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Int 7F Fn 12 - Alloy Ntnx, Mw386 - Acknowledge Datagram [N]
AH = 12h
AL = channel number being acknowledged
DI:DX = 32-bit status to return to sender
Return: AL = status (see below)
Note: also unlocks the channel, allowing the next datagram to be received
See Also: AH=11h,AH=15h/CL=04h
Values for status:
00h successful
01h busy
02h channel range error (not 00h-3Fh)
03h invalid subfunction
0Ah channel not open
0Bh no message in channel
0Ch destination slave busy--retry (NTNX)
0Dh destination user not active
0Eh destination slave not active (NTNX)
0Fh destination disabled datagram service
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