Int 61/AH=1Fh

PC/TCP kernel v2.05+ - net_asynch - SET UP ASYNCHRONOUS CALL-BACK

AH = 1Fh
BX = network descriptor
CX = event type (see #03466)
DS:SI -> event handler routine (see #03467)
ES:DI = 32-bit hint passed to handler

Return:
CF clear if successful
DS:DX -> previous handler
CF set on error
AX = error code (see #03319 at INT 61"FTP Software")

Note: ICMP messages do not trigger events on stream connections



(Table 03466)
Values for PC/TCP event type:
00h    alarm
01h    open (successfully opened stream connection)
02h    receive (data available)
03h    transmit (ACK received on stream connection)
04h    transmit flush???
05h    foreign close (remote host closed data connection)
06h    close (local host closed connection and protocol is complete)
07h    error (error code passed to handler as arg)


(Table 03467)
Values PC/TCP user event handler is called with:.
BX = network descriptor.
CX = event type (see #03466).
DS:DX -> arg.
ES:DI = 32-bit hint value.
STACK:
Small stack, possibly the DOS stack

Category: Network - Int 61h - P

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