Hi all.
i'm find technical information about Xplorer FX3 cheat cartridge
what i know:
ROM 512KB (2x256 KB)
SRAM 128KB
Address space
Registrs:
What don't know:
1) where mapped SRAM
2) if SRAM not mapped initially, then what is register used for a mapping
I can only assume that SRAM is available on the addresses xx040000h-xx05FFFFh, for mapping use bit 4 of register 1F060001h
i'm find technical information about Xplorer FX3 cheat cartridge
what i know:
ROM 512KB (2x256 KB)
SRAM 128KB
Address space
Code:
xx000000h
ROM 256 KB
xx040000h
ROM 128 KB two bank switchable (SRAM?)
xx060000h
Registrs
xx080000h
*xx = 1F, 9F, BF
Registrs:
Code:
1F060000h R/-
bit 0 - ON/OFF switch
1F060001h R/W
read
bit 8-0 - DATA PC Link
write
bit 5 - ROM2 bank switch
bit 3-0 - DATA PC Link
1F060002h R/-
bit 0 - DATA PC Link handshake
What don't know:
1) where mapped SRAM
2) if SRAM not mapped initially, then what is register used for a mapping
I can only assume that SRAM is available on the addresses xx040000h-xx05FFFFh, for mapping use bit 4 of register 1F060001h