讀取年月日及當前時間
**
escape equ 1bhcmos內容對照cmos_port equ 70h
cmos_rega equ 0ah
update_flag equ 80h
cmos_sec equ 00h
cmos_min equ 02h
cmos_hour equ 04h
cmos_day equ 07h
cmos_month equ 08h
cmos_year equ 09h
data segment
datetime db
'yy-mm-dd hh:mi:ss
'dt_len = $ - offset datetime
data ends
stack segment
db 16
dup(?)
stack ends
code segment
assume
cs:code,
ds:data,
ss:stack
start:
movax,data
movds,ax
movax,stack
movss,ax
addsp,-
16@@:
movsi,offset datetime
moval,cmos_rega
outcmos_port,al
jmp$+2in
al,cmos_port+
1test
al,update_flag
jnz@b
;get year
moval,cmos_year
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
get month
moval,cmos_month
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
get day
moval,cmos_day
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
get hour
moval,cmos_hour
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
get minute
moval,cmos_min
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
get second
moval,cmos_sec
outcmos_port,al
jmp$+2in
al,cmos_port+
1mov
ah,al
movcl,
4shr
ah,cl
andal,
00001111b
addah,30h
addal,30h
mov[si],ah
mov[si+
1],al
addsi,3;
movsi,offset datetime
call
display
;mov
ah,1
int16h
cmpal,escape
jz_exit
call
cleankbbuf
jmp@b
_exit:
movah,4ch
int21h
cleankbbuf proc
_again:
movah,
1int
16hjz
_over
movah,
0int
16hjmp
_again
_over:
retcleankbbuf endp
display proc
movax,0b800h
moves,ax
movah,0f4h
;087h ;此處設定顯示的屬性即顏色irgb
movdi,(80*
12+28)*2;
(80列*25行)12表示顯示的行(中間)/28表示顯示起始列
movcx,dt_len
s:mov
al,[si]
moves:
[di],ax
;ax中ah儲存顏色，al儲存輸出值/此處可以用ax或al
incsi
adddi,
2loop s
retdisplay endp
code ends
end start
位址 內容 位址 內容 位址 內容 位址 內容
00h time - seconds 20h reserved 40h extended cmos 60h user password
01h alarm - seconds 21h reserved 41h extended cmos 61h user password
02h time - minutes 22h reserved 42h extended cmos 62h extended cmos
03h alarm - minutes 23h reserved 43h extended cmos 63h extended cmos
04h time - hours 24h reserved 44h extended cmos 64h extended cmos
05h alarm - hours 25h reserved 45h extended cmos 65h extended cmos
06h date - day of the week 26h reserved 46h extended cmos 66h extended cmos
07h date - day 27h reserved 47h extended cmos 67h extended cmos
08h date - month 28h reserved 48h extended cmos 68h extended cmos
09h date - year 29h reserved 49h extended cmos 69h extended cmos
0ah status register a 2ah reserved 4ah extended cmos 6ah extended cmos
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