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26 lines
797 B
ArmAsm
26 lines
797 B
ArmAsm
;
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; Ullrich von Bassewitz, 21.06.2002
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;
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; void __fastcall__ tgi_init (unsigned char mode);
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; /* Initialize the given graphics mode. */
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.include "tgi-kernel.inc"
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.include "tgi-error.inc"
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.import _tgi_done
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.export _tgi_init
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_tgi_init:
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pha ; Save mode
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jsr _tgi_done ; Switch off graphics if needed
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pla
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sta _tgi_mode ; Remember the mode
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jsr tgi_init ; Go into graphics mode
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jsr tgi_fetch_error ; Get the error code
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beq @L1 ; Jump if no error
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lda #$00
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sta _tgi_mode ; Clear the mode if init was not successful
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@L1: rts
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