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About all CONIO functions offering a <...>xy variant call popa _gotoxy By providing an internal gotoxy variant that starts with a popa all those CONIO function can be shortened by 3 bytes. As soon as program calls more than one CONIO function this means an overall code size reduction.
19 lines
562 B
ArmAsm
19 lines
562 B
ArmAsm
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; Ullrich von Bassewitz, 08.08.1998
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; void __fastcall__ cclearxy (unsigned char x, unsigned char y, unsigned char length);
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; void __fastcall__ cclear (unsigned char length);
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;
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.export _cclearxy, _cclear
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.import gotoxy, chlinedirect
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_cclearxy:
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pha ; Save the length
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jsr gotoxy ; Call this one, will pop params
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pla ; Restore the length and run into _cclear
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_cclear:
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ldx #' ' | $80 ; Blank, screen code
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jmp chlinedirect
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