Int 61/AH=1Fh

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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

See Also: INT 61"FTP Software" - INT 61/AH=00h"PC/TCP"

(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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