So a while ago one of my contacts sent me some photos of available stuff, and there it was, the one that you don't know you're missing until you see it: a Socket 4 board! It was an Intel Hendrix in a very good state and I was excited as this would be my first contact with this platform. Unfortunately, no CPU on board so not much testing I could do.

Meanwhile I searched the 'net for a compatible CPU, and few days ago I found on Ebay for an ok-ish price a SX948 Pentium-60 together with its cooler and a defective Batman's Revenge motherboard. Stuff arrived to me recently and I was able to test my board. Things didn't go very smooth as I encountered the bug where you cannot enter Setup - board freezes when you try, and the display on the POST diagnostics card would show all gibberish (or maybe digits in a very rapid succession). Thinking it might have something to do with the depleted Dallas module I proceeded to mod it, adding a CR2032 battery on top of it. Still, the problem persisted, but seeing that the board would happily boot from a floppy I've connected a drive and it loaded MSDOS without a problem. Using the date and time commands returned some weird values, and changing these to some more earthly ones cured the board of the freezes when entering Setup. I managed to run some tests (under DOS), board seems perfectly OK.

Now, the dead Batman is a whole another story, one of the most botched repair attempts I've seen. Seems like someone tried to unsolder the Dallas module using a propane blowtorch or something similar. On both sides of the board. There is widespread damage, not at all obvious on the photo. Both white SIMM slots are warped, some chips around the Dallas have "migrated" from their proper position and there is an area the size of a small coin where the PCB has swollen (de-laminated?) because of the heat. Amazingly, the board booted in this sorry state, although just once and the keyboard wasn't connected so I couldn't do anything. The very small movement when connecting the KB was enough to de-stabilize it and it never started again. (Photo taken after I unsoldered the work-of-art Dallas)

Best part? The person that did this didn't even connect the battery properly on the "modded" Dallas (used pins 16 and 21 instead of 16 and 20) 🤣

I don't think the Batman is beyond repair, but I don't know when I'll have the time to try and fix it, so my next project will be centered on the Pentium 60 - Intel Hendrix combo and this spawns a few questions:
First, is there a manual for this board / does it have an "official" name, because I suppose they weren't being sold as Hendrix, Batman and Joker back in the day (or...?). Stason page about this board is like 80% accurate, there are some unaccounted jumpers.
Second (but somehow more important than first), would it be possible to enable PS2 mouse support? There are solder pads for two mini-DIN connectors like on the Batman board, but it came from the factory with the 5-pin DIN soldered over them. I can't see any parts missing except for three SMD inductors, three capacitors and the connectors themselves, but I believe the BIOS must support this as well. There is a mouse option on the main Setup screen, but cannot be changed from "not installed". What would be the options? Hendrix seems to be such an uncommon board that I don't expect to find for it another BIOS with PS2 mouse support enabled; maybe take the chance and flash it with the Batman's BIOS?
Third, how bad is the CMD 640 IDE controller? Are there workarounds for its bugs, or another PCI IDE card is an absolute must?