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cc65/libsrc/cbm/c_save.s
cuz 6d498d8187 Use external symbols for the CBM kernal jump table functions. This allows
to emulate these functions on platforms where one or more of these functions
are not available (PET, CBM-II).


git-svn-id: svn://svn.cc65.org/cc65/trunk@1544 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-11-19 23:02:47 +00:00

26 lines
599 B
ArmAsm

;
; Marc 'BlackJack' Rintsch, 11.06.1999
;
; unsigned char __fastcall__ cbm_k_save(unsigned int start, unsigned int end);
;
.export _cbm_k_save
.import SAVE
.import popax
.importzp ptr1, tmp1
_cbm_k_save:
sta tmp1 ; store end address
stx tmp1+1
jsr popax ; pop start address
sta ptr1
stx ptr1+1
lda #ptr1
ldx tmp1
ldy tmp1+1
jsr SAVE
bcs @NotOk
lda #0
@NotOk: rts