[sdiy] PCB digital signal layout question

[grant at musictechnologiesgroup.com]

[My attempts to reply have been failing]

Thanks for the helpful info. The speed is even slower than that. It's
the actual drum machine sound ROMs I'm working with, so more like 20 or
30 kHz, but it's multiplexed sounds (for lack of a better term ... more
like the single-DAC Drumulator and less like the multiple-DAC
Linn/OB/etc) so it is probably accessed much faster. At some point early
on I'll put the target device on the scope and double check. I can think
of a few machines that use code space for the sound data (360 MidiBass
for example), so that one is about 1 MHz.

Yeah I'm not sure if the ribbon cable or socket-with-long-pins is best,
but I don't have a lot of vertical room. Plus I don't like sticking pins
into a chip socket that are dramatically different than chip pins. My
pet peeve is the E! expansion that uses fat square 0.1" headers. Might
as well be shoving wire-wrap pins in there. You're practically buggering
the original socket. ;-)



GB