中国科学院21H条(0x21)
1CH功能(0x1c或28)-->得到的数据驱动
Call with: AH = 1CH
DL = Drive Code
Returns: If function is successful
AL = sectors per cluster
DS: BX = segment: offset of media ID byte
CX = size of physical sector in bytes
DX = number of clusters for default or
specified drive
如果函数不成功,无效或驾驶错误批判
AL = FFH
评论:
这项功能得到指定磁盘驱动器配置的资料向媒体和识别指针字节从其档案配置表.媒体指广义表身分字节,由于在中国科学院21H条,功能1bh,媒体身分资料.
中国科学院21H条(0x21)
功能1dh(0x1d或29)-->预留
中国科学院21H条(0x21)
功能1eh(0x1e或30)-->预留
中国科学院21H条(0x21)
功能1fh(0x1f或31)-->预留
中国科学院21H条(0x21)
功能20H条(0x20或32)-->预留
中国科学院21H条(0x21)
功能21H条(0x21或33)-->随机阅读
Call with: AH = 21H
DS: DX = segment: offset of previously opened
file control block
Returns: AL = 00H if read successful
01H if end of file
02H if segment wrap, read canceled
03H if partial record read at end of
file
评论:
选定了这个功能写一个档案记录成的回忆.阅读记录是在目前磁盘存储转移到区地址 指定最近号召中国科学院21H条1ah功能.
中国科学院21H条(0x21)
功能22h组(34或0x22)-->随机写
Call with: AH = 22H
DS: DX = segment: offset of previously opened
file control block
Returns: AL = 00H if write successful
01H if disk full
02H if segment wrap, write canceled
评论:
这个数据存储功能写道成选定记录档案.
中国科学院21H条(0x21)
功能-2402(0x23或35)-->得到档案大小
Call with: AH = 23H
DS: DX = segment: offset of unopened file
control block
Returns: If function is successful and matching filename found
AL = 00H
循环流化床和相对场纪录(抵消21H条)定数量的记录档案,如果要在下纠合完整纪录
If function is unsuccessful and no matching file found
AL = FFH
评论:
为配合这次档案检索功能,在当前目录; 如果发现 循环流化床与更新档案大小数目计算记录.没有任何违约记录本功能,因此适度规模值必须放置在现场循环流化床尺寸纪录(抵消0eh)日前呼吁这个功能.
中国科学院21H条(0x21)
功能24h内(36或0x24)-->一套相对人数
Call with: AH = 24H
DS: DX = segment: offset of previously opened
file control block
Returns: AL is destroyed (other register not affected)
FCB relative-record field (offset 21H) updated
评论:
这项功能相对集-控制档案记录了多少场座(循环流化床),相当于目前的档案作为记录在循环流化床开幕.
中国科学院21H条(0x21)
测功能(或0x2537)-->确定中断向量
Call with: AH = 25H
AL = interrupt number
DS: DX = segment: offset of interrupt handling
routine
Returns: Nothing
Comments:
This function Initialize a CPU interrupt vector to point to an interrupt handling routine. It should be used in preference to direct editing of the interrupt-vector table by well-behaved applications.
中国科学院21H条(0x21)
Function 26H (0x26 or 38) --> Create new Program
Segment Prefix (PSP)
Call with: AH = 26H
DX = segment: of new program segment
prefix (PSP)
Returns: Nothing
评论:
这部分的功能复制品节目的前缀(白鼠)正在执行一项计画,以解决部分自由指定存储、然后更新新白鼠使它可用另一纲领.
中国科学院21H条(0x21)
功能27H款(0x27或39)-->随机块读
Call with: AH = 27H
CX = number of records to read
DS: DX = segment: offset of previously opened
file control block
Returns: AL = 00H if all requested records read
01H if end of file
02H if segment wrap
03H if partial record read at end of
file
CX = actual number of records read
评论:
这个功能写一个或多个记录,从时序进入记忆的档案,档案起于指定地点.如果缓冲的大小和位置,都是这种周期性的部分溢流或将发生 功能未能与实务2小时35分钟,如果返回局部记录阅读截至档案 其余的记录与零点软垫.
中国科学院21H条(0x21)
功能38.3%(0x28或40)-->随机块写
Call with: AH = 28H
CX = number of records to write
DS: DX = segment: offset of previously opened
file control block
Returns: AL = 00H if all requested records written
01H if disk full
02H if segment wrap
CX = actual number of records written
评论:
这个功能写一个或多个记录存储到一个文件顺序,从立案到指定地点.如果缓冲的大小和位置,都是这种周期性的部分溢流或将发生 以功能未能归还典2小时35分钟.
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