mirror of https://github.com/cc65/cc65.git
85 lines
1.8 KiB
ArmAsm
85 lines
1.8 KiB
ArmAsm
;
|
|
; Oliver Schmidt, 16.8.2018
|
|
;
|
|
; int __fastcall__ clock_settime (clockid_t clk_id, const struct timespec *tp);
|
|
;
|
|
|
|
.include "time.inc"
|
|
.include "c64.inc"
|
|
|
|
.importzp sreg, ptr1
|
|
.import pushax, pusheax, ldax0sp, ldeaxidx
|
|
.import tosdiveax, incsp3, return0
|
|
.import TM, load_tenth
|
|
|
|
|
|
;----------------------------------------------------------------------------
|
|
.code
|
|
|
|
.proc _clock_settime
|
|
|
|
jsr pushax
|
|
|
|
.assert timespec::tv_sec = 0, error
|
|
jsr _localtime
|
|
sta ptr1
|
|
stx ptr1+1
|
|
ldy #.sizeof(tm)-1
|
|
@L1: lda (ptr1),y
|
|
sta TM,y
|
|
dey
|
|
bpl @L1
|
|
|
|
lda TM + tm::tm_hour
|
|
jsr dec2BCD
|
|
tax ; Force flags
|
|
bne @L2
|
|
lda #$92 ; 12 AM
|
|
bne @L3
|
|
@L2: cmp #$13 ; 1 PM
|
|
bcc @L3
|
|
sed
|
|
sbc #$12
|
|
cld
|
|
ora #%10000000
|
|
@L3: sta CIA1_TODHR
|
|
lda TM + tm::tm_min
|
|
jsr dec2BCD
|
|
sta CIA1_TODMIN
|
|
lda TM + tm::tm_sec
|
|
jsr dec2BCD
|
|
sta CIA1_TODSEC
|
|
|
|
jsr ldax0sp
|
|
ldy #3+timespec::tv_nsec
|
|
jsr ldeaxidx
|
|
jsr pusheax
|
|
jsr load_tenth
|
|
jsr tosdiveax
|
|
sta CIA1_TOD10
|
|
|
|
jsr incsp3
|
|
jmp return0
|
|
|
|
.endproc
|
|
|
|
;----------------------------------------------------------------------------
|
|
; Just sum up the value in BCD mode.
|
|
; http://forum.6502.org/viewtopic.php?p=7629#p7629
|
|
|
|
.proc dec2BCD
|
|
|
|
tax
|
|
dex
|
|
bmi @L9
|
|
lda #0
|
|
clc
|
|
sed
|
|
@L1: adc #1
|
|
dex
|
|
bpl @L1
|
|
cld
|
|
@L9: rts
|
|
|
|
.endproc
|