I'm attempting to get NFS v2 file sharing client via XFS, and mTCP TCP/IP stack, running under MS-DOS 6.22. Using my packet driver for RTL8139 (RTSPKT.COM), I CAN get either/or running, but not at the same time. I'm running DOS only, not Windows 3.11.

I've been reading that PKTMUX may be able to help here -- from the XFS docs:

1 If you're using PKTMUX,  because you must  multiplex more then one Packet Driver  application, the  best solution is  to load PKTMUX at XFS's multiplexor interrupt:
2
3          ne2000  0x60  // or other shim
4          winpkt  0x60  // for XFS
5          xfskrnl 0x60
6          pktmux  2 62  // 2 channels, at interrupt 62
7          pktdrv  63    // for your first PD application
8          pktdrv  64    //          second
9          win           // start Windows

I don't need to load Windows, so I omitted WINPKT/WIN parts, but I still can't make this work (XFS and mTCP each work when loaded individually, but not together using PKTMUX). What am I doing wrong?? Thanks for any help.