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Re: Accessing 80-column mode from CP/M



 

Jonathan Adams wrote:

: >>
: >>No switches or id on 80 col card; it has 3 EPROM sockets,
: >>but only ROM2 & ROM3 are present. No reason why ROM1 should
: >>have been removed, so I'm hoping it was an option.
: >

I have the same sort of card. Can someone ID the missing EPROM for me?
There are two terminals on the front of the card which are not being used,
and I think that they might be used for a 40 column pass-through port. I
also think that the missing chip may have something to do with this.


I haven't been following this thread but a lage percentage of the A2
videocards were clones of a sort of the Videx Videoterm. Probably
all of the ones with 3 EPROMs. There's a pdf of the videx manual
on my website that might be of some help at
http://homepage.mac.com/WebObjects/FileSharing.woa/wa/default?user=waynes&templatefn=FileSharing.html&aff=consumer&cty=US&lang=en
 

    Wayne