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| Code Block | ||||
|---|---|---|---|---|
| ||||
RST 20H, DEFB $8A IN: A = 1, for fast bank switching DE = address to copy fast bank code into HL = 0, for code to terminate with RET HL <> 0, for code to terminate with JP (HL) C = segment for bank switching (MS_Sx) OUT: Fc = 0 A = code size Registers changed after return: ..BCDEHL/IXIY same AF....../.... different |
The OS_Fc fast bank switching code has now been established. Subsequent calls to OS_Fc with:
| Code Block | ||
|---|---|---|
| ||
IN:
A = bank to bind to segment specified by OS_Fc initialization
OUT:
AFBCDEHL/IXIY/afbcdehl same
......../..../........ different |
OS_Fc has only been implemented with the above bank switching routine.
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