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cc65/libsrc/tgi/tgi_init.s
cuz 579e1ae267 TGI Implementation
git-svn-id: svn://svn.cc65.org/cc65/trunk@1315 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-06-21 16:25:56 +00:00

26 lines
797 B
ArmAsm

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