[Coco] USB to serial cable

Arthur Flexser flexser at fiu.edu
Tue Jun 18 17:08:42 EDT 2013


There's actually a shorter way to disable the CD check that requires
just 4 pokes and doesn't need a ROM-to-RAM copy routine:

POKE &HFF23,&H30
POKE &HFF22,&HF9
POKE &HFF23,&H34
POKE &HFF22,0

This reprograms the PIA bit for CD detection to be an output rather
than an input, and then sets the bit to the proper value so that the
CoCo always sees CD as present..

Art

On Tue, Jun 18, 2013 at 5:34 PM, Bill <cwgordon at carolina.rr.com> wrote:
> Well, guess what?? It works!!
>
> Here is my little program:
> 0 ' PUT IN ALLRAM MODE
> 1 RESTORE:FOR I=3584 TO 3584+24:READ A:POKE I,A:NEXT:EXEC 3584
> 2 DATA
> 26,80,142,128,0,166,132,183,255,223,167,128,140,224,0,39,5,183,255,222,32,23
> 9,28,175,57
> 10 POKE &HA2C7,36
> 20 POKE &HA2F7,36
> 30 POKE &H96,1
> 40 PRINT #-2,"HI THERE"
>
> So now I know that my usb-serial cable works. NOW, is there a way to talk to
> the Coco from the PC? Remembering it's a direct connection and no drives or
> cassette.
>
> Thanks
>
>
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