[Coco] POKE for WIDTH 80 ?
spereira1952 at comcast.net
Sat Nov 5 14:47:38 EDT 2016
Thanks very much for your idea, Tim. Actually, I am looking for a POKE, because I can perform that type of operation out of FORTH. I found that I can put the value 0 into memory location &HFFD9 while I am in FORTH, and it operates the same as POKE &HFFD9,0 from DECB (CoCo 3 high speed POKE).
I’ll take a look at those routines in “Super Extended Color BASIC Unravelled” and I’ll figure out if I can use the subroutines or just do the same thing the subroutines do in FORTH.
Stephen M. Pereira
Bedford, NH 03110
> On Nov 5, 2016, at 2:22 PM, tim lindner <tlindner at macmess.org> wrote:
> On Sat, Nov 5, 2016 at 10:58 AM, Stephen Pereira
> <spereira1952 at comcast.net> wrote:
>> I’ve been pouring through the “500 PEEKS, POKES and EXECS,” but I’ve not been able to find if there is a POKE that works the same as the WIDTH 80 command. Does anyone know if there is such a POKE? If so, what is it, please, and also the opposite POKE to get back to “normal” WIDTH 32.
> That book was written before the CoCo 3 was released. I know of no
> POKE to do it, but...
> I just looked in "Super Extended Color BAISC Unravelled".
> I searched for "WIDTH". I found a subroutine at $F679 that sets 80 column mode
> One at $F65C that sets 40 column mode.
> And one at $F652 that sets 32 column mode.
> All three of these routines finish with an RTS instruction. I believe
> that makes them safe to use EXEC (from BASIC) with.
> tim lindner
> "Proper User Policy apparently means Simon Says."
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