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29 lines
683 B
ArmAsm
29 lines
683 B
ArmAsm
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; Christian Groessler, 02-Apr-2019
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; unsigned char __fastcall__ textcolor (unsigned char color);
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; "color" value is a palette index (0..3) or COLOR_xxx value (0..3)
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.export _textcolor
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.import conio_color
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_textcolor:
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; move bits #0 and #1 to bits #6 and #7
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and #3
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clc
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ror a
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ror a
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ror a ; new conio_color value
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ldx conio_color ; get old value
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sta conio_color ; store new value
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txa
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; move bits #6 and #7 to bits #0 and #1
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clc
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rol a
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rol a
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rol a
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ldx #0
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rts
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