📄 hal_set_rfim.s51
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#include "iocc2430.h"
MODULE set_rfim.a51
RSEG RCODE
PUBLIC SET_RFIM;
FUNCTION SET_RFIM, 0203H
; Interrupts need to be turned off during this operation
; The old state of EA is saved in R2
SET_RFIM: MOV R2, #01H;
JBC EA, intsTurnedOff;
MOV R2, #00H;
intsTurnedOff:
; Update RFIM
MOV RFIM, R1;
; Bugfix
MOV A, RFIF;
ANL A, RFIM;
JZ done;
MOV S1CON, #03H;
done: ; Put EA back into the old state
MOV A, R2;
MOV C, ACC^0;
MOV EA, C;
RET;
END;
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