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42 lines
437 B
ArmAsm
42 lines
437 B
ArmAsm
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; Ullrich von Bassewitz, 13.09.2001
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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
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.include "zeropage.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 IndSegSave
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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 IndSegSave
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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 IndSegSave
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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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