File: videomode.s

package info (click to toggle)
cc65 2.19-2
  • links: PTS
  • area: main
  • in suites: forky, sid, trixie
  • size: 20,268 kB
  • sloc: ansic: 117,151; asm: 66,339; pascal: 4,248; makefile: 1,009; perl: 607
file content (34 lines) | stat: -rw-r--r-- 807 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
 
;
; Ullrich von Bassewitz, 2009-09-07
;
; unsigned __fastcall__ videomode (unsigned Mode);
; /* Set the video mode, return the old mode */
;

        .export         _videomode
        .import         SWAPPER, BSOUT

        .include        "c128.inc"


.proc   _videomode

        cmp     MODE                    ; Do we have this mode already?
        beq     @L9

        lda     MODE                    ; Get current mode ...
        pha                             ; ... and save it

        jsr     SWAPPER                 ; Toggle the mode
        lda     #14
        jsr     BSOUT                   ; Switch to lower case chars

        pla                             ; Get old mode into A

; Done, old mode is in A

@L9:    ldx     #$00                    ; Clear high byte
        rts

.endproc