1
0
mirror of https://github.com/cc65/cc65.git synced 2024-11-18 00:07:21 +00:00
cc65/libsrc/cbm510/banking.s

40 lines
616 B
ArmAsm
Raw Normal View History

;
; Ullrich von Bassewitz, 28.09.1998
;
2018-08-14 13:54:57 +00:00
; Banking routines for the 510.
;
.export set_bank, sys_bank, restore_bank
.importzp ptr1, segsave
.include "cbm510.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