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Another new file

 

With thanks to 'Greyhawk,' a pair of firmware image files for the 7B90P programmable timebase are now available. Note that these images are 2048 byte, meaning that they were most likely designed to program into a 2716. Considering that 2716's may be pretty hard to find, advice on whether they'll work in a 2732 or even a 2764 would be welcome.

Keep the peace(es).


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
 

Oh, 2732 will work, just make sure that un-used address bit (A11, pin 21) is
nailed down, so that it is lower half of PROM that is read. As for 2764,
that is a different proposition because it is 28 pin DIP (four pins more
than 2716 or 2732), but doing a jerry rig to translate pins would make it
usable.

You have also to watch programing voltage. Some of early PROMs used 21V,
then came 15 V, then 12 V. You can program 12V device on 15V programmer
setting, but there is no promise that device will not be damaged.

Another consideration is speed, but as densities went up, so did the speed.
If PCB is poorly decoupled, higher speed might work against you, but that is
not very likely to happen.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Bruce Lane" <kyrrin@...>
To: <tekscopes@...>
Sent: Sunday, March 07, 2004 2:31 PM
Subject: [TekScopes] Another new file


With thanks to 'Greyhawk,' a pair of firmware image files for the 7B90P
programmable timebase are now available. Note that these images are 2048
byte, meaning that they were most likely designed to program into a 2716.
Considering that 2716's may be pretty hard to find, advice on whether
they'll work in a 2732 or even a 2764 would be welcome.

Keep the peace(es).


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with
surreal ports?"
 

Hi, Miroslav,

* REPLY SEPARATOR *

On 07-Mar-04 at 23:08 Miroslav Pokorni wrote:

Oh, 2732 will work, just make sure that un-used address bit (A11, pin 21)
is
nailed down, so that it is lower half of PROM that is read. As for 2764,
that is a different proposition because it is 28 pin DIP (four pins more
than 2716 or 2732), but doing a jerry rig to translate pins would make it
usable.

You have also to watch programing voltage. Some of early PROMs used 21V,
then came 15 V, then 12 V. You can program 12V device on 15V programmer
setting, but there is no promise that device will not be damaged.
<g> Programming is the least of my worries. When Data I/O designed the Unisite, they designed it to be 'pin driven.' This means that each pin is, according to whatever algorithm you're using, automatically and accurately programmed for Vpp, Vcc, and a bunch of other alphabet soup as needed.

Thanks for the heads-up.


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"
pe1fbo
 

Hi All,

If the 2716 is a problem, you might want to go for the CAT28C16
EEPROM
This one is pin-compatble and still avalable from Catalyst (or any
other 28C16 which you can get)

Fred de Vries


--- In TekScopes@..., "Bruce Lane" <kyrrin@b...> wrote:
Hi, Miroslav,

* REPLY SEPARATOR *

On 07-Mar-04 at 23:08 Miroslav Pokorni wrote:

Oh, 2732 will work, just make sure that un-used address bit (A11,
pin 21)
is
nailed down, so that it is lower half of PROM that is read. As
for 2764,
that is a different proposition because it is 28 pin DIP (four
pins more
than 2716 or 2732), but doing a jerry rig to translate pins would
make it
usable.

You have also to watch programing voltage. Some of early PROMs
used 21V,
then came 15 V, then 12 V. You can program 12V device on 15V
programmer
setting, but there is no promise that device will not be damaged.
<g> Programming is the least of my worries. When Data I/O
designed the Unisite, they designed it to be 'pin driven.' This
means that each pin is, according to whatever algorithm you're
using, automatically and accurately programmed for Vpp, Vcc, and a
bunch of other alphabet soup as needed.

Thanks for the heads-up.


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been
equipped with surreal ports?"
 

(Data I/O), so much more reason to be careful. Possibiliies are infinite and
have to watch for fine print (manufacturer, IC revision, algoritham revision
etc.), or you will fry the PROM.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Bruce Lane" <kyrrin@...>
To: <tekscopes@...>
Sent: Monday, March 08, 2004 5:40 AM
Subject: Re: [TekScopes] Another new file


Hi, Miroslav,

* REPLY SEPARATOR *

On 07-Mar-04 at 23:08 Miroslav Pokorni wrote:

Oh, 2732 will work, just make sure that un-used address bit (A11, pin 21)
is
nailed down, so that it is lower half of PROM that is read. As for 2764,
that is a different proposition because it is 28 pin DIP (four pins more
than 2716 or 2732), but doing a jerry rig to translate pins would make it
usable.

You have also to watch programing voltage. Some of early PROMs used 21V,
then came 15 V, then 12 V. You can program 12V device on 15V programmer
setting, but there is no promise that device will not be damaged.
<g> Programming is the least of my worries. When Data I/O designed the
Unisite, they designed it to be 'pin driven.' This means that each pin is,
according to whatever algorithm you're using, automatically and accurately
programmed for Vpp, Vcc, and a bunch of other alphabet soup as needed.

Thanks for the heads-up.


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with
surreal ports?"

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