User`s guide

BDOS FUNCTION 41: TEST AND WRITE RECORD
Entry Parameters:
Registers C: 29H
DE: FCB Address
Returned Value:
Registers A: Error Code
H: Physical Error
The Test and Write Record function is an MP/M 11" function that is not sup-
ported under CP/M 3. If called, Function 41 returns with register A set to OFFH and
register H set to zero.
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BDOS Function Calls CP/M 3 Programmers Guide