home *** CD-ROM | disk | FTP | other *** search
- ; This source file is part of the LynxLib miscellaneous library by
- ; Robert Fischer, and is Copyright 1990 by Robert Fischer. It costs no
- ; money, and you may not make money off of it, but you may redistribute
- ; it. It comes with ABSOLUTELY NO WARRANTY. See the file LYNXLIB.DOC
- ; for more details.
- ; To contact the author:
- ; Robert Fischer \\80 Killdeer Rd \\Hamden, CT 06517 USA
- ; (203) 288-9599 fischer-robert@cs.yale.edu
-
- ; Stuff having to do with clocking
- ; By Robert Fischer, January 17, 1988
- .include "atari.s"
-
- .globl _read_clock
- .globl _wait
-
- _read_clock:
- clr.l -(sp) ; Supervisor Mode
- move.w #$20,-(sp)
- trap #GEMDOS
- addq #6,sp
-
- move.l _hz_200, -(sp)
-
- move.l d0,-(sp) ; User mode
- move.w #$20,-(sp)
- trap #GEMDOS
- addq #6,sp
-
- move.l (sp)+, d0
- rts
-
-
- _wait: .cargs .delay.w
- move.l d4, -(sp) ; Save Registers
-
- bsr _read_clock
- move.w .delay+4(sp), d4
- ext.l d4
- add.l d0, d4
-
- waitloop:
- bsr _read_clock
- cmp.l d0, d4
- bpl waitloop
-
- move.l (sp)+, d4
- rts
-