the built in ROM only supports Amigo devices. Two of the ROM modules that you need to make this work in a plain 85 do not exist as modules you can plug into a 82936A ROM card the 85B mass storage and Electronic Disk ROMs where only made as mask programed ROMs in DIP packages that plugged into the main board of a 85B, this is why EPROM boards are now used along with some ROMs being very scarce. You should also beware that the ROMs for the later 86/87 machines are in a similar package to the ROMs for the 85, but are not compatible, they should all be marked with part numbers and the ROMs for 85s all start with 00085-. I agree on the tape drive, the only reason for getting it to work would be for complete restoration, they are not really useful as a storage device compared to diskettes. ? The draw back for hard disks is the fact that the 85 only has a flat file system which is very limiting on a disk. Paul. On 2018-11-05 8:14 AM, nigel adams wrote: Hi Paul,
Many thanks for that. Most useful.
The units are a mix of 85 and 85B (have four of them...)
Therefore I assume it is OK just to connect them to the 85B and it should work (if I add the GPIB interface).
However, I also have a box of ROMs and the ROM drawers with the plain one.. But they are all loose/mixed up.
Are you able to tell me which ROM would be required in a drawer for a plain 85 to work with these floppy/hard drive combo's?
Then I can sort through, populate the drawers (assuming I have the right ones!) and try it.
I really don't want to use the tape drive if I can avoid it.
Any help is most welcome - thanks again in anticipation.
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 01 November 2018 15:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Short answer yes it is possible.? There is however an issue if the 85 in
question is an 85A.? The 9122 devices follow the SS/80 command standard
which was never formally supported on the 85A, the mass storage ROM for
85A only supports Amigo devices like 9121 and 9895.? The 85B had an
extended mass storage ROM that supports SS/80 devices, but it is
dependent on a couple ROMs that are built into the 85B.? The solution
that is available now is in the form of ROM cards that take EPROMs? so
you can burn the images of the 85B Mass Storage, Electronic Disk and
Extended Mass Storage into EPROMs and it will work just fine in an 85A.
? When I got a 85A one of the first things I did was build a ROM card
primarily for this purpose, and there is at least one other design.
Information about my designs can be found at
<> there are two similar designs
the first was designed specifically for 85A, but when I got an 86B I
found it was not as flexible as I had planned so I created a modified
version. ? I have never got around to laying out a PCB for either of
these.?? At you will
find information about another design and the creator of this one does
produce PCB as well as assembled units periodically.
Paul.
On 2018-11-01 11:06 AM, nigel adams wrote:
Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 31 October 2018 01:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Further to my previous comments the two drive I modified to work on a
9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One
thing you may encounter there are later versions of both of these drives
that have less configuration options and will not be suitable.? On the
YE Data drive I had to put a wire jumper on the board to get all the
signals out that are required, I believe I may have had to do that with
the Panasonic drive as well.? I happened to have several 1.44 diskette
drives handy to experiment with.? You will probably have better luck
with older drives, it seems a lot of the more recent ones are tailored
for PC and have little in the way on configuration options.? The HP
drives also have the power integrated into the signal cable so I made up
a little interposer to go between the cable and the drive to break out
the power and also to remap some of the pins.
The service guide for the 9122C can be found at
and it contains a pinout of the drive cable connector which can help
guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to,
it may be that it is trying to format the diskettes at 256 bytes /
sector and if the diskettes have been formatted differently before it
may take a few tries before it is successful, bulk erasing the diskette
first can be helpful for this.
Paul.
On 2018-10-30 7:52 PM, Paul Berger wrote:
With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Nigel,
On hpmuseum.net there is a service manual complete with schematic and component placement diagram U18 is the electronic disk ROM and U19 is the Mass storage ROM, they both should be present on the 85B as they where standard not an option.? The ROM modules used on the system board are not industry standard ROM modules, they have electronics built into them to directly interface with the Capricorn processor bus and also address decoding.
Paul.
toggle quoted message
Show quoted text
On 2018-11-06 7:59 AM, nigel adams wrote: Hi Paul,
Thanks for this useful additional information - much appreciated.
I'm certain that all the ROMs I have are for 85 Series.
I have at least 3 rom drawers so will populate ass you suggest and try it.
For the 85B I'll open the casing and se what is actually fitted to the board - Question - Are they easy to spot?
Do you happen to know the component ID (eg U15 or IC 35 etc. )
Regards & Thanks again for the help.
I'll let you know how it goes.
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 05 November 2018 14:44
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Nigel,
For the 85B you will still need the Extended Mass Storage ROM to support
the SS/80 devices, the built in ROM only supports Amigo devices.
Two of the ROM modules that you need to make this work in a plain 85 do
not exist as modules you can plug into a 82936A ROM card the 85B mass
storage and Electronic Disk ROMs where only made as mask programed ROMs
in DIP packages that plugged into the main board of a 85B, this is why
EPROM boards are now used along with some ROMs being very scarce.
You should also beware that the ROMs for the later 86/87 machines are in
a similar package to the ROMs for the 85, but are not compatible, they
should all be marked with part numbers and the ROMs for 85s all start
with 00085-.
I agree on the tape drive, the only reason for getting it to work would
be for complete restoration, they are not really useful as a storage
device compared to diskettes. ? The draw back for hard disks is the fact
that the 85 only has a flat file system which is very limiting on a disk.
Paul.
On 2018-11-05 8:14 AM, nigel adams wrote:
Hi Paul,
Many thanks for that. Most useful.
The units are a mix of 85 and 85B (have four of them...)
Therefore I assume it is OK just to connect them to the 85B and it should work (if I add the GPIB interface).
However, I also have a box of ROMs and the ROM drawers with the plain one.. But they are all loose/mixed up.
Are you able to tell me which ROM would be required in a drawer for a plain 85 to work with these floppy/hard drive combo's?
Then I can sort through, populate the drawers (assuming I have the right ones!) and try it.
I really don't want to use the tape drive if I can avoid it.
Any help is most welcome - thanks again in anticipation.
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 01 November 2018 15:34
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Short answer yes it is possible.? There is however an issue if the 85 in
question is an 85A.? The 9122 devices follow the SS/80 command standard
which was never formally supported on the 85A, the mass storage ROM for
85A only supports Amigo devices like 9121 and 9895.? The 85B had an
extended mass storage ROM that supports SS/80 devices, but it is
dependent on a couple ROMs that are built into the 85B.? The solution
that is available now is in the form of ROM cards that take EPROMs? so
you can burn the images of the 85B Mass Storage, Electronic Disk and
Extended Mass Storage into EPROMs and it will work just fine in an 85A.
? When I got a 85A one of the first things I did was build a ROM card
primarily for this purpose, and there is at least one other design.
Information about my designs can be found at
<> there are two similar designs
the first was designed specifically for 85A, but when I got an 86B I
found it was not as flexible as I had planned so I created a modified
version. ? I have never got around to laying out a PCB for either of
these.?? At you will
find information about another design and the creator of this one does
produce PCB as well as assembled units periodically.
Paul.
On 2018-11-01 11:06 AM, nigel adams wrote:
Dear Friends of the supreme knowledge,
I have a couple of the single/double FDD/HDD variations of this style of unit.
My question is if anyone knows if they can be used with the HP85 computer...?
What do I need, is there any special s/w required and if so does anyone know where to source it.
Essentially I want to use these in place of the little tape drives internal to the HP85 which are past their best.
All help advice welcome..
Regards
Nigel
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Berger
Sent: 31 October 2018 01:09
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 9122C & 9122D floppy drive units - adapt to use a contemporary (3.5" 1.4MB) diskette drive?
Further to my previous comments the two drive I modified to work on a
9122C are a Panasonic JU-257A606P and a YE Data YD-702D-6037D.? One
thing you may encounter there are later versions of both of these drives
that have less configuration options and will not be suitable.? On the
YE Data drive I had to put a wire jumper on the board to get all the
signals out that are required, I believe I may have had to do that with
the Panasonic drive as well.? I happened to have several 1.44 diskette
drives handy to experiment with.? You will probably have better luck
with older drives, it seems a lot of the more recent ones are tailored
for PC and have little in the way on configuration options.? The HP
drives also have the power integrated into the signal cable so I made up
a little interposer to go between the cable and the drive to break out
the power and also to remap some of the pins.
The service guide for the 9122C can be found at
and it contains a pinout of the drive cable connector which can help
guide you to adapting a drive.
While I know nothing about the instrument you are trying to connect to,
it may be that it is trying to format the diskettes at 256 bytes /
sector and if the diskettes have been formatted differently before it
may take a few tries before it is successful, bulk erasing the diskette
first can be helpful for this.
Paul.
On 2018-10-30 7:52 PM, Paul Berger wrote:
With a little work certain 1.44 drives can be made to work in a 9122C
the usual stumbling block is the controller in the 9122 wants to see
the ready signal, but I did manage to make a couple drives work, but
don't have the models handy.
The 9122D is a different story, it uses 720K drives that turn at 600
RPM and unlike most other 3.5 diskette drives.? There where two
versions of drives used. The earlier models used a full high drive
with a square eject button on the bottom right of the drive, about the
only place you can get replacements for this drive is from other
9122S/D units or there where also a couple disk/ diskette combo units
that used these drives.? The newer version is a half high drive with a
rectangular eject button at the bottom right, this drive was used in a
lot of HP equipment so replacements are easier to find.? One of the
prevalent problems with these drives and especially the full high
versions is lubricants used on the load/eject mechanism dry and
becomes gummy and the diskettes do not load or eject properly and it
is dangerous because the upper head may not retract properly and if
you pull out the diskette when it is like this the upper head will
come out with it.? I would strongly recommend you open the units and
do a general inspect, clean and lube.
Paul.
On 2018-10-30 7:39 PM, David Feldman via Groups.Io wrote:
I ended up with both HP 9122C and 9122D (dual floppy drive) units.
Both are recognized by my 8753 network analyzer (up to the point that
setting incorrect GPIB address and setting incorrect disc/volume
number has the expected error message results), all four drives make
familiar sounds during power-up and normal operation, however, only
one of the drives (in the 9122C) can read a diskette (list files on
the media), and none can write or initialize diskettes. I am
uncertain whether the onboard controllers are fully functional, but
both appear complete and physically undamaged.
My question is this - can a contemporary (i.e., a 3-1/2" 1.4MB floppy
drive) be adapted for use in either of these units? The 9122C uses a
single (0.05" pitch) ribbon cable between the drives and the
controller board; the 9122D has a somewhat narrower (0.05" pitch)
ribbon cable and a 4-pin power connector. None of the connectors are
identical to those used in contemporary floppy drives. I haven't
looked for/at service documentation (yet). My last exposure to floppy
drive equipment (at engineering, hardware and firmware level) was in
the mid-late 1970s (!), so I'd not be adverse to a modest engineering
project if there's a sign that this sort of thing has been
successfully attempted in the past.
My other question - do you happen to have any drives (of either type)
you'd be willing to part with?
Thanks,
Dave
|
Dave and? Paul,
3-1/2 floppies from a PC are not compatible with the 9122C and 9122D.? Even the floppy drives between the two units are not interchangeable.? ?I have a supply of the High(9153C, 9122C), medium(9122D, 9133D/H/L), and low(9122, 9133XV) density floppy drives if you are interested in getting your units working.? ? EMAIL:? ghnatiuk@...
GH
|
Some 1.44 PC? drives can be made to work in in a 9122C, I know
because I have done it.? The drives just need to be able to supply
the signals expected by the 9122C.
Paul.
toggle quoted message
Show quoted text
Dave and? Paul,
3-1/2 floppies from a PC are not compatible with the 9122C and
9122D.? Even the floppy drives between the two units are not
interchangeable.? ?I have a supply of the High(9153C, 9122C),
medium(9122D, 9133D/H/L), and low(9122, 9133XV) density floppy
drives if you are interested in getting your units working.? ?
EMAIL:? ghnatiuk@...
GH
|
Paul,
Having to modify the drives IMPLIES they are incompatible.? Anything can be made to work if you are willing to put the time in to modify the assembly.? ?If you do not value your time, then go ahead and do it.? ?
I can save you that effort and sell you a certified working floppy drive for $60 plus shipping in a USPS small box.
This assumes you will attach the bezel from the defective drive to the new floppy.? I do not have spare bezels to sell for a reasonable price.
GH
|
Whatever.......? Its not a big effort when you know what you are
doing.? ? I have bought whole 9122s for $60.
Paul.
toggle quoted message
Show quoted text
Paul,
Having to modify the drives IMPLIES they are incompatible.?
Anything can be made to work if you are willing to put the time in
to modify the assembly.? ?If you do not value your time, then go
ahead and do it.? ?
I can save you that effort and sell you a certified working floppy
drive for $60 plus shipping in a USPS small box.
This assumes you will attach the bezel from the defective drive to
the new floppy.? I do not have spare bezels to sell for a
reasonable price.
GH
|
