[Coco] OS9 68K, MM/1 software and questions

Joel Ewy jcewy at swbell.net
Thu Dec 31 14:19:36 EST 2015

On 12/31/2015 06:39 AM, Mark McDougall wrote:
> On 31/12/2015 3:58 PM, Joel Ewy wrote:
>> Just a few more details off the top of my head.
> I'm starting to get rather interested in this machine. Yet another toy 
> to take my time! ;)
> Definitely interested to know more about the possible kits/rebuilds. 
> Would also be interested in having a crack at a MESS driver if there's 
> enough information floating around!
> Regards,
There should be sufficient information for MESS emulation.  I think that 
what CD-i support there already is in MESS would be a good start.  Most, 
if not all, of the chips in the MM/1 are also in other machines already 
emulated under MESS, and we certainly have the logic equations for the 
PLDs on the I/O board and 8M memory board, as well as schematics.

If you want to read up on the Signetics 66470 VSC, the databook is at 
The MM/1 Technical Manual is available here and elsewhere: 

It's also here, along with more documentation: 

And I believe much of it is on Maltedmedia as well.  Here are some 
things I scanned in 2008: 


More information about the Coco mailing list