NMS 1250 RS232 conversion

Rookie (32)

11-01-2018, 03:45

A couple days ago I found this guide (dutch) for converting the NMS1250 (and other modems) to a rudimentary RS232 interface.

Being over-enthusiastic as I am, I straight away I got the parts I needed, soldered the whole thing together, and... realized I have no idea what to do with it now! I can't find the software (MOD.COM) mentioned in the guide, so far... and I have no idea how I could test this now (or even do anything with it at all).

Does anyone know anything about this at all? Or have any pointers for software to try?

By Philip

Champion (380)

11-01-2018, 09:45

This is something I still want to do as I don't have my sony rs232 anymore.
Ofcourse you already built the thing, but the rs232 connections on the Z8530 are 5V which should connect straight to one of those cheap usb rs232 converters (which I already have for flashing the gotek...).

For software http://www.funet.fi/pub/msx/utils/datacom/erix_pd.lzh should work.

By Manuel

Ascended (19468)

11-01-2018, 22:24

Connect an external modem to it... and... nah, useless nowadays.

You could make a nullmodem cable and connect another MSX to it via RS-232C Or any other RS-232C device.

By Philip

Champion (380)

11-01-2018, 22:27

My plan was to use it as a terminal for my linux server, mostly just because you can

By Grauw

Ascended (10768)

11-01-2018, 22:28

Retrieve files from PC over RS232 is a nice application I think.

By sd_snatcher

Prophet (3659)

12-01-2018, 11:13

Tip: if you want to soup up the upgrade with a BIOS, the Gradiente RS-232 also has the Z8530 UART. This way you'll be able to easily use it even on MSX-BASIC.

By Philip

Champion (380)

12-01-2018, 15:06

Oh, that's interesting.
According to the nms1210 manual the rs232 bios can be loaded from disk. Perhaps it will also work with a converted nms1250. It seems to use the same i/o ports at least....

By roadfighter

Champion (461)

14-01-2018, 10:02

There was a program for a serial connection to your pc. I thought is was from Eugeny and Eric Boez. if i am not mistaken.
This is the program link on MRC.

RS232 software from Eric and Eugeny

By Lynn

Rookie (32)

04-02-2018, 20:18

A bit late, but wanted to thank everyone for all the replies! I'll definitely have to try some of these things out soon!