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30 lines
637 B
ArmAsm
30 lines
637 B
ArmAsm
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; 2016-02-28, Groepaz
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; 2017-06-19, Greg King
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; unsigned char cpeekrevers (void);
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;
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.export _cpeekrevers
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.import plot
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.import CURS_X: zp, CharPtr: zp
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.include "cbm610.inc"
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_cpeekrevers:
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ldx IndReg
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ldy #$0F
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sty IndReg
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ldy CURS_X
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lda (CharPtr),y ; get char from system bank
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stx IndReg
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ldx #>$0000
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and #$80 ; get reverse bit
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asl a
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tax ; ldx #>$0000
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rol a ; return boolean value
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rts
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