Re: Apple ][gs as dumb terminal

[dempson@actrix.gen.nz (David Empson)]

In article <Pine.3.07.9407242332.A5608-b100000@acme.freenet.columbus.oh.us>,
Dave Althoff <dalloff@freenet.columbus.oh.us> wrote:
> 
> Several points to consider here.
> 
> First of all, I believe the ][gs serial port emulates the Super Serial
> Card.

To some extent, yes.  It isn't identical, certainly not in hardware,
and there are many differences in software too.

> Therefore, in order to get the port firmware to echo through the
> 80-column display, you may need to issue a ^A3S command.  This is
> necessary on a ][e; I'm not sure on a IIgs.

It isn't supported by the IIgs serial firmware, and it isn't needed.

You can just do a PR#3 then an IN#2, and you get 80-column screen
output with full control of the serial firmware.

The 80-column escape sequences won't work, but screen output is fine.

You can also do PR#3 then PR#2, which allows you to use 80-column
escape sequences, but some serial firmware commands (such as enabling
terminal mode) only work if you've done an IN#2.

The IIgs COUT1 routine fully supports 80-column screen output (it
autodetects whether 80-column video output is active.  As long as the
slot 3 screen holes and page zero locations are set up properly (by
the PR#3), COUT1 will continue to generate 80-column output even if
you do a PR#0.

The IIe isn't quite as flexible.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand