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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
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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.
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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 ? |