File: clock.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 (31 lines) | stat: -rw-r--r-- 596 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
 
;
; clock.s
;
; Written by Groepaz/Hitmen <groepaz@gmx.net>
; Cleanup by Ullrich von Bassewitz <uz@cc65.org>
; 2003-05-02, Greg King <gngking@erols.com>
;
; #include <time.h>
;
; clock_t clock (void);
;

        .include "nes.inc"

        .export         _clock
        .importzp       sreg


.proc   _clock

        ldy     #0              ; High word is always zero
        sty     sreg+1
        sty     sreg
L1:     ldx     tickcount+1
        lda     tickcount
        cpx     tickcount+1     ; Did tickcount change?
        bne     L1              ; Yes, re-read it
        rts

.endproc