83:Ports:02
From WikiTI
Synopsis
Port Number: 02h
Function: ROM and RAM Pager and Memory Map Control
This port controls what page is swapped into the swappable memory range which depends on the current mapping mode.
Read Values
Always the last value written.
Write Values
- Bits 0 to 2: The lower 3 bits of the desired ROM page (bit 3 can be set through bit 4 of the link port)
- Bit 3 controls the memory mapping mode. The default value for this bit is 1.
- Bit 4: Unknown, harmless
- Bit 5: Unknown, harmless
- Bit 6: 0 - the specified ROM page is swapped in, 1 - the RAM page specified by bit 0 swapped in.
- Bit 7 controls the memory mapping mode. The default value for this bit is 1.
Credits and Contributions
- created by CoBB
