[Coco] DW3 and a Chess game

[Robert Gault]

Spencer via Coco wrote:
> Oops forgot the image name:  Chessd.dsk.
>
>

Right, you do make things complicated. :)

The package is not chessd.dsk but
http://www.colorcomputerarchive.com/coco/Disks/Games/ChesSD%20(Software%20Dynamics).zip
That is ChesSD.zip.

So, this game was written to be run on a Coco2 (or maybe a Coco1) with a disk 
system. It will not run on a Coco3. Things get even worse with a Coco3 running 
HDBDOS/RGBDOS where you don't get a good directory listing as the game has code 
in the directory track. The game also seems to be hard coded for floppy drive0.

Since Drivewire 3 or 4 requires a Coco to be using HDBDOS for Drivewire, this 
game will not work without modification. To my knowledge, the source code is not 
available so someone would need to disassemble the program and patch it.

If attempting to run this game has trashed .dsk images on Drivewire or even 
Drivewire itself, that is an accident of attempting to run code that will not 
work with this combination of hardware/software.

If you just want a chess game that will work with Drivewire, you can try Cyrus. 
You will need a loader program to use it with a Coco3.
10 PCLEAR1
20 CLEAR200,&H1FFF
30 LOADM"CYRUS"
40 POKE&H3FF0,253
50 POKE&HFFD9,0
60 PALETTE1,63:PALETTE3,0
70 EXEC

Robert