Advanced
BIOS
Functions
6-10
Table 6-2 Extended Function Calls
F#
RESULT
0 Get Time
and
Date
1
Set Time
and
Date
2
Play Music
3 Sound Beep
4
Report
Cursor
Position (With ESC)
5
Automatic Power Off (APO)
6
Initialize Keyboard
FIFO
Buffer
7
Direct
CRT
I/O
(DMA
Transfer)
8 Write CMOS
9
Read CMOS
10
Initialize RS 232C
Each
of
the extended CBIOS functions
is
described in detail in the following section
of
this chapter.
Get Time
And
Date
ENTRY
CL:
OOH
DS:DX:
Data
Buffer Address
EXT
FUNCO
GET
TIME
AND
DATE
RETURN
Buffer: Time
and
Date
The
Get
Time
and
Date
function returns the system time
and
date. Registers DS
and
DX
hold
the address
of
the
I/O
data
buffer in which the
data
is
to be stored. The
system fills the
data
buffer
at
the indicated address in the following format.
Year
Month
IDay
of
Week*
Day
Hour
Minute
Second
<----------1 byte--------->
* -
Month
and
Day
of
Week are each half byte values.
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