Original ROMs — #3 My mistake. I meant to say 27C256, the 32KB EPROM. Two of them for 64K of ROM. Pin 1 on the 27C256 is Vpp, the programming voltage pin which needs to be at 5V for normal ROM read. … 68kMLA Troubleshooting by H3NRY Sat, 14 May 2011 - 04:52
