So I have a bunch of very old stuff that I need some help with or general info on.

Item 1: PERSYST Time Spectrum 384 card.
Battery damage. Removed battery and all chips. Cleaned up well. Some of the memory sockets damaged (part of the pins eroded off).
Attempted to put it in a laser XT PC and it came up with 'memory error'. I dunno if this board is even compatible? Were these things designed to provide extra (>640k) memory or are they designed to work in boards with no built in memory?

Item2: Laser XT PC.
It turns on, throws a keyboard error (no lights) but still seems to respond to keypress? Have tried different AT keyboards.
No drives, just the case and a video card.
I think I have an FDD controller for it, but can't make it work. I think I am using a 720k drive but can't be sure. It has an adaptor to plug the XT style connector in. Just comes up with disk error 80.
The card is an MT-881 (no battery) and looks to be in good condition. I guess I had better take a closer look at the drive I am using. Should this card run a 1.44mb floppy (at up to 720k only of course).

Item 3: 10mhz turbo board
ALMOST identical to http://www.minuszerodegrees.net/manuals/DTK/D … 7s%20Manual.pdf - some very minor differences in the diagram.
Turns on, but wont recognise any AT keyboard. Has 5v in all the right places (CLK and 5v) .
The reverse side of this board is pristine. The top has some severe discolouration as it was found with a thick layer of dust. I think all of the traces are good. Keyboard chip is soldered, not socketed 🙁

Item 4: Miniscribe hard drive and a few similar
I don't understand the relationship between these old hard drives and their controller cards. Am I right in assuming the card has to be designed and configured for that specific HDD in order for a generic XT to boot from it?
I know a lot of people use CF cards these days but it would be really cool to get these working. The miniscribe drive spins up and sounds awesome hehe.

Item 5: Adaptec 408106
Will this controller card work with aforementioned hard drives? It doesn't appear to in my limited testing. Can only find limited info. It seems like it could be SCSI?

Item 6: 6181682XM card with a weird 40ish pin connector on the front (like a big parallel port) and an old 5-1/4 floppy connector on the back. Some type of floppy controller? Maybe I should try this with with the other drive I mentioned in item 2.

Also got a bunch of random video cards (most seem to work) and a few other oddities (cards with just ports on the front etc).

As cool as I find this stuff, I'm more comfortable with 386 onwards as that is what I grew up with so I never actually learnt much about these things. Is any of this stuff particularly valuable? Might be better of selling it to someone who can make it work.

Thanks