MicroCoreLabs
Experienced Member
- Joined
- Feb 12, 2016
- Messages
- 283
I was considering a relatively simple project in which 100% of the memory (both RAM and ROM) was on a single ISA card with a micro controller responding to these address ranges. This way, a non-functional motherboard could possibly be brought back to life if the fault was either with the RAM, ROM, or one of the associated control or data path ICs. The micro has more than enough memory and speed to support tho whole 640KB plus ROM images... It would be similar to my EPROM emulator project, except ISA-slot based and supporting more memory.
The only complication would be how to disable the on-board data buffers for the RAM/ROM... One thought could be to socket the associated motherboard ICs and not populate them when using this card. Another could be to simply cut the buffer direction pin(s)... Something would need to be done to keep the motherboard buffers from conflicting with the All-Memory ISA card... Maybe someone has a better solution...
Could possibly add a few ICs to implement XT-IDE as well.. or connectors for serial/parallel to match the AST six-pack functionality...
Just brainstorming... There are a number of non-functional motherboards out there whose users are unable to debug which may end up scrapped. If there was a board which replaced the functionality of all off the motherboard's memory components, it could bring these systems back to life.
The only complication would be how to disable the on-board data buffers for the RAM/ROM... One thought could be to socket the associated motherboard ICs and not populate them when using this card. Another could be to simply cut the buffer direction pin(s)... Something would need to be done to keep the motherboard buffers from conflicting with the All-Memory ISA card... Maybe someone has a better solution...
Could possibly add a few ICs to implement XT-IDE as well.. or connectors for serial/parallel to match the AST six-pack functionality...
Just brainstorming... There are a number of non-functional motherboards out there whose users are unable to debug which may end up scrapped. If there was a board which replaced the functionality of all off the motherboard's memory components, it could bring these systems back to life.