cc65/libsrc/cbm610/banking.s

42 lines
618 B
ArmAsm

;
; Ullrich von Bassewitz, 28.09.1998
;
; Banking routines for the 610.
;
.export set_bank, sys_bank, restore_bank
.importzp ptr1, segsave
.include "cbm610.inc"
.code
.proc sys_bank
pha
lda IndReg
sta segsave
lda #$0F
sta IndReg
pla
rts
.endproc
.proc set_bank
pha
lda IndReg
sta segsave
pla
sta IndReg
rts
.endproc
.proc restore_bank
pha
lda segsave
sta IndReg
pla
rts
.endproc