Doom / Race Drivin' - Null modem linked machines in MAME

Channel:

Bob Zed

Subscribers:

3,640

Published on October 9, 2021 10:00:05 PM ● Video Link: https://www.youtube.com/watch?v=KfSKgSfjzxQ

Game:

Race Drivin' (1990)

Duration: 2:01

223 views

9

* DOOM:
I won't explain how to install DOS then DOOM on this driver here. Take a look at: https://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=86865

The command line should declare the null modem cable like this:

mame ct486 -board2:comat:serport0 null_modem -bitb socket.localhost:11185

You can run the same command line twice.

Inside each MAME instances, in "Machine Configuration" menu you must have the values shown in the video:
Flow Control: OFF
Data Bits: 8
Parity: None
RX Baud: 14400
Stop bits: 1
TX Baud: 14400

Then you can run DOOM has shown in the video.


* Race Drivin':

You have to had different "cfg" and "nvram" directory for both instances:

mame racedriv -cfg_directory cfg1 -nvram_directory nvram1 -mainpcb:rs232 null_modem -bitb socket.localhost:11185

mame racedriv -cfg_directory cfg2 -nvram_directory nvram2 -mainpcb:rs232 null_modem -bitb socket.localhost:11185

In game, enter the game's menu (F2 key), go to "Operator Screens". In third screen, called "Game Options", select last item and set one instance as GAME 1 and the other as GAME 2.

Inside each MAME instances, in "Machine Configuration" menu you must have the values shown in the video:
Flow Control: OFF
Data Bits: 8
Parity: None
RX Baud: 38400
Stop bits: 1
TX Baud: 38400


Chapters:
00:00 DOOM
00:56 Race Drivin'

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