;setting date,time,clock and alarm-clock
;add sys_settime at servetable as for ex. 22 fcn:
; 22 - SETTING DATE TIME, CLOCK AND ALARM-CLOCK
; ebx =0 - set time ecx - 00SSMMHH
; ebx =1 - set date ecx=00DDMMYY
; ebx =2 - set day of week ecx- 1-7
; ebx =3 - set alarm-clock ecx - 00SSMMHH
; out: 0 -Ok 1 -wrong format 2 -battery low
sys_settime:
mov ecx,eax
cli
mov al,0x0d
out 0x70,al
in al,0x71
bt ax,7
jnc bat_low
cmp ecx,2 ;day of week
jne nosetweek
test ebx,ebx ;test day of week
je wrongtime
cmp ebx,7
ja wrongtime
mov dx,0x70
call startstopclk
dec edx
mov al,6
out dx,al
inc edx
mov al,bl
out dx,al
jmp endsettime
nosetweek: ;set date
cmp ecx,1
jne nosetdate
cmp bl,0x99 ;test year
ja wrongtime
shl ebx,4
cmp bl,0x90
ja wrongtime
cmp bh,0x99 ;test month
ja wrongtime
shr ebx,4
test bh,bh
je wrongtime
cmp bh,0x12
ja wrongtime
shl ebx,8
bswap ebx ;ebx=00YYMMDD
test bl,bl ;test day
je wrongtime
shl ebx,4
cmp bl,0x90
ja wrongtime
shr ebx,4
cmp bh,2 ;February
jne testday
cmp bl,0x29
ja wrongtime
jmp setdate
testday:
cmp bh,8
jb testday1 ;Aug-Dec
bt bx,8
jnc days31
jmp days30
testday1:
bt bx,8 ;Jan-Jul ex.Feb
jnc days30
days31:
cmp bl,0x31
ja wrongtime
jmp setdate
days30:
cmp bl,0x30
ja wrongtime
setdate:
mov dx,0x70
call startstopclk
dec edx
mov al,7 ;set days
out dx,al
inc edx
mov al,bl
out dx,al
dec edx
mov al,8 ;set months
out dx,al
inc edx
mov al,bh
out dx,al
dec edx
mov al,9 ;set years
out dx,al
inc edx
shr ebx,8
mov al,bh
out dx,al
jmp endsettime
nosetdate: ;set time or alarm-clock
cmp ecx,3
ja wrongtime
cmp bl,0x23
ja wrongtime
cmp bh,0x59
ja wrongtime
shl ebx,4
cmp bl,0x90
ja wrongtime
cmp bh,0x92
ja wrongtime
shl ebx,4
bswap ebx ;00HHMMSS
cmp bl,0x59
ja wrongtime
shl ebx,4
cmp bl,0x90
ja wrongtime
shr ebx,4
mov dx,0x70
call startstopclk
dec edx
cmp ecx,3
je setalarm
xor eax,eax ;al=0-set seconds
out dx,al
inc edx
mov al,bl
out dx,al
dec edx
mov al,2 ;set minutes
out dx,al
inc edx
mov al,bh
out dx,al
dec edx
mov al,4 ;set hours
out dx,al
inc edx
shr ebx,8
mov al,bh
out dx,al
jmp endsettime
setalarm:
mov al,1 ;set seconds for al.
out dx,al
inc edx
mov al,bl
out dx,al
dec edx
mov al,3 ;set minutes for al.
out dx,al
inc edx
mov al,bh
out dx,al
dec edx
mov al,5 ;set hours for al.
out dx,al
inc edx
shr ebx,8
mov al,bh
out dx,al
dec edx
mov al,0x0b ;enable irq's
out dx,al
inc dx
in al,dx
bts ax,5 ;set bit 5
out dx,al
endsettime:
dec edx
call startstopclk
sti
mov [esp+36],dword 0
ret
bat_low:
sti
mov [esp+36],dword 2
ret
wrongtime:
sti
mov [esp+36],dword 1
ret
startstopclk:
mov al,0x0b
out dx,al
inc dx
in al,dx
btc ax,7
out dx,al
ret