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40 lines
616 B
ArmAsm
40 lines
616 B
ArmAsm
;
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; Ullrich von Bassewitz, 28.09.1998
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; Banking routines for the 510.
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;
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.export set_bank, sys_bank, restore_bank
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.importzp ptr1, segsave
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.include "cbm510.inc"
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.code
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.proc sys_bank
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pha
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lda IndReg
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sta segsave
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lda #$0F
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sta IndReg
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pla
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rts
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.endproc
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.proc set_bank
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pha
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lda IndReg
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sta segsave
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pla
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sta IndReg
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rts
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.endproc
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.proc restore_bank
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pha
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lda segsave
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sta IndReg
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pla
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rts
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.endproc
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