[j4_james]

The author mentions problems with flow control, but I'm fairly certain I got that working in MAME. If I remember correctly, you need to enable XON/XOFF in the VT102 configuration (it's one of the bits you can toggle on the SET-UP B page), and also enable it in MAME's Machine Configuration menu.

Also make sure your modem settings in MAME match the settings configured on the VT102. I have them both set to 19200 baud 8N1. I've just done a quick test now, and I can definitely make it through tests 1 and 2 in vttest without the output getting corrupted.

I should also mention that I've got the RS232 device set to null_modem (which is hooked up to a socat instance via MAME's bitbanger feature), rather than the pty configuration that they're using. I'm not sure if that could make a difference to the way the flow control works.