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Int 7F Fn 15 - Alloy Ntnx, Mw386 - Get Channel Status [N]
AH = 15h
CL = 00h
AL = channel number
DX:DI -> status structure (see below)
Return: AL = status (00h-03h) (see AH=12h)
See Also: AH=15h/CL=01h
Format of status structure:
Offset Size Description
00h BYTE channel status
bit 0: channel open
bit 1: channel buffer contains received data
bit 7: channel locked
01h BYTE sender ID
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