PC Setup

• We install one, two or three 3COM 3C509B 10Mb or 3C906B 10/100 ethernet cards, depending on the version we're building. Once you get them in the box, you won't be able to tell them apart from the outside, so we put them in the box in numeric order of MAC address.
• We install Caldera DR-DOS (OpenDOS) or occasionally MS-DOS 6.22.
• We create a 3COM directory and recursively xcopy (xcopy /s) into it everything on the diskette that comes with the 3COM ethernet card. The commands are typically:
  • c:
  • cd \
  • mkdir 3com
  • xcopy /s a:. 3com
• We run the 3COM "menu" program from the 3com directory and use it to install the packet driver program into the root of the C-drive. For the 3c509 card, this is 3c5x9pkt.com; for the 3c905, it's 3c90xpd.com.
• Also using the 3COM "menu" program's diagnostic and configuration program, we configure the ethernet cards as follows. Remember, you may not have as many ethernet cards.

  Card number	I/O Address	Interrupt Number
  1	0x300	10
  2	0x310	11
  3	0x320	12

• Editing autoexec.bat, we add the following lines. The number of lines depends on the number of ethernet cards.

  Using 3C509 NICs

  Card number	Added line to AUTOEXEC.BAT
  1	loadhigh 3c5x9pkt 0x60 IOBASE=0x300
  2	loadhigh 3c5x9pkt 0x61 IOBASE=0x310
  3	loadhigh 3c5x9pkt 0x62 IOBASE=0x320

  Using two 3C905 NICs

  These are PCI devices and need the bus number (parameter "K") and PCI device number (parameter "S").

  Card number	Added line to AUTOEXEC.BAT
  1	loadhigh 3c90xpd /I=0x60 /S=8 /K=0
  2	loadhigh 3c90xpd /I=0x61 /S=9 /K=0

• Editing config.sys, make sure that "DOS=HIGH,UMB" is there.
• Run memmaker, using the default responses to all questions.
• Insert the DialNAT or NetNAT archive diskette in the A: drive and run a:setup. Check the NetNAT Archive Instructions or the DialNAT Archive Instructions page for step by step help. The installer in the archive takes care of directory creation and initialization.
• There will be a sample config.sys and autoexec.bat in the NAT's runtime directory (either c:\netnat or c:\dialnat) that you may use for reference.

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