Let's see - if you wanted to emulate early S-100 stuff, I guess this'd be the way that it'd go: 1. Find an ad in the back of a 1975-1978 BYTE magazine for a neat memory board. 2. Place order for board. 3. Begin assembling board. Supplier gives you low-grade chips; you must test all 2102's by hand before installing. 4. Plug board into system. Front panel freezes up. 5. Hack around the front panel, changing RC constants in one-shots. 6. Discover you have to cut a couple traces on your CPU board, wire in some JK Flip-Flops to synchronize the timing to what the memory board expects. 7. Congratulations! After months of time, and weeks of effort, you now have enough memory to play Trek under MBASIC! OK, OK, I'm exaggerating a little bit. By the late 70's there were some pretty solid S-100 based systems out there, if you were willing to spend the bucks to get the good stuff (i.e. Godbout/Compupro/Cromemco/usw.) But if you played it cheap, you got what you paid for! Tim.