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both routines fixed (fix by Piotr Fusik)

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1098 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cpg 2001-11-05 23:52:19 +00:00
parent aff228f0dc
commit d10a647baf
1 changed files with 19 additions and 19 deletions
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38
libsrc/atari/clock.s
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@ -1,13 +1,12 @@
;
; Ullrich von Bassewitz, 25.07.2000
;
; Implemented using information from Sidney Cadot <sidney@janis.pds.twi.tudelft.nl>
; Piotr Fusik, 04.11.2001
; originally by Ullrich von Bassewitz and Sidney Cadot
;
; clock_t clock (void);
; unsigned _clocks_per_sec (void);
;
.export _clock, __clocks_per_sec
.export _clock, __clocks_per_sec
.importzp sreg
.include "atari.inc"
@ -15,15 +14,15 @@
.proc _clock
lda #0 ; Byte 3 is always zero
sta sreg+1
php ; Save current I flag value
sei ; Disable interrupts
lda RTCLOK ; Read clock
ldx #5 ; Synchronize with Antic, so the interrupt won't change RTCLOK
stx WSYNC ; while we're reading it. The synchronization is done same as
@L1: dex ; in SETVBLV function in Atari OS.
bne @L1
stx sreg+1 ; Byte 3 is always zero
lda RTCLOK+2
ldx RTCLOK+1
ldy RTCLOK+2
plp ; Restore old I bit
sty sreg
ldy RTCLOK
sty sreg
rts
.endproc
@ -31,13 +30,14 @@
.proc __clocks_per_sec
lda #50 ; Assume PAL
ldx PAL ; use hw register, PALNTS is only supported on XL/XE ROM
beq @L1
ldx #0
lda PAL ; use hw register, PALNTS is only supported on XL/XE ROM
and #$0e
bne @NTSC
tax
lda #50
rts
@NTSC: ldx #0
lda #60
@L1: rts
rts
.endproc