Thursday, February 25, 2010

Monday, February 1, 2010

Ultimate 2532(or 2352) PROM MegaCart!!! ... kinda



While visiting my favorite local Electronics Surplus Store I came across this odd 24 pin fake IC to IC cable, which gave me a cool idea. One very common (and boring) tasks in my line of work is doing adapters to run ROMs (custom and whatnot) on the real hardware for analysis. This setup makes it pretty easy (and solderless) to try stuff around, especially difference in CPU<->BUS<->ROM handshaking signals like !CS !CE, !E whatever, and also configuration of adress lines.

Systems that typically use such 24pin ROMs include
VIC-20
ATARI 2600
MPT-03 - Arcadia 2001 clone(pictured)
Odyssey2

This particular breadbreadboard setup allows me to quickly "audition" up to 16 different 4KB Arcadia ROMs using DIP switches.