[Coco] Anyone try an 80x28 text screen on a CoCo3?
Bruce W. Calkins
brucewcalkins at charter.net
Mon Apr 23 09:52:41 EDT 2018
My RGB-DOS hard drive equipped CoCo 3 boot included lines to make this
the default. I had also patched OS-9 on that machine for 28 lines.
On 04/23/2018 02:32 AM, Robert Gault wrote:
> Many of you know that the GIME can be set for a max 225 lines on a
screen; the default being 192.
> I've just found a method for patching the ROM so that a WIDTH80
screen now displays 28 lines of text rather than the default 24; 192/8=24.
> Let this be a challenge for you programmers. You also need to realize
that 225/8=28.125 which will give you an extra horizontal scan line.
That needs to be cleared with a CLS from the bottom of the screen.
> I'll see if there is any interest in this and post the answer after
you have a chance to try and solve the challenge.
> I wonder why Tandy decided to use 24 rather than 28 lines of text.
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