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; 2018-04-13, Jede (jede@oric.org)
;
; void cputc (char c);
;
.export _cputc, CHARCOLOR, OLD_CHARCOLOR, BGCOLOR, OLD_BGCOLOR
.include "telestrat.inc"
.proc _cputc
ldx CHARCOLOR
cpx OLD_CHARCOLOR
beq do_not_change_color_foreground
stx OLD_CHARCOLOR ; Store CHARCOLOR into OLD_CHARCOLOR
dec SCRX
dec SCRX
pha
txa ; Swap X to A because, X contains CHARCOLOR
BRK_TELEMON XFWR ; Change color on the screen (foreground)
inc SCRX
pla
do_not_change_color_foreground:
ldx BGCOLOR
cpx OLD_BGCOLOR
beq do_not_change_color
stx OLD_BGCOLOR
dec SCRX ; Dec SCRX in order to place attribute before the right position
pha
txa ; Swap X to A because, X contains BGCOLOR
ORA #%00010000 ; Add 16 because background color is an attribute between 16 and 23. 17 is red background for example
BRK_TELEMON XFWR ; Change color on the screen (background)
pla
do_not_change_color:
BRK_TELEMON XFWR ; Macro send char to screen (channel 0)
rts
.endproc
.bss
CHARCOLOR:
.res 1
OLD_CHARCOLOR:
.res 1
BGCOLOR:
.res 1
OLD_BGCOLOR:
.res 1
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