Category: <b>network</b>
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<pre><b>INT 61 - FTP Software PC/TCP - TCP/IP TSR System Call interface</b>

	AH = system call number (also see entries below)
	    01h "pkt_alloc" (v2.05; this is "net_config" in v2.1+)
	    02h "pkt_free" (v2.05; this is "get_kernel_info" in v2.1+)
Return: CF clear if successful
	CF set on error
	    AL = basic error (see <a href=../../it/19/33.html>#03319</a>)
	    AH = suberror number (see <a href=../../it/20/33.html>#03320</a>,<a href=../../it/21/33.html>#03321</a>)
InstallCheck:	test for the signature "TCPTSR" three bytes beyond the start
	  of the interrupt handler
Range:	INT 20h to INT E0h, selected by configuration
BUG:	the SLIP kernel for v2.05 bounds-checks the wrong register, so values
	  greater than 54h in AH may crash the system.	Other kernels may have
	  this bug as well.
SeeAlso: INT 61/AH=00h"PC/TCP",INT 61/AH=2Ah,INT 61/AH=54h
Index:	installation check;PC/TCP

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