Official Name: SetFlashLowerBound
BCALL Address: 80CF
This B_CALL sets the lower flash page executution boundary.
A=Value to write to Port 23. Interrupts should be disabled.
This B_CALL writes the value in A to Port 23. The code is located on page 3Fh/7Fh. Flash must be unlocked before calling this entry point.
SetFlashLowerBound: nop nop im 1 di out (23h),a di ret