Official Name: Chk_Batt_Low
BCALL Address: 50B3,50B6,80F0,80F3
Check the batteries.
- Z=1: Batteries are low
- Z=0: Batteries are good
This is not just checking bit 0 of port 2. It puts the calculator into a special mode, creates a delay, polls bit 0 of port 2, and puts the calculator back to normal. BCALLing 50B6 is slightly different from 50B3 because a small delay is done before the routine. BCALLs 80F0 and 80F3 are the boot page versions of these routines.
B_CALL Chk_Batt_Low ret z B_CALL ChkFindSym ret c ld a,b or a ret nz AppOnErr errHand B_CALL Arc_Unarc AppOffErr errHand: ret