中国科学院21H条(0x21)
功能丘(0x44或68)分功能0ch(0x0c或12)我/澳七月我通用/输出控制字器件
Call with: AH = 44H
AL = 0CH
BX = handle
CH =category (major) code:
00H = unknown
01H = COM1, COM2, COM3,OR COM4
03H = CON (keyboard and display)
05H = LPT1, LPT2, OR LPT3 |
CL = function (minor) code:
45H = Set Iteration Count
4AH = Select Code Page
4CH = Start Code Page Preparation
4DH = End Code Page Preparation
5FH = Set Display Information
65H = Get Iteration Count
6AH = Query Selected Code Page
6BH = Query Prepare List
7FH = Get Display Information |
DS: DX = segment: offset of parameter block
Returns: If function successful
Carry flag = clear
And if called with CL = 65H, 6AH, 6BH or 7FH
DS: DX = segment: offset of parameter block
If function unsuccessful
Carry flag = set
AX = error code
评论:
它提供通用的应用程序沟通机制与人格装置司机.
中国科学院21H条(0x21)
功能丘(0x44或68)分功能0dh(0x0d或13)我/澳七月-->通用本人/输出控制装置座
Call with: AH = 44H
AL = 0DH
BL = drive code (0 =default, 1=A,
2=B, etc.)
CH = category (major) code:
08H = disk drive
CL = function (minor) code:
40H = Set Drive Parameters
41H = Write Track
42H = Format and Verify Track
47H = Set Access Flag
60H = Get Device Parameters
61H = Read Track
62H = Verify track
67H = Get Access Flag |
DS: DX = segment: offset of parameter block
Returns: If function successful
Carry flag = clear
And if called with CL = 60H or 61H
DS: DX = segment: offset of parameter block
If function unsuccessful
Carry flag = set
AX = error code
评论:
这提供了一个功能小组通用应用程序沟通机制和块设备驱动.允许检查或改变计画的逻辑驱动器的参数和阅读、书写、格式 在硬件方面,核实磁盘独立地进行.
中国科学院21H条(0x21)
功能丘(0x44或68)分功能0eh(0x0e或14)我/澳七月-->>得逻辑图驱动
Call with: AH = 44H
AL = 0EH
BL = drive code (0 = default, 1=A,
2=B, etc.)
Returns: If function successful
Carry flag = clear
AL = mapping code
00H, if only one logical drive code
assigned to the block device
01H-1AH logical drive code (1=A,
2=B, etc.) mapped to the block device
If function unsuccessful
Carry flag = set
AX = error code
评论:
它返回的逻辑驱动代码是用来获取最近指定块径.
中国科学院21H条(0x21)
功能丘(0x44或68)分功能0fh(0x0f或15)我/澳七月-->一套逻辑图驱动
Call with: AH = 44H
AL = 0FH
BL = drive code (0 = default, 1=A,
2=B, etc.)
Returns: If function successful
Carry flag = clear
AL = mapping code
00H, if only one logical drive code
assigned to the block device
01H-1AH, logical drive code (1=A,
2=B, etc.) mapped to the
block device
If function unsuccessful
Carry flag = set
AX = error code
评论:
这一分套功能逻辑驱动下,将用来参考代码一座装置.
中国科学院21H条(0x21)
功能22945小时(或690x45)-->重复处理
Call with: AH = 45H
BX = handle to be duplicated
Returns: If function successful
Carry flag = clear
AX = new handle
If function unsuccessful
Carry flag = set
AX = error code
评论:
这项功能返回一个新的处理,是指在同一装置或档案同一个位置给予处理装置或目前公开档案.
中国科学院21H条(0x21)
功能46h(或700x46)-->接续处理
Call with: AH = 46H
BX = handle for file or device
CX = handle to be redirected
Returns: If function successful
Carry flag = clear
If function unsuccessful
Carry flag = set
AX = error code
评论:
如果有两个考虑柄, 二是处理好这个功能使得同一装置或档案指在同一地点为第一处理. 第二则是说要重新办理.
中国科学院21H条(0x21)
功能45~47h(71或0x47)-->获得本届名录
Call with: AH = 47H
DL = drive code (0 =default, 1=A,
2=B, etc.)
DS: SI = segment: offset of 64-byte buffer
Returns: If function is successful
Carry flag = clear
And buffer is filled in with full pathname from root of current directory.
If function is unsuccessful
Carry flag = set
AX = error code
评论:
这项功能取得asciiz串,描述了从根到当前路径目录, 而这名名录.
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