[Coco] Model III bus pinout

[Willard Goosey]

I spent a good hour digging through a Model 4 tech ref for this:

xa0 - 17
xa1 - 19
xa2 - 21
xa3 - 23
xa4 - 25
xa5 - 27
xa6 - 29
xa7 - 31
xd0 - 1
xd1 - 3
xd2 - 5
xd3 - 7
xd4 - 9
xd5 - 11
xd6 - 13
xd7 - 15
extiosel* - 43
xin* - 33
xout* - 35
xreset* - 37
xmi* - 47(?)
xorq* - 49
xiobuswait* - 41
xiobusint* - 39
nc - 45
gnd - 8-50 even

As you can see, it's an expansion bus, it's not SASI or SCSI, dispite
the fact that it's a 50-pin ribbon cable connector.

Sheesh!  Next you'll wanna hook 8" floppy drives to your SCSI cards,
just 'coz they use the same connector.

Willard
-- 
Willard Goosey  goosey at sdc.org
Socorro, New Mexico, USA
"I've never been to Contempt!  Isn't that somewhere in New Mexico?"
   --- Yacko