Over
here in a thread about the 65816 WhiteFlame mentioned the SuperCPU and this board photo:
Attachment:
3dWH5EM.jpg [ 54.75 KiB | Viewed 6112 times ]
(There's some general product info
here)
BDD pointed out
Quote:
... a 40 MHz clock generator can be seen (a flop somewhere is dividing that to produce a Ø2 clock), but the 65C816 itself is a -14, meaning 14 MHz. I'm not familiar with the SuperCPU's design but do know that it did run reliably at 20 MHz
I note that the above board and other boards on nearby pages have GALs on them, and the more complex boards also use CPLDs.
Here are the related pages
nearby:
CMD SUPER CPU - Tools CMD SUPER CPU - Games SUPER CPU's - History HOW TO: Fix Games to work on SUPER CPU SUPER CPU 64 - Look Inside (the page behind the photo above)
SUPER CPU 128- Look InsideThere's a long thread
on lemon64 which mentions that the GALs have been dumped and the schematics reversed.
There's
a pdf here about a RAM expansion which goes into a little detail about clock-stretching on the SuperCPU (it's a 20MHz CPU on a 1MHz machine, so something must be done for off-board devices!)
There's a
user guide here for the RAM expansion which tells us that the two connectors near the North edge are for that purpose.
The V2 board (
user guide) had 5 microclips which connect to the host machine's CPU - a bit more invasive.
Cheers
Ed
Found a clearer picture (of a different board...) on the lemon64 thread: