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Function  28h  Random Block Write to File Specified in Struct -FCB

Similar to 27h (Random Write) except allows multiple files to be read.

entry AH 28h

CX number of records to write

DS:DX address of an opened Struct -FCB

return AL 00h successful write

01h disk full, no data written

02h DTA too small for record size specified (write canceled)

CX number of records written

note 1) The record size is specified in the Struct -FCB.

2) This service allocates disk clusters as required.

3) This function assumes that the Struct -FCB Record Size field (offset

0Eh) is correctly set. If not set by the user, the default is 128


4) The record size is specified in the Struct -FCB. The service updates

the Current Block (offset 0Ch) and Current Record (offset 20h) fields

to the next record not read.

5) The record is written to disk at the current DTA address as specified

by the most recent call to function 1Ah. If the size of the record and

location of the DTA are such that a segment overflow or wraparound

would occur, the error return is set to AL=02h

6) If called with CX=0, no records are written, but the FCB's File Size

entry (offset 1Ch) is set to the size specified by the FCB's Relative

Record field (offset 21h).

file: /Techref/INT/21f/28.htm, 1KB, , updated: 1999/4/26 11:31, local time: 2024/2/27 15:30,

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