Post by enterapx on Feb 1, 2023 16:07:53 GMT
Good day.
Recently I've decided to upgrade my 64NIC+ cartridge with custom build ROM image. 64NIC+ has socket for custom ROM/EPROM build in. I used AM27C512 chip, which is standard 64KB, DIP 28 EPROM, and programmed it by 64KB ROM image composed from 4x16KB CRT cartridge images. Unfortunately this doesn't work.
I've tried with big and little endian mode ROM variations. I also set apropriately JP4 for DIP 28 chip and checked all possible positions of rotary switch, plus lower Jp3/Jp2 (64/128 mode) switch.
Literally nothing.
Any sugestions? Do somebody have ready to burn 64KB ROM image, which is used with subject 64NIC+ cart?
Many thanks in advance for support.
Recently I've decided to upgrade my 64NIC+ cartridge with custom build ROM image. 64NIC+ has socket for custom ROM/EPROM build in. I used AM27C512 chip, which is standard 64KB, DIP 28 EPROM, and programmed it by 64KB ROM image composed from 4x16KB CRT cartridge images. Unfortunately this doesn't work.
I've tried with big and little endian mode ROM variations. I also set apropriately JP4 for DIP 28 chip and checked all possible positions of rotary switch, plus lower Jp3/Jp2 (64/128 mode) switch.
Literally nothing.
Any sugestions? Do somebody have ready to burn 64KB ROM image, which is used with subject 64NIC+ cart?
Many thanks in advance for support.
