mirror of https://github.com/cc65/cc65.git
65 lines
2.1 KiB
ArmAsm
65 lines
2.1 KiB
ArmAsm
;
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; Ullrich von Bassewitz, 13.09.2001
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;
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.export _textcolor, _bgcolor, _bordercolor
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.import sys_bank, restore_bank
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.import vic: zp, CHARCOLOR: zp
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.include "cbm510.inc"
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ textcolor (unsigned char color);
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; /* Set the color for text output. The old color setting is returned. */
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;
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.proc _textcolor
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ldx CHARCOLOR ; get old value
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sta CHARCOLOR ; set new value
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txa
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rts
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.endproc
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ bgcolor (unsigned char color);
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; /* Set the color for the background. The old color setting is returned. */
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;
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.proc _bgcolor
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jsr sys_bank ; Switch to the system bank
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pha ; Save new color
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ldy #VIC_BG_COLOR0
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lda (vic),y ; Get current color...
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tax ; ...into X
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pla ; Get new color
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sta (vic),y ; Set new color
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txa ; Get old color into X
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jmp restore_bank ; Restore the old color
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.endproc
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; ------------------------------------------------------------------------
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; unsigned char __fastcall__ bordercolor (unsigned char color);
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; /* Set the color for the border. The old color setting is returned. */
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.proc _bordercolor
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jsr sys_bank ; Switch to the system bank
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pha ; Save new color
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ldy #VIC_BORDERCOLOR
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lda (vic),y ; Get current color...
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tax ; ...into X
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pla ; Get new color
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sta (vic),y ; Set new color
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txa ; Get old color into X
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jmp restore_bank ; Restore the old color
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.endproc
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