Features: Search
entry parameters: AH = 0CH
CH = low 8 bits of cylinder
CL ( 7-6 bit) = cylinders of high-2
DH = head
DL = 80H ~ 0FFH: Hard
export parameters: CF = 0 - successful operation , AH = 00H, otherwise, AH = status code, see the instructions in the function of No. 01H
(14), function 0DH
Features: Hard system reset
entrance Parameter: AH = 0DH
DL = 80H ~ 0FFH: Hard
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code, see function No. 01H described in
(15), function 0EH
Function Description: Read sector buffer
entry parameters: AH = 0EH
ES: BX = buffer address
export parameters: CF = 0 - successful operation, otherwise, AH = status code,uggs for cheap, see the instructions in the function of No. 01H
(16), function 0FH
Function Description: Write sector buffer
entry parameters: AH = 0FH
ES: BX = buffer address
export parameters: CF = 0 - operation is successful, otherwise, AH = status code, see the instructions in the function of No. 01H
(17), function 10H
Function Description: Read drive status
entry parameters: AH = 10H
DL = 80H ~ 0FFH: Hard
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code, see the feature number 01H described in
(18), function 11H
Features: Calibration parameters of the drive
entry: AH = 11H
DL = 80H ~ 0FFH : Hard
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code, see the instructions in the function of No. 01H
(19), function 12H < br>
Features: Controller RAM diagnostic
entry parameters: AH = 12H
export parameters: CF = 0 - successful operation, otherwise, AH = status code, see function No. 01H described in
(20), function 13H
Features: controller drive diagnostic
entry parameters: AH = 13H
export parameters : CF = 0 - successful operation, otherwise, AH = status code, see the instructions in the function of No. 01H
(21), function 14H
Features: Controller internal diagnostic
entry parameters: AH = 14H
export parameters: CF = 0 - successful operation, otherwise, AH = status code, see the instructions in the function of No. 01H
(22) , function 15H
Function Description: Read the disk type
entry parameters: AH = 15H
DL = drive, 00H ~ 7FH: floppy; 80H ~ 0FFH: Hard < br>
export parameters: CF = 1 - operation failed, AH = status code, see the features described in No. 01H, otherwise, AH = 00H - no installation drive
= 01H - no change in line support the floppy drive
= 02H - change the line with support for floppy disk drive
= 03H - hard, CX: DX = 512-byte sector number
( 23), function 16H
Function Description: Read the disk change state
entry parameters: AH = 16H
DL = 00H ~ 7FH: Floppy
Export parameters: CF = 0 - the disk does not change, AH = 00H,cheap uggs, otherwise, AH = 06H, see the features described in No. 01H
(24), function 17H
Function Description: set the disk type
entry parameters: AH = 17H
DL = 00H ~ 7FH: Floppy AL = 00H - unused
= 01H - 360K in 360K drive
= 02H - 360K in 1.2M drive
= 03H - 1.2M in 1.2M drive
= 04H - 720K in 720K drive
exports Parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code, see the instructions in the function No. 01H
(25), function 18H
Function Description: Set
entry format media type parameters: AH = 18H
CH = cylinder number
CL = number of sectors per track
DL = 00H ~ 7FH: floppy
export parameters: CF = 0 - Operation successful, AH = 00H, ES: DI = media type parameter list address, otherwise, AH = status code, see the features described in No. 01H < br>
(26), function 19H
Function Description: head protection, only in the PS / 2 effectively in this omitted
(27), function 1AH
Function Description: Format ESDI drive, only PS / 2 effectively in this omitted
3, serial port service (Serial Port Service - INT 14H)
00H - initialize the communication port 03H - read the communication port state
01H - output character to the communication port 04H - initialize the communication port expansion
02H - read characters from the communication port < br>
(1), Function 00H
Features: initialize communications port parameters
entry: AH = 00H
DX = initialize communication slogan (0 = COM1, 1 = COM2, ... ...)
AL = initializing parameters, parameters as follows: baud rate parity bits stop bit word
76543210
000 = 110X0 = None0 = 1 bit10 = 7 bits
001 = 15001 = Odd1 = 2 bits11 = 8 bits
010 = 30011 = Even
011 = 600
100 = 1200
101 = 2400
110 = 4800
111 = 9600
for PS / 2, available INT 14H functions 04H and 05H to initialize its communication speed is greater than 9600.
export parameters: AH = communication port status, the status bit is 1, the following meanings: bit 7 - bit out
6 - Transfer shift register empty
bit 5 - transfer to maintain registers empty
bit 4 - found terminate bit 3 - find frame error
bit 2 - Parity error found
bit 1 - found in cross-border fault
bit 0 - Data is ready to accept
AL = Modem status
bit 7 - to accept one-way signal diagnosis
bit 6 - Ring Indicator
bit 5 - Data Send Ready
bit 4 - clear the data, then send bit 3 - to change the signal in the receiving line diagnostic
bit 2 - after the boundary ring indicator
bit 1 - change the \Features: Output character to the communication port parameters
entry: AH = 01H
AL = character
DX = initialize communication slogan (0 = COM1, 1 = COM2 , ... ...)
export parameters: AL the value of the constant
AH bit 7 = 0 - successful operation, communication port state, AH bit 6 ~ 0 is the status bits < br>
(3), function 02H
Features: read character from the communication port parameters
entry: AH = 02H
DX = initialize communication slogan (0 = COM1, 1 = COM2, ... ...)
export parameters: AL = received character
AH bit 7 = 0 - successful operation,ugg boots store, communication port state, AH's Bit 6 ~ 0 is the status bits
(4), function 03H
Function Description: Read communication port state
entry parameters: AH = 03H
< br> DX = initialize communication slogan (0 = COM1, 1 = COM2, ... ...)
export parameters: AH = communication port status, AL = Modem status, see the features described in No. 00H
(5), function 04H
Features: Expansion initialize communications port, only in the PS / 2 effectively in this omitted
4, Miscellaneous System Services ( Miscellaneous System Service - INT 15H)
00H - open cassette tape drive motor 85H - System request (SysReq) key
01H - off cassette tape drive motor 86H - delay
02H - Reading cassette tape machine 87H - Move extended memory block
03H - Write a cassette tape machine 88H - read the extended memory size
0FH - Format ESDI drive periodic interrupt 89H - into protected mode
21H - read / write self test (POST) Error Record 90H - Equipment wait
4FH - keyboard intercept 91H - Device Power On Self Test
80H - Equipment Open C0H - read system environment
81H - Equipment Close C1H - Read Extended BIOS Data Area address
82H - the process terminates C2H - mouse graphics
83H - Event Wait C3H - set WatcHdog out
84H - Reading Joystick C4H - Programmable option select
(1), Function 00H
Features: open cassette tape drive motor
entry parameters: AH = 00H
export parameters: CF = 0 - successful operation, otherwise, AH = status (86H, If you do not install the cassette tape drive)
(2), function 01H
Features: off cassette tape motor
entry parameters: AH = 01H
export parameters: CF = 0 - Operation successful, otherwise, AH = status (86H, If you do not install the cassette tape drive)
(3), function 02H
Features: Reading cassette tape drive
entry parameters: AH = 02H
CX = number of bytes read
ES: BX = store data buffer address
export parameters: CF = 0 - Operation successful, DX = actual number of bytes read, ES: BX point to the back of the last byte address, otherwise, AH = status code, meaning its value is as follows: 01H
- CRC checksum error 80H - Illegal command
02H - digital signal confusion 86H - not installed cassette tape drive
04H - no discovery data
( 4), function 03H
Features: write cassette tape
entry parameters: AH = 03H
CX = number of bytes to write
< br> ES: BX = Saved data buffer address
export parameters: CF = 0 - Operation successful, CX = 00H, ES: BX point to the back of the last byte address, otherwise, AH = status code, meaning its value is as follows: 80H -
illegal command 86H - not installed cassette tape drive
(5), functional 0FH
Function Description: Format periodic interruptions of ESDI drive, only PS / 2 effectively in this omitted
(6), function 21H
Features: Read / write self test (POST) error record only in the PS / 2 effectively in this omitted
(7), functional 4FH
Features: Keyboard intercept, only PS / 2 effectively in this omitted < br>
(8), function 80H
Features: Open the device
entry parameters: AH = 80H
BX = device number
CX = process ID
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code
(9), function 81H
function Description: Turn off equipment
entry parameters: AH = 81H
BX = device No.
CX = process ID
export parameters: CF = 0 - operation is successful, AH = 00H, otherwise, AH = status code
(10), function 82H
Function Description: Process termination
entry parameters: AH = 81H
BX = process ID
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code
(11), function 83H
Function Description: Event wait
entry parameters: AH = 83H If you need to wait for the event, then: AL = 00H
CX: DX = 1000 Minutes
ES : BX = address of byte semaphore
Otherwise, the call parameters for the AL = 01H
export parameters: If called, AL = 00H, operation is successful - CF = 0, otherwise CF = 1
(12), function 84H
Function Description: Read Joystick
entry parameters: AH = 84H
DX = 00H - Read switch settings
= 01H - read the resistance of input
export parameters: CF = 1H - operation failed, otherwise,
DX = 00H when, AL = switch settings (bit 7 ~ 4)
DX = 01H when, AX, BX, CX and DX, respectively A (x), A (y), B (x) and B (y) the value of < br>
(13), function 85H
Function Description: The system request (SysReq) key
entry parameters: AH = 85H
AL = 00H - key Press
= 01H - key release
export parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code
(14 ), function 86H
Features: Delayed
entry parameters: AH = 86H
CX: DX = 1000 Minutes
export parameters: CF = 0 - Operation successful, AH = 00H
(15), function 87H
Function Description: From the conventional memory and extended memory extended memory block to move between entry parameters
: AH = 87H
CX = number of words moved
ES: SI = GDT (Global Descriptor Table) address, its structure is defined as follows: offset information stored
00h-0Fh reserved, but now all is 0
10h-11h segment length (2CX-1 or greater)
12h-14h24-bit source address
15h access byte (a value of 93h)
16h-17h reserved, but now all is 0
18h-19h segment length (2CX-1 or greater)
< br> 1Ah-1Ch 24 bit object and the source address
1Dh access bytes (a value of 93h)
1Eh-2Fh reservations, but now all is 0
exports Parameters: CF = 0 - Operation successful, AH = 00H, otherwise, AH = status code, its meaning is as follows:
01H - RAM parity error
02H - aborts wrong < br>
03H - 20 gate address line failure
(16),ugg boots store, function 88H
Function Description: Read extended memory size
entry parameters: AH = 88H
export parameters: AX = number of bytes of extended memory (in K units)
(17), function 89H
Features: access to protected mode, CPU from real mode into protected mode
entry parameters: AH = 89H
BH = IRQ0 interrupt No.
BL = IRQ8 interrupt No.
ES: SI = GDT's address (see the function of No. 87H)
export parameters: CF = 1 - operation failed, AH = 0FFH, otherwise, AH = 00H, CS, DS, ES and SS are user-defined options device
(18), function 90H
Function Description: Equipment wait
entry parameters: AH = 90H AL = drive type, drive type concrete is defined as follows:
= 00H ~ 7FH - and then reuse the equipment serial
= 80H ~ 0BFH - reentrant devices
= 0C0H ~ 0FFH - waiting for access to equipment, not self- check function
00h - disk
02h - Keyboard
80h - network
FDh - floppy disk motor start 01h - Floppy
03h - Point Equipment (Pointing Device)
FCh - Hard Reset
FEh - printer
ES: BX = on the drive type 80H ~ 0FFH request block address
< br> Output Parameters: CF = 1 - operation failed, otherwise, AH = 00H
(19), function 91H
Features: Power On Self Test Equipment
entry parameters: AH = 91H
AL = 00H ~ 7FH - Serial longer reuse equipment
= 80H ~ 0BFH - reentrant devices
export parameters: AH = 00H
(20), function 0C0H
Function Description: Read the system environment
entry parameters: AH = 0C0H
export parameters: ES : BX = configuration table address, configure the table are defined as follows: explain the meaning of the offset
00h-01h table size (bytes)
02h model
03h system sub-model
04hBIOS version
05h configuration flag, which is 1 when you stated the following:
bit 7-DMA channel 3 used
bit 6 - there is a subordinate 8259
bit 5 - real-time clock and effective
bit 4 - Keyboard interception effective
bit 3 - wait for external events, effective
bit 2 - extended BIOS data area
bit 1 - micro-channel facilities
bit 0 - reserved
06h-09h reserved
(21), function C1H
Function Description: Read Extended BIOS Data Area address, only PS / 2 effectively in this omitted
(22), function C2H
function Description: Mouse graphics, only the PS / 2 effectively in this omitted
(23), function C3H
Function Description: Set WatcHdog out, only in PS / 2 in the effective In this omitted
(24), functional C4H
Features: programmable option selection, only the PS / 2 effectively in this omitted
5, the keyboard service (Keyboard Service - INT 16H)
00H, 10H - from the keyboard characters 03H - set the repeat rate
01H, 11H - read keyboard status 04H - set the keyboard Click
02H,ugg adirondack tall, 12H - read keyboard symbol 05H - character and scan code into the stack
(1),chi flat irons, Function 00H and 10H
Features: from the keyboard entrance into the character
parameters: AH = 00H - Reading keyboard
= 10H - Reading extended keyboard, can determine the contents of cell 0000:0496 H: extended keyboard is valid
< br> Export parameters: AH = keyboard scan code
AL = ASCII character code
(2), function 01H and 11H
Function Description: Read keyboard status
entry parameters: AH = 01H - Check ordinary keyboard
= 11H - check extended keyboard
export parameters: ZF = 1 - no character input, otherwise, AH = keyboard scan code, AL = ASCII code.
(3),ugg australia sale, function 02H and 12H
Function Description: Read keyboard symbol
entry parameters: AH = 02H - Common keyboard shift flags
= 12H - extended keyboard shift flags
export parameters: AL = keyboard symbol (02H and 12H are valid), the Members of the meaning of a value of 1 is as follows: bit 7-INS opened Status bit 3-ALT key is pressed
bit 6-CAPS LOCK-opened state-bit 2-CTRL key pressed
open spaces 5-NUM LOCK state bit 1 - Left SHIFT key is pressed < br>
-bit 4-SCROLL LOCK open status bits 0 - Right SHIFT key is pressed
AH = extended keyboard symbol (12H effective), the Members of the meaning of a value of 1 is as follows:
bit 7-SysReq key pressed bit 3 - the right ALT key is pressed
bit 6-CAPS LOCK key is pressed, bit 2 - the right CTRL key is pressed
bit 5-NUM LOCK key pressed bit 1 - the left ALT key is pressed
bit 4-SCROLL key is pressed, bit 0 - the left CTRL key is pressed
(4), function 03H
Function Description : Set the repeat rate
entry parameters: AH = 03H for PC / AT and PS / 2: AL = 05H
BH = repeat delay
BL = repeat rate
for the PCjr: AL = 00H - into the default rate and delay
= 01H - increase the initial delay
= 02H - repetition rate cut in half
= 03H - increased delays and lower half of the repetition frequency
= 04H - turn off keyboard repeat function
export parameters: None
(5), functional 04H
Function Description: Set the keyboard click
entry parameters: AH = 04H AL = 00H - turn off keyboard click function
= 01H - Click to open the keyboard function
Output Parameters: None
(6), function 05H
Features: scan code characters and their entry into the stack
parameters: AH = 05H
CH = character description code
CL = ASCII character code
export parameters: CF = 1 - operation is successful, AL = 00H, otherwise, AL = 01H
6, parallel port services (Parallel Port Service - INT 17H)
00H - to printer output character
01H - initialize the printer port
02H - read the printer status
(1), Function 00H
Function Description: to the printer output character
entry parameters: AH = 00H
AL = Output character
DX = printer number (0-LPT1 ,1-LPT2 ,2-LPT3, ... ...)
export parameters: AH = printer status. Its Members to 1, the following meanings: bit 7 - printer spare bit 3-I / O error
bit 6 - the printer to respond to bit 2 - reserved
bit 5 - no paper bit 1 - reservations
bit 4 - printer selected bit 0 - printer timeout
(2), function 01H
Function Description: Initialize the printer port
import parameters: AH = 01H
DX = printer number (0-LPT1 ,1-LPT2 ,2-LPT3, ... ...)
export parameters: AH = printer status. You define the following functions 00H shown
(3), function 02H
Features: reading printer status
entry parameters: AH = 02H
DX = printer number (0-LPT1 ,1-LPT2 ,2-LPT3, ... ...)
export parameters: AH = printer status. You define the following functions 00H shown
7, the clock service (Clock Service - INT 1AH)
00H - read the clock \01H - set the clock \04H - read date 80H - set the sound source information
05H - set the date
(1), Function 00H
Function Description: Read clock \br>
entry parameters: AH = 00H
export parameters: AL = 00H - not over night, otherwise, that has passed midnight
CX: DX = clock \
(2), function 01H
Function Description: Set the clock \\
export parameters: CH = BCD code format of the hour
CL = BCD code format of the minutes
DH = BCD code format of the second
DL = 00H - standard time, or, daylight saving time
CF = 0 - clock in the walk, otherwise, the clock stopped
(4), function 03H
Function Description: set the time
entry parameters: AH = 03H
CH = BCD code format of the hour
CL = BCD code format of the minutes
DH = BCD code format of the second
DL = 00H - standard time, or, daylight saving time
export parameters: None
(5), function 04H
function Description: Read Date
entry parameters: AH = 04H
export parameters: CH = BCD code format of the century
CL = BCD code format in
< br> DH = BCD code format of the month
DL = BCD code format on
CF = 0 - clock in the walk, otherwise, the clock stopped
(6) , function 05H
Function Description: Set the date
entry parameters: AH = 05H
CH = BCD code format of the century
CL = BCD code format annual
DH = BCD code format on
DL = BCD code format on
export parameters: None
(7), function 06H
Function Description: Set the alarm clock
entry parameters: AH = 06H
CH = BCD code format of the hour
CL = BCD code format of the minutes of < br>
DH = BCD code format of the second
export parameters: CF = 0 - successful operation, otherwise, alarm clock has been set or clock stopped
(8), Function 07H
Features: Alarm reset
entry parameters: AH = 07H
export parameters: None
(9), function 0AH
Function Description: Read the number of days counted, only PS / 2 and effective, in this omitted
(10), function 0BH
Function Description: Set the number of days counted only in the PS / 2 effective, in this omitted
(11), function 80H
Function Description: Set the sound source information
entry parameters: AH = 80H
AL = sound source
= 00H - 8253 programmable timer, channel 2
= 01H - cassette tape input
= 02H - I / O channels The \> INT 00H - \>
INT 04H - Arithmetic overflow error
INT 05H - Print Screen and BOUND cross-border
INT 06H - Illegal Instruction error
INT 07H - Processor Extension invalid < br>
INT 08H - clock interrupt
INT 09H - keyboard input
INT 0BH - communication port (COM2:)
INT 0CH - communication port (COM1: )
INT 0EH - the disk drive input / output
INT 11H - read the device configuration
INT 12H - read conventional memory size (return value of AX to memory capacity, to K as the unit)
INT 18H-ROM BASIC
INT 19H - reboot the system
INT 1BH-CTRL + BREAK handler
INT 1CH - Users clock service
INT 1DH - point to display parameter table pointer
INT 1EH - point to the disk drive parameter table pointer
INT 1FH - graphics character mode table pointer to point < PIXTEL_MMI_EBOOK_2005> 6
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