[Coco] Another MPI on fleabay

[RETRO Innovations]

On 3/17/2015 12:07 AM, Kip Koon wrote:
> Hi Jim,
> I mean Kipper SBC v1
*I* think it is solid, but then again, I can afford to be wrong for 5 
boards or so.  So, if you're not completely satisfied with it, I'd 
breadboard it.  Send the schematic to Gene, and have him look over the 
decoding to see if I missed anything.

2 things I think need to be checked:

6850 active high inputs should be tied to Vcc, or you can use the spare 
'266 as an inverter and put A11 into one of them.  That lowers down the 
decode a bit.
The RS232 header should match those USB doohickeys on eBay, as that's 
the way to go.  I don't think you can even buy a MAX232 and caps for 
$.99, and if you bought them in bulk, I bet you could just kit them into 
the purchase.


Jim