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Re: Unable to get SIO card working
Hi Morgan, Sorry, I missed this email post.? Ok, so where are you at now?? If you boil it down, the circuit either fails because of a bad component or bad circuitry. It's a slow process, but perhaps you can remove most chips and start ohming every trace?? Ohm it along the way from point a to b for shorts with adjacent traces. Cheers, Josh
On Saturday, September 19, 2020, 09:05:10 p.m. EDT, Morgan <mhtbx118@...> wrote:
Hello Josh, Unfortunately I don't have one of those to test with. I'm mostly limited to just a multimeter at the moment. Thanks,? Morgan |
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Re: Unable to get SIO card working
Hi Morgan,?
I haven't actually measured the current draw on my boards, but 200mA was a guess at the most it should use.? I think 70mA is good enough. If you put a scope on the UART output and power CPU + SIO board, do you get any output? Scope the UART CS, is it getting addressed? Josh
On Friday, September 18, 2020, 5:20:27 PM EDT, Morgan <mhtbx118@...> wrote:
Hello Josh, I think I connected my multimeter correctly, I put it between the FTDI cable and the terminal on the side, and I ended up measuring ~70mA with the SIO and CPU cards. I tried out the other combinations and got 80mA with the Front Panel connected and 56mA with all cards connected. Unless I made a mistake connecting it looks like its low instead of high. I did find out however that if I have the Front Panel connected and I hit the reset buttons (F and 0) on there the SD card LEDs will flash. So that's something at least. Thanks,
Morgan
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Re: Unable to get SIO card working
开云体育I have found on my setup that the stacking connectors are particularly sensitive. Sometimes I need to play with the stack to get it working properly.
http://www.classiccmp.org/cini
Long Island S100 User’s Group
Get for iOS
From: [email protected] <[email protected]> on behalf of Morgan <mhtbx118@...>
Sent: Friday, September 18, 2020 5:20:26 PM To: [email protected] <[email protected]> Subject: Re: [Z80MC] Unable to get SIO card working ?
Hello Josh,
I think I connected my multimeter correctly, I put it between the FTDI cable and the terminal on the side, and I ended up measuring ~70mA with the SIO and CPU cards. I tried out the other combinations and got 80mA with the Front Panel connected and 56mA with all cards connected. Unless I made a mistake connecting it looks like its low instead of high. I did find out however that if I have the Front Panel connected and I hit the reset buttons (F and 0) on there the SD card LEDs will flash. So that's something at least. Thanks,
Morgan
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Re: Unable to get SIO card working
Hello Josh,
I think I connected my multimeter correctly, I put it between the FTDI cable and the terminal on the side, and I ended up measuring ~70mA with the SIO and CPU cards. I tried out the other combinations and got 80mA with the Front Panel connected and 56mA with all cards connected. Unless I made a mistake connecting it looks like its low instead of high. I did find out however that if I have the Front Panel connected and I hit the reset buttons (F and 0) on there the SD card LEDs will flash. So that's something at least. Thanks,
Morgan |
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Re: Unable to get SIO card working
Hi Morgan, Can you measure the current draw?? Should be about 200mA I think?? If it's too high, try removing the UART chip, it may be faulty? Try other chips, remove one at a time. If you are in Canada you are welcome to mail me the board if we get stuck.? Or even come visit me if you're near Toronto. Cheers, Josh
On Friday, September 18, 2020, 06:59:04 a.m. EDT, mhtbx118@... <mhtbx118@...> wrote:
Hello everyone, hope you're having a fine day!
?
I just picked up this kit a few weeks ago and I haven't been able to get the SIO card working. The front panel and CPU card work fine together but if I have the SIO card installed nothing seems to work. I have tried it with and without the front panel card.
?
When I plug the SIO card in the only thing that happens is the LEDs flash a few times then stay on or turn off. Nothing comes out over the terminal connection (assuming the setting are the same as the front panel settings, which work fine). As for troubleshooting, I have checked to make sure there is no solder bridges that are obvious, and I tried to reflow the joints to be sure I didn't mess any up. I reseated the socketed chips and made sure that there was continuity between the pins and the solder joints on the underside of the board. I did replace R6 in a really stupid way because I somehow missed that it was supposed to look like it did. I honestly don't know how I missed that considering all the times I read through trying to figure out where I went wrong. Hopefully I didn't screw it up worse with that.
?
I've swapped the files on the SD card multiple times to make sure I didn't mess that up but I've had no luck with that.
?
And at this point I have exhausted my ability to troubleshoot and I'm hoping someone here can give me a hand in getting this running. I'm sure its going to be something stupidly simple because I always miss the easy stuff.
?
?
I have some closeups of my boards if anyone wants to see them to make sure its not a stupid mistake:?
?
Thanks for any help you can give!
Morgan
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Unable to get SIO card working
Hello everyone, hope you're having a fine day!
?
I just picked up this kit a few weeks ago and I haven't been able to get the SIO card working. The front panel and CPU card work fine together but if I have the SIO card installed nothing seems to work. I have tried it with and without the front panel card.
?
When I plug the SIO card in the only thing that happens is the LEDs flash a few times then stay on or turn off. Nothing comes out over the terminal connection (assuming the setting are the same as the front panel settings, which work fine). As for troubleshooting, I have checked to make sure there is no solder bridges that are obvious, and I tried to reflow the joints to be sure I didn't mess any up. I reseated the socketed chips and made sure that there was continuity between the pins and the solder joints on the underside of the board. I did replace R6 in a really stupid way because I somehow missed that it was supposed to look like it did. I honestly don't know how I missed that considering all the times I read through trying to figure out where I went wrong. Hopefully I didn't screw it up worse with that.
?
I've swapped the files on the SD card multiple times to make sure I didn't mess that up but I've had no luck with that.
?
And at this point I have exhausted my ability to troubleshoot and I'm hoping someone here can give me a hand in getting this running. I'm sure its going to be something stupidly simple because I always miss the easy stuff.
?
?
I have some closeups of my boards if anyone wants to see them to make sure its not a stupid mistake:?
?
Thanks for any help you can give!
Morgan |
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Re: SIO and Hayesmodem
开云体育Thanks Josh. Modem works fine with a PC dialing into the BBS so it’s not that. I found another CP/M modem program to try. I also got the 32k RAM today so I might swap that out as well and re-enable RTS. I also probably need to spend
some time slogging through the code — I bet it’s getting hung up waiting for the handshake and not getting it because I disabled it in the port initialization.?
The Digi Board works great. You need to run Searchlight in Windows and run one instance of it per port but pointing each to the same database.?
I do want to setup the Walnut Creek CDROM as the “file archive” just so there’s something to do. Need to figure out how to import it.?
Rich
http://www.classiccmp.org/cini
Long Island S100 User’s Group
Get for iOS
From: [email protected] <[email protected]> on behalf of joshbensadon via groups.io <joshbensadon@...>
Sent: Wednesday, September 2, 2020 10:09 PM To: [email protected]; [email protected] Subject: Re: [Z80MC] SIO and Hayesmodem ?
Rich, I guess next step is try the modem on your PC terminal.??
Searchlight BBS? Cool, I used to run a BBS in the late 80's on Searchlight.? Frank LaRosa was the guy that made Searchlight.? Why can I remember his name from 30 years ago but I can't remember what I had for breakfast?? Anyway, that software
was simple enough to setup... but the digi board will definitely add some complexity.
Cheers,
Josh On Monday, August 31, 2020, 07:13:55 p.m. EDT, Richard Cini <rich.cini@...> wrote:
I had time today to try the handshaking loopback on the modem side and there was no change in the outcome. It will connect but do nothing. Hitting a key causes a disconnect.
I rebuilt the BBS server using Windows 98SE and Searchlight 5.1. I have multinode capability now which is cool. No files yet and no users but it’s a start.
I probably need to look at the settings and see if there’s a way to force it to ASCII-only. Searchlight is supposed to auto-identify the calling terminal but maybe that’s messing it up. I also need to walk the MODEM221 code a bit
and see what’s going on.
I never setup a BBS before. It’s reasonably easy to do but tricky when trying to use a Digi multi-port serial board. Need to figure out the file areas part now.
Rich
http://www.classiccmp.org/cini
Long Island S100 User’s Group
Get for iOS
From: [email protected] <[email protected]> on behalf of Richard Cini via groups.io <rich.cini@...>
Sent: Wednesday, August 26, 2020 7:53:52 AM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Good point as always. Need to dig out my break-out box for that.
Get
From: [email protected] <[email protected]> on behalf of joshbensadon via groups.io <joshbensadon@...>
Sent: Tuesday, August 25, 2020 9:42:21 PM To: [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Might want to try looping back the RTS/CTS and the DTR/DSR pairs on the modem.? That might fool it to work with 3-wire RX/TX/Gnd RS-232
On Monday, August 24, 2020, 7:57:45 PM EDT, Richard Cini <rich.cini@...> wrote:
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini
?
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Re: SIO and Hayesmodem
Rich, I guess next step is try the modem on your PC terminal.?? Searchlight BBS? Cool, I used to run a BBS in the late 80's on Searchlight.? Frank LaRosa was the guy that made Searchlight.? Why can I remember his name from 30 years ago but I can't remember what I had for breakfast?? Anyway, that software was simple enough to setup... but the digi board will definitely add some complexity. Cheers, Josh
On Monday, August 31, 2020, 07:13:55 p.m. EDT, Richard Cini <rich.cini@...> wrote:
I had time today to try the handshaking loopback on the modem side and there was no change in the outcome. It will connect but do nothing. Hitting a key causes a disconnect.
I rebuilt the BBS server using Windows 98SE and Searchlight 5.1. I have multinode capability now which is cool. No files yet and no users but it’s a start.
I probably need to look at the settings and see if there’s a way to force it to ASCII-only. Searchlight is supposed to auto-identify the calling terminal but maybe that’s messing it up. I also need to walk the MODEM221 code a bit
and see what’s going on.
I never setup a BBS before. It’s reasonably easy to do but tricky when trying to use a Digi multi-port serial board. Need to figure out the file areas part now.
Rich
http://www.classiccmp.org/cini
Long Island S100 User’s Group
Get for iOS
From: [email protected] <[email protected]> on behalf of Richard Cini via groups.io <rich.cini@...>
Sent: Wednesday, August 26, 2020 7:53:52 AM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Good point as always. Need to dig out my break-out box for that.
Get
From: [email protected] <[email protected]> on behalf of joshbensadon via groups.io <joshbensadon@...>
Sent: Tuesday, August 25, 2020 9:42:21 PM To: [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Might want to try looping back the RTS/CTS and the DTR/DSR pairs on the modem.? That might fool it to work with 3-wire RX/TX/Gnd RS-232
On Monday, August 24, 2020, 7:57:45 PM EDT, Richard Cini <rich.cini@...> wrote:
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini ? |
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Re: SIO and Hayesmodem
开云体育I had time today to try the handshaking loopback on the modem side and there was no change in the outcome. It will connect but do nothing. Hitting a key causes a disconnect.
I rebuilt the BBS server using Windows 98SE and Searchlight 5.1. I have multinode capability now which is cool. No files yet and no users but it’s a start.
I probably need to look at the settings and see if there’s a way to force it to ASCII-only. Searchlight is supposed to auto-identify the calling terminal but maybe that’s messing it up. I also need to walk the MODEM221 code a bit
and see what’s going on.
I never setup a BBS before. It’s reasonably easy to do but tricky when trying to use a Digi multi-port serial board. Need to figure out the file areas part now.
Rich
http://www.classiccmp.org/cini
Long Island S100 User’s Group
Get for iOS
From: [email protected] <[email protected]> on behalf of Richard Cini via groups.io <rich.cini@...>
Sent: Wednesday, August 26, 2020 7:53:52 AM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Good point as always. Need to dig out my break-out box for that.
Get
From: [email protected] <[email protected]> on behalf of joshbensadon via groups.io <joshbensadon@...>
Sent: Tuesday, August 25, 2020 9:42:21 PM To: [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Might want to try looping back the RTS/CTS and the DTR/DSR pairs on the modem.? That might fool it to work with 3-wire RX/TX/Gnd RS-232
On Monday, August 24, 2020, 7:57:45 PM EDT, Richard Cini <rich.cini@...> wrote:
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini ? |
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Re: SIO and Hayesmodem
开云体育Good point as always. Need to dig out my break-out box for that.
Get
From: [email protected] <[email protected]> on behalf of joshbensadon via groups.io <joshbensadon@...>
Sent: Tuesday, August 25, 2020 9:42:21 PM To: [email protected] <[email protected]>; [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Might want to try looping back the RTS/CTS and the DTR/DSR pairs on the modem.? That might fool it to work with 3-wire RX/TX/Gnd RS-232
On Monday, August 24, 2020, 7:57:45 PM EDT, Richard Cini <rich.cini@...> wrote:
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini ? |
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Re: SIO and Hayesmodem
Might want to try looping back the RTS/CTS and the DTR/DSR pairs on the modem.? That might fool it to work with 3-wire RX/TX/Gnd RS-232
On Monday, August 24, 2020, 7:57:45 PM EDT, Richard Cini <rich.cini@...> wrote:
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote:
? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini ?
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Re: SIO and Hayesmodem
开云体育Thanks Mark. I never inspected the modems I have,
but it’s worth a look based on your experiences.
Get
From: [email protected] <[email protected]> on behalf of Mark Thomas <mark@...>
Sent: Tuesday, August 25, 2020 8:02:19 AM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Rich,
On Tue, Aug 25, 2020 at 11:45:46AM +0000, Richard Cini wrote: >??? From: [email protected] <[email protected]> on behalf of Richard Cini >??? <rich.cini@...> > >??? Just a quick update on this. I have a BBS (Synchronet) running enough >??? that I can dial-in from another PC and connect properly. I started with >??? the Hayesmodem 300, which was painful, and then changed to the Hayes >??? Optima 144 which was respectable for dial-up. I had a number of Optima 144 modems, and they all had severe PCB damage from leaked surface mount caps--more damage than I had the patience to try to fix. I was able to rescue/preserve a Hayes Ultra-96 and Optima-288 by replacing the surface mount caps. I used conventional electrolytics from my spare parts box, with strategically bent leads, as I trust these more not to leak over time. You might consider doing similarly, if you care about your modem. Mark -- Mark G. Thomas <Mark@...>, KC3DRE |
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Re: SIO and Hayesmodem
Rich,
On Tue, Aug 25, 2020 at 11:45:46AM +0000, Richard Cini wrote: From: [email protected] <[email protected]> on behalf of Richard CiniI had a number of Optima 144 modems, and they all had severe PCB damage from leaked surface mount caps--more damage than I had the patience to try to fix. I was able to rescue/preserve a Hayes Ultra-96 and Optima-288 by replacing the surface mount caps. I used conventional electrolytics from my spare parts box, with strategically bent leads, as I trust these more not to leak over time. You might consider doing similarly, if you care about your modem. Mark -- Mark G. Thomas <Mark@...>, KC3DRE |
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Re: SIO and Hayesmodem
开云体育Yes. Synchronet 3.17 running on XP, which is Telnet only. It uses “COM-to-telnet” bridge software to support POTS. I had a spare PC handy so I set it up as a quick test to give the Z80MC something to connect to.
Get
From: [email protected] <[email protected]> on behalf of bill rowe <bill_rowe_ottawa@...>
Sent: Tuesday, August 25, 2020 7:39:03 AM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
rich: synchronet is running on a PC?
From: [email protected] <[email protected]> on behalf of Richard Cini <rich.cini@...>
Sent: August 24, 2020 7:57 PM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini
? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini
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Re: SIO and Hayesmodem
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From: [email protected] <[email protected]> on behalf of Richard Cini <rich.cini@...>
Sent: August 24, 2020 7:57 PM To: [email protected] <[email protected]> Subject: Re: [Z80MC] SIO and Hayesmodem ?
Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini
? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote: ? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini
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Re: SIO and Hayesmodem
开云体育Just a quick update on this. I have a BBS (Synchronet) running enough that I can dial-in from another PC and connect properly. I started with the Hayesmodem 300, which was painful, and then changed to the Hayes Optima 144 which was respectable for dial-up. ? Using the Z80MC, I can get the modem to go off-hook, dial, and connect but it’s not sending/receiving. I use this same modem with HyperTerm to dial the BBS, so it’s not the modem or cable. I’m thinking it’s related to handshaking so I need to look at the init string.?I might also try the following: switch to 32K SRAM and lift the RTS/CTS pins on the 8250 and bring them out to the level shifter DE9 that I have and see if that makes a difference – it would provide full handshaking. ? Even with that, overall, good progress in getting it going. More to come once I get the 32K SRAM next week. ? Rich ? -- Rich Cini ? ? On 8/18/20, 10:10 AM, "Richard Cini" <rich.cini@...> wrote:
? Good point. I think I have a 512K one because that’s what I had handy – they’re used in many of the Retrobrew ECB and John Monahan’s S100 various boards. I don’t think I have any 62256 chips around, but so long as I keep handshaking disabled, we should be good. ? I will give a revised ROM a try. It’s just an extra set of steps to use, but might be a fair compromise given the very narrow use for this. ? I requested a full data sheet on the modem from the manufacturer. It uses the AT command set which is good, but it has a reset pin, so I’m looking for the required pulse width for it. RESET isn’t exposed on the Z80MC when it’s in a case – P1 on the SIO has a missing “key” pin with no hole. So, I plan on a simple RC circuit local to the modem (if needed). ? I found a text-based browser called “Links” which is like Lynx but it seems to be pure text with no DOS-graphic characters. It’s written in C, so maybe there’s a way to pare it down to a bare minimum just to parse basic HTML. Need to look at that. ? More to come! ? Rich ? -- Rich Cini ? _._,_._,_ |
Paul Bigwood