On Dec 8, 7:51 pm, mdj <mdj....@gmail.com> wrote: > FWIW, my card has 80ns RAM on it. I imagine someone has swapped the > RAM at some earlier point, 150 is way to slow I just took a look at mine and it has 8x HM50256-15 NMOS DRAM chips (week 50 of 1985). I have not used it in a while but I never noticed any problems. The PALs are a mixture of A & B revs: TW[15]A-Q and TW[234]B-Q.