Re: Accessing 80-column mode from CP/M

[pausch@saaf.se (Paul Schlyter)]

In article <ikkl5ukogoa4rrmqq868edbng74jr5261q@4ax.com>,
Celt  <reply@this.newsgroup> wrote:
>Any ideas from how I tell CP/M software to use an 80 column card?
>Display is 40 col from motherboard, all I get from 80 col card is a
>blinking cursor.
>
>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.

You don't tell CP/M software to use 80-col cards, you tell CP/M itself to
use it.  And you don't evne need to tell CP/M this, because CP/M
detects the presence of an 80-col card automatically and uses it if it's
present.  You must put the 80-col card in slot 3 of course.

CP/M was able to recognize only a limited number of 80-column cards
of course - so it's possible your 80-col card is of a kind that
your CP/M is not familiar with.



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