Add (not working) ThinkPad 600X, 760XD, and 770Z laptops

[clawgrip]

New systems marked not working

IBM ThinkPad 600X [ArcadeHacker]
IBM ThinkPad 760XD [ArcadeHacker]
IBM ThinkPad 770Z [ArcadeHacker]

Also added RTC, MCU clock and notes.

[angelosa]

I don't think I like the driver naming direction this is taking off.
I gave a glance at ref catalogs, everything between 200 and 799 uses an Intel CPU (jumping between ISA/MCA and then PCI), and I believe the IBM classification has more to do with form factors than anything else.

As an example: the ThinkPad 760XD maps a 82430MX PCI chipset, that's shared with ThinkPad 560, so this driver should be named thinkpadx6x.cpp by following the model number logic.

[angelosa]

Related to #13016 , which will most likely throw a git conflict either way.

[cuavas]

@angelosa can this be salvaged? Does this mix multiple generations/product lines that should be in separate files, or is it a single generation and the source file just needs renaming? Do you think you can make the adjustments on the PR branch? It’s really little more than a squeleton driver at this point.

[angelosa]

It's not a skeleton, the driver is for PCI era ThinkPads (there are a ton, I've sent you a document in PM).
afaik they mix and match various chipsets with IBM laptop devices, with H8/3437 as keyboard CPU. Had this at some point, iirc before attaching the Super I/O and with a VGA connected:

[angelosa]

That to say, it's been 9 months of no comms from #13016 , so your take about what to do here.

[cuavas]

That to say, it's been 9 months of no comms from #13106 , so your take about what to do here.

If you think you can salvage it, then I’d recommend you merge master into the PR branch and then do the minimum to get it to the level where you can merge it without wanting to cry.

If that isn’t possible, maybe just add squeleton drivers to hold the ROMs on master and close this PR?

[angelosa]

Busy with MD plus current master emumem breakages doesn't make me eager to look at the other one for now.