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<TITLE>Int 7C/AX=0004h
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Int 7C/AX=0004h - SK-UPPS Data Link Interface API - REQUEST BUFFER -
AX = 0004h
DX = protocol ID (see AX=0007h,#03849)
Return: AX = completion code (see also #03846)
0000h successful
ES:BX - Memory Buffer (Mbuf) (see #03847)
Note: if the DLI has no free Mbufs, it will set an internal flag for the
protocol and later call the protocol's Event Upcall with
EV_BUFFER_AVAILABLE (see #03853,#03854) as soon as an Mbuf becomes
available. There will only be one buffer available Upcall, even
if this function has been called several times before.
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<h2>Int 7C/AX=0004h
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<h3><font color=#C00040>SK-UPPS Data Link Interface API - REQUEST BUFFER</font></h3>
<PRE>
AX = 0004h
DX = protocol ID (see AX=0007h,#03849)<br>
<p><b>Return:</b><br>AX = completion code (see also #03846)
0000h successful
ES:BX -> Memory Buffer (Mbuf) <a href="rb-7923.htm#Table3847" tppabs="http://www.ctyme.com/intr/rb-7923.htm#Table3847">(see #03847)</a>
</PRE>
<p><b>Note:</b>
If the DLI has no free Mbufs, it will set an internal flag for the
protocol and later call the protocol's Event Upcall with
EV_BUFFER_AVAILABLE <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #03853,#03854) as soon as an Mbuf becomes
available. There will only be one "buffer available" Upcall, even
if this function has been called several times before.
<p><b>See Also:</b>
<a href="rb-7924.htm" tppabs="http://www.ctyme.com/intr/rb-7924.htm">AX=0005h</a> - <a href="rb-7925.htm" tppabs="http://www.ctyme.com/intr/rb-7925.htm">AX=0006h</a> - <a href="rb-7937.htm" tppabs="http://www.ctyme.com/intr/rb-7937.htm">AX=0012h</a> - <a href="rb-7938.htm" tppabs="http://www.ctyme.com/intr/rb-7938.htm">AX=0013h</a>
<PRE>
<p>
Format of SK-UPPS Memory Buffer (Mbuf):
<a name=table3847></a>
Offset Size Description (Table 03847)
00h DWORD -> NEXT Mbuf (linked list)
04h WORD OFFSET of actual data within DATA area
06h 2 BYTEs reserved (currently unused)
08h WORD LENGTH of actual data found in DATA area starting at OFFSET
0Ah 2 BYTEs reserved (currently unused)
0Ch DWORD -> DATA area (size can be obtained via AX=000Eh call)
10h WORD PROTOCOL ID of protocol currently "owning" the Mbuf
12h BYTE IN USE flag; nonzero if Mbuf still in use by DLI (see AX=0006h)
13h BYTE RECEIVE STATUS (bit 0-7 only; see AX=0007h - Receive Upcall)
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