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Streamlined clock rate handling.

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* Docs say that CLK_TCK is an obsolete alias of CLOCKS_PER_SEC so there's no point in individual definitions.
* All targets determining the clock rate at runtime can use a common handling.
This commit is contained in:
Oliver Schmidt
2020-10-25 14:06:44 +01:00
parent 07cc6a3d20
commit f723147f04
4 changed files with 24 additions and 45 deletions
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8
libsrc/atari/clock.s
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@@ -3,7 +3,7 @@
; originally by Ullrich von Bassewitz and Sidney Cadot
;
; clock_t clock (void);
; unsigned _clocks_per_sec (void);
; clock_t _clocks_per_sec (void);
;
.export _clock, __clocks_per_sec
@@ -30,8 +30,10 @@
.proc __clocks_per_sec
ldx #$00 ; Clear high byte of return value
lda PAL ; use hw register, PALNTS is only supported on XL/XE ROM
ldx #$00 ; Clear byte 1 of return value
stx sreg ; Clear byte 2 of return value
stx sreg+1 ; Clear byte 3 of return value
lda PAL ; Use hw register, PALNTS is only supported on XL/XE ROM
and #$0e
bne @NTSC
lda #50