MC81F4104 Datasheet, PDF (61/118 Pages) Finechips – ABOV SEMICONDUCTOR

Example: Register save using push and pop instructions.
INTxx :
PUSH A
PUSH X
PUSH Y
;SAVE ACC.
;SAVE X REG.
;SAVE Y REG.
;; interrupt processing ;;
POP Y
POP X
POP A
RETI
;RESTORE Y REG.
;RESTORE X REG.
;RESTORE ACC.
;RETURN
General-purpose register save/restore using push and pop instructions;
MC81F4104
Figure 11-3 Saving/Restoring in Interrupt Routine
October 19, 2009 Ver.1.35
61