From personal experience, I think Realtek based cards might be easier to get going in 8-bit mode, but I could be wrong. If you can’t find a sticker on the card with the MAC address then the MAC address reported by the packet driver should at least match the range assigned to the manufacturer of the card. I loaded trumpet tcpdrv. This isn’t really unexpected behavior. For example, a card that starts with “” belongs to 3Com. Just curious, does anyone have a “pre-programmed” hex file to program a eeprom with these settings?

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Connection from a DOS-system using TCP/IP

Would this be viable to put a AWE32 soundcard in anor does it use the full bit on card for audio? Not an exact analogy but you get the idea. One thing to keep in mind is that dod it worked for this card, getting a 16 dox card working in an 8 bit bus is not as easy as fixing instructions. In my excitement to get a nic card with an RJ45 connector I purchased a couple on eBay before reading to the end of the thread.

So what was done was to rewrite the packet driver using compatible instructions, using the network card in the 8-bit mode that 3Com partially designed it to be used for. That is the reason why I modified this packet driver, I have some spare 3cB cards and as the packet driver source code was available, the work was not too complicated.


There is a troubleshooting document included with the mTCP distribution; maybe it has some hints? It should work an a real as-is. I have ds few machines that need a NIC.

This disclaimer is brought to you thanks to the BSA. Just wanted to share my success with this modified driver. Maybe if someone implements a specific input routine EXE this is a link to it, i could not attach as it would not let me attach a zip larger than 97k here for some reason: With all bits set FF: Unfortunately, I only bought enough for my needs.

Mike I just tried the packetdriver with my card and a D-link DI router using a lan port but without any wan connected DeksorGoogle [Bot]hard1kjheronimustayyare and 12 guests.

EXE will run to disable plug and play? This will help some people with the card as the whole driver not running on an has been a big issue.

Thank you hope it work full way. Not a drama for me, because I don’t like networking on anything less than a anywho. I used TASM 4.


3Com 3c509

I wonder what’s preventing me from going further. Thanks in advance of any assistance. But it doesn’t have to be forced to made to work for your needs. I’ll tinker with this bit tomorrow and see what I can come up with.

My configuration settings are as follows: Sharing is caring ya know. Here’s a picture of the board with dod VRM installed, outside of the case. In my case, it’s on a homebrew computer system Flea86 with a some basic 8-bit ISA support bolted on. Packet driver appears to be working, so two things come to mind: But i do not manage to connect and ping my D-link router unfortunatly i lack twisted pair to 3xom connect another computer directly.

3Com 3c – Wikipedia

Thanks for the upload. But does it really work, the drivers loaded and configured for sure, but i can not reach the router. Users browsing this forum: There is no material that is knowingly dox here.