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Function  14h   Sequential Disk File Read                                 (FCB) 

Reads record sequentially from disk via Struct -FCB

entry AH 14h

DS:DX pointer to an opened Struct -FCB

return AL 00h successful read

01h end of file (no data read)

02h Data Transfer Area too small for record size specified

or segment overflow

03h partial record read, EOF found

note 1) The record size is set to the value at offset 0Eh in the Struct -FCB.

2) The record pointed to by the Current Block (offset 0Ch) and the Current

Record (offset 20h) fields is loaded at the DTA, then the Current Block

and Current Record fields are incremented.

3) The record is read into memory 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

4) If a partial record is read at the end of the file, it is passed to the

requested size with zeroes and the error return is set to AL=03h.




file: /Techref/INT/21f/14.htm, 1KB, , updated: 1999/4/26 12:31, local time: 2024/6/21 08:06,
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