Hi Dan,

I am using the same exact chip. I ran into the same problem at first. It was caused by not mapping the memory correctly. What ram device are you using and how is it connected? I am using the 62256 ram chip. CE is connected currently to a 74LS138 decoder at address 0000h. A15, 14, and 13 are connected to C,B,A in same order. G1 connected to 5V G2A and G2B connect to ground. Before I used the decoder chip I just hooked CE of the ram to A15. Either way gives me 32???K of memory. Let me know if you need more help. I still need help using the PROG command!

TTYL,
Dave Kaleta