MSX WiFi via RS232?

By Pencioner

Paladin (949)

Pencioner's picture

26-07-2018, 00:31

It says MSX on this link - RS232 WiFi - but would it work and be actually useful? Does anybody know more about that?

Login or register to post comments

By mxmy

Resident (39)

mxmy's picture

26-07-2018, 08:08

I have one of those but I haven't used it yet as I need to get a terminal program up and running. The customer support at Simulant so far has been awesome. Hoping to do some BBS surfing once It's up and running Smile

By dmr

Supporter (4)

dmr's picture

28-09-2018, 23:22

An alternative, and probably cheaper, is to make a very simple wifi adapter for MSX by modifying an MT-Telcom modem... based on the description in:

https://docplayer.nl/28176578-Goedkope-rs232-msx-computer-ma...

However, instead of the 1488/1489 I connected an ESP-01 directly to the 8251. The ESP-01 is loaded with the NodeMCU firmware and a simple HTTP-server and Telnet-server. And it works, for now only with a terminal program (the one built into the MT-Telcom), but it should not be too dificult to do other stuff with it.

I am also working on a homebrew wifi adapter, using an Arduino, an ESP and a 74HC688, but that is a project I've been doing for years... and it does not go fast :-(

By dmr

Supporter (4)

dmr's picture

06-10-2018, 14:01

This is a picture of the MT-Telcom II modem with wifi-add-on:

... a fairly simple add-on. For now works only with a terminal program (for MT-Telcom this is inside the built-in ROM); Wifi can be accessed using standard NodeMCU commands. An example:

By sd_snatcher

Prophet (3068)

sd_snatcher's picture

06-10-2018, 15:48

Does this WiFi module have hardware flow control? Otherwise the MSX probably will loose data under heavy load.

By Pencioner

Paladin (949)

Pencioner's picture

06-10-2018, 22:10

@dmr how did you get the Lua console on MSX? Shocked! is it built into the wifi addon?

By dmr

Supporter (4)

dmr's picture

06-10-2018, 23:14

The ESP is flashed with NodeMCU-firmware(*). The MSX talks to the ESP ( - Lua console) via serial; rx/tx only, so no flow-control For now I have set this to 2400 bps in the ESP, just for testing. The MT-Telcom should be able to handle higher speeds.

@sd_snatcher: the Wifi adapter (ESP-01/ESP8266) does all the networking stuff, it is -despite its size- a fairly sophisticated SoC; it even has an embedded filesystem where you can store programs (Lua) and other files. If you put a telnet server program on it, you can access it directly from PC's/Macs/etc; so you can put files via wifi on this "MSX wifi adapter".

This mini-project is a spin-off of a robot project I did, using the same ESP adapter. I have a description of it on a website: software, instructions, "manual" , etc.(**) And I thought: if an Arduino based robot can do wifi, then so can an MSX ;-). For now, it is not at all robust, but it seems feasible to make it a usable interface with some effort (maybe using a highspeed PiC for serial communication, such as the 18F4520).

(*) More info on NodeMCU: https://nodemcu.readthedocs.io/en/master/
(**) Leaphy Robot (in Dutch): http://bliekiepedia.nl/yarh/DroMoRobo/Artikelen/2018/2/28_We...

By zett

Hero (571)

zett's picture

07-10-2018, 09:06

oww nice.