Int 63 Function 02 - Get Single Physical Page's Mapping State
- Input: AH = 02h
AL = Physical page#, 0, 4, 5, 6, 7, 8, 9, 0Ah, or 0Bh.
- Output: AH = Completion status
00h Success (No Error)
8Bh Error - Invalid AL
BX = Logical page# currently mapped to specified physical page.
DX = Device select code of logical page mapped to the specified physical page.
- Error conditions: AH non-zero (See above)
- Registers modified: AH, BX, DX
This function does not support attribute versus common memory. Its primary usage is by the built-in System Manager to access System ROM.
BX = FFFFh indicates that the physical page is currently unmapped.