Digital EtherWorks/MC Card

@6DEF - Digital EtherWorks/MC Adapter (DE212)
@628D - Digital Ethernet Adapter (a revised version of the EtherWorks/MC?)

Installing The Card
If You Can't Boot Windows After Installing The Card's Drivers...
Which Card Do You Have?
Using an AUI Transceiver

This page covers my own personal experiences with getting some Digital Etherworks and one Digital Ethernet Adapter (see card IDs above) from a local hamfest into good working order.

Despite that fact that Digital Equipment was purchased by Compaq, Digital Networks is still around and is a separate company. Don't go to their site expecting much in the way of drivers.
OS Support

Windows 3.1x and 9x have support built in. Supposedly NT 3.x also has drivers.
NT 4.0 does NOT have drivers, but according to DNPG the 3.x drivers can be used.
I don't know at this point if Linux and OS/2 have drivers for it or not.

Digital EtherWorks/MC for Dual Media (UTP and Coaxial)

EtherWorks MC Dual Media

Digital Etherworks/MC for Coaxial Cable (Also has an AUI port, which the

dual media card above lacks.

Digital EtherWorks/MC Coaxial

Digital Ethernet Card (adapter ID @628D)

Digital Ethernet Adapter


E6 Lattice PAL 20L8BCNS

E10 Lattice PAL 16R8ACN


E17 Signetics 2126X07

E19 Mitsubishi M5M5256BFP

E20 Mitsubishi M5M5256BFP


E47 AMD AM7990PC/80

E52 AT&T T7220PC

E53 PE-65421

E69 Lattice PAL 20L8BCNS

Y1 20.000MHz OSC

T1 Transformer

C12 & C13 Capacitors

SMPS - Small Switchmode Power
Supply. F1 in diagram above is the


W1 - No Idea
J2 - Pins 1-2 jumpered for twisted pair cable, 2-3 jumpered for coaxial cable
W2 - No Idea

Both W1 and W2 are jumpered on my adapter.

Installing The Card

Requirements: The ADF for your particular card (both cards pictured above use @6DEF, the Digital Ethernet Adapter (not pictured) uses @628D for an ADF. Get the ADF files from the links above. It should go without saying that you must also have the card itself, a PS/2 computer with an MCA bus, and an Ethernet network to connect the card to. You will also need your machine's specific reference diskette or partition on the hard disk as the case may be.

  1. Update your reference disk or partition with the ADF for this adapter by using "Copy an Options Disk. Then, turn the computer off, and install the adapter in a vacant 16 or 32 bit microchannel slot.
  2. Start your PS/2 and have a copy of the reference disk in the diskette drive. (For those who have PS/2s with reference disks "built in" on a hidden hard disk partition, the reference disk should start automatically.)
  3. When asked to autoconfigure, say "No". (Well, you can if you want, but it adds an extra step to the procedure of installing this adapter.)
  4. When the main menu for the reference disk appears, choose "Copy an option disk". Then, once you've done that, choose "Set Configuration".
  5. Once the "Set Configuration" menu appears, choose to autoconfigure from there. Ignore the warning that may appear about options that have been changed reverting back to defaults.
  6. When automatic configuration is done, choose to "View Configuration" and find the listing for the Digital adapter. Write down the I/O address and IRQ that the adapter is set to use. (This will be needed later, at least for folks running Windows with this card...)
  7. Exit the reference disk and restart the computer.
  8. Go about installing the adapter's drivers for your particular operating system. Use the information you took down in step 6 to configure the drivers so that the adapter will run.

If You Can't Boot Windows After Installing The Card...

This only applies to the EtherWorks/MC Dual Media card...the coaxial only card only has the W3 jumper, and it seems to have no effect on the card's operation...

This may also apply to the @628D Digital Ethernet Adapter as well...more on that if I try it...

This may apply to more than Windows, so read it if you are having problems.

I had two of these cards that wouldn't let the computer boot into Windows after installation of the device drivers under both Windows 3.11 and 98. One turned out to have a bad EPROM chip, and it worked again after "stealing" the EPROM from another adapter.

The other adapter, however, stubbornly refused to yield to any of my attempts to make it work. Everything looked normal, and even the real mode DOS driver loaded with no errors. But Windows would never boot. I figured the card had to be OK since the real mode drivers found it and did not complain.

I found the answer I was looking after much hair pulling, swearing, and enough ranting to shave a few minutes off of my life.

There are a series of jumpers at the end of the card that has the connectors for your Ethernet media of choice. Upon closer examination it turned out that these jumpers were in the wrong places.

So if your adapter is NOT working correctly, this is worth a shot.

Close up of the EtherWorks/MC for UTP & Coax

The proper settings for the jumpers above are:
W1: Closed
W2: Closed
W3: Over pins 2-3

so long as you're using UTP or STP cable...

If you cannot get the W3 jumper block to fit back over the pins, note the beveled area. Turn the jumper so that the bevel faces the unused block of pins. It should fit perfectly then.

The coaxial and AUI version of this card lacks all jumpers except W3. W3 is used on that card to select between thin coaxial or an external transceiver.


This card is only a 10 megabit card. (despite the fact that my Netgear 10/100 switch can't "figure out" the signalling rate of this card...) But it is still pretty respectable in terms of performance, as I have found that it outperforms both my 3COM 3C529 and 3C523 MC/TP Etherlink cards.

I have noticed that under Windows 95 and up that there is only a real mode driver available for this card. How much difference that makes, I don't know. This card hums along very nicely in a 9576-AUB, so it can't be much of a difference from those cards (like the 3C529 and 523 cards from 3com) that DO have protected mode drivers under Window$ 95 and up.

None of the Digital EtherWorks/MC cards or the Digital Ethernet Adapter card I have cause any problems with any PS/2 I've got them installed in, from a 55sx to 95a server with a Type 4 P90, so I don't think there is any speed sensitivity or limit with these cards.

Which Card Do You Have?
The simplest and easiest way to find out is to use the excellent QBMCA software from Peter Wendt to identify the card ID and name. However, if you don't have access to a PS/2 now, the "hard way" will also work.

The two different adapters (Digital EtherWorks/MC and the Digital Ethernet Adapter) are quite different in design.

These are some of the main differences in the cards:

EtherWorks MC Dual Media

Using An AUI Transceiver (Coaxial Etherworks/MC card only!)

If you plan on using an AUI transceiver with the coaxial cable version of the EtherWorks/MC card, just plugging it in won't work as it does on most microchannel NICs.

To successfully use your AUI Transceiver, you must change the position of jumper W3 (the big blue one) to the opposing pins that is not installed on now. To do this, remove the card, note where the jumper is now (so you don't put it back in the same place), turn it around, and place it over the other set of pins that are not currently jumpered. After doing this, your transceiver should work.

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