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There's these four I'm familiar with:

Lantastic-Z

DOS Interlnk - Intersrv

LapLink

U - N E T II

Check for possible corrosion from a nearby battery.

Put an MS-DOS 7 boot disk in it. If it boots it's a 386+. Doesn't get much simpler.

There's always the possibility of running a parallel port network network and saving a slot for something else.

There is no way to ascertain that visually on a multi-layer board as you can't see what's happening on the inner layers.

Now there's a definitive statement! :-)

Putting all the fantasy-based possibilities aside it seems the best option is to locate another functional 5153. I realize that does not sound all that promising at this point but at least it's ...

Looks like you've got two boards of unknown operability as well as identity to trade for a working board which is tantamount to a crapshoot.

Ditto... static bags, boxes and a small database or text file log.

I've found that many of these MFM drives will format perfectly (or so it appears) right up to the end of the process. The only problem is that they actually didn't (format) and they don't work or...

I've got an old version of WIN 3.0 on a 1.44 disk. It's running Usher by George Browning.

... or ditch all that CF nonsense and get a DOM -- it's headache free hardware.

Got a video of that or is this this just more of the usual hyperbole? :-)

Take a chip to Lowe's or Home Depot and get an exact match in seconds. They have paint computers there. :-)

You can also load with an IDE drive or two.

My experience with the USPS is more encompassing in that everything I've sent has traveled well and that includes First Class, Parcel Post, Priority, Flat Rate Priority and Media Mail. I've also...

But not new/blank ones. This rate is for disks with some useable data on them only.

What about using DOSBox Debugger or something similar?

So will a screwdriver. :-)

I don't think a DDO will help here for anything over 8GB since that requires more than the standard Int13h interface, i.e., enhanced interrupt 13h extensions. Enhanced Int13h extensions require...

Have you had a look at U - N E T II? It's a full parallel port client/server network. Maybe it could give you some pointers.

Like Malc says, USB floppies tend to have issues. Sometimes they seem to work more reliably after the machine has been freshly booted. Unquestionably the best situation is to use a machine with an...

in binary either.

There are zero slot clocks that plug into the CPU's socket.

I used to run the local Bar Association's 4 node PCBoard BBS on a 486 with Desqview.