<I have so many TTL's and LSI's and some VLSI's, CPU's of all <kinds (intel, Zilog and others), memories, different crystrals and <oscillators. Should it be single board with everything on it in <stages or do it modular via cards? Check the www.psyber.com/~tcj, there is a lot of info and back issues are available. <SRAM or DRAM? With dense srams (2 62256s is 64k!) that is an easy choice for small memories (64->128k). There are designs out ther ethat are 3.5" foot print and work well with 3.5" floppies and IDE or scsi drives. Allison