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13482984ca
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.
48 lines
855 B
ArmAsm
48 lines
855 B
ArmAsm
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; Maciej 'YTM/Elysium' Witkowiak
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; 27.10.2001
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; 06.03.2002
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; void gotox (unsigned char x);
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; void gotoy (unsigned char y);
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; void gotoxy (unsigned char x, unsigned char y);
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.export _gotox, _gotoy, gotoxy, _gotoxy, fixcursor
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.import popa
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.importzp cursor_x, cursor_y, cursor_c, cursor_r
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.include "jumptab.inc"
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_gotox:
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sta cursor_c
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jmp fixcursor
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_gotoy:
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sta cursor_r
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jmp fixcursor
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gotoxy:
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jsr popa
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_gotoxy:
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sta cursor_r
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jsr popa
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sta cursor_c
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; convert 8x8 x/y coordinates to GEOS hires
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fixcursor:
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lda cursor_c
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sta cursor_x
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lda #0
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sta cursor_x+1
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ldx #cursor_x
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ldy #3
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jsr DShiftLeft
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lda cursor_r
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asl a
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asl a
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asl a
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sta cursor_y
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rts
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