Int 31H Function 0304H

Free Real Mode Callback Address [0.9]

Releases a real mode callback address that was previously allocated with the Allocate Real Mode Callback Address function (Int 31H Function 0303H).

Call With

AX = 0304H
CX:DX = real mode callback address to be freed


if function successful
Carry flag = clear

if function unsuccessful
Carry flag = set
AX = error code
8024Hinvalid callback address


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