NobodyIsHere
Veteran Member
- Joined
- Dec 21, 2006
- Messages
- 2,410
Hi
It seems like you are describing a ROM drive rather than a FDC. I think it is outside the scope of a robust FDC with BIOS.
Accessing a large ROM would require some sort of paging mechanism like a latch to provide a small 8KB or 32KB "window" into the larger ROM (128KB or larger). It is certainly possible but sounds like another board project rather than something part of XT-FDC. As a result it is a more complex than decoding a simple small ROM and would require its own IO port and associated chips. Maybe that's a follow on project?
Let's see what Chuck has to say. We are still working out how to store configuration data without risk of corrupting the BIOS.
Thanks and have a nice day!
Andrew Lynch
It seems like you are describing a ROM drive rather than a FDC. I think it is outside the scope of a robust FDC with BIOS.
Accessing a large ROM would require some sort of paging mechanism like a latch to provide a small 8KB or 32KB "window" into the larger ROM (128KB or larger). It is certainly possible but sounds like another board project rather than something part of XT-FDC. As a result it is a more complex than decoding a simple small ROM and would require its own IO port and associated chips. Maybe that's a follow on project?
Let's see what Chuck has to say. We are still working out how to store configuration data without risk of corrupting the BIOS.
Thanks and have a nice day!
Andrew Lynch