Re: What card is this?

[david@uow.edu.au (David Wilson)]

martin.w6@ukonline.co.uk (Martin Wilson) writes:
>branded AIO
>dated 1979 revision 3
>9 chips, 2 of which are major ones (6821 and 6850)

6821 = PIA = 2x 8 bit ports + 4 control lines
6850 = ACIA = 1x serial port

>blue pcb with rotary control for baud settings
>2 connectors for cables
>Is it a twin serial interface or serial and parallel?

Sounds like the latter. I have a similar printer card with both
serial and parallel ports - you select which one to use with
jumpers etc.

>Would it be GS compatible?

Could be. Have to see the ROM dump to tell. If it is relatively
up to date (BASIC & Pascal 1.1 entry points) I see no reason
for it not to work.

>I'm really hoping its a printer interface and that it will
>be compatible

It certainly could be.
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia  david@uow.edu.au