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