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Any particular DOS version required?

OK again - to clarify - the ADB chips are pre-programmed PIC16CR54's. I made an adapter board to use the newer PLCC ADB in place of the DIP part (which is only used on the SE). @Branchus has used one of these adapters in an SE and it worked fine. The adapter PCB is open source, you just need a...

One little trick is to get a 40mm fan - one with a passthrough molex connector on it for power and use the CD drive power cable. These fit perfectly inside the heatsink and do a nice job of keeping them cool.

I'd leave it be - however, eventually it may be worth looking at all the legs under a scope and prodding them with a small plastic spudger tool to see if any move. I believe @Mac84 had to do this to make a daystar PPC card work.

Anyone on here into No Man's Sky, at all? I just spooled up a Creative instance, for the first time since 2020, and i'm enjoying it so far, it's a definite time sink though.

Question - if you rest the heatsink on top without putting the clip on, does it still chime? I have a theory that the CPU itself may have a weak leg somewhere, and the clamping force is making the CPU legs buckle/lose contact.

Hmm, are you sure the PSU is good?

Hi! Can we get a little more detail on the machine? Would be useful to know what year/model it is - have any pics? :)

That's from Larry Pina's Dead Mac Scrolls

If you want a modern replacement, @Stephen made this: https://github.com/Stephen-Arsenault/CloneyClip

Aha! Time for this resource to come into use: https://tinkerdifferent.com/resources/the-smd-codebook.31/ So that's an H6 transistor, which equates to a BCW89R - these are NLA, but, doing some searching around and there's something that'll do the same job and even have a little better current...

Anyone want a Power Macintosh 6100/66 AV?

OK, so i've been to sleep, woken up and these are the Apple Checksum's for the ROM's: SE (800k): B2E362A8 SE (FDHD): B306E171 Wierdly, they share the same Major version, sub version and sub-release number - only the checksum differs. The Apple checksum is calculated by taking the low 32 bits...

Yes, yes, yes and I'm not sure what the checksum is off the top of my head.

Well...the SWIM chip might be a different form factor, but the chip itself inside is identical. I made an adapter, but i've not been able to properly test it. Just adapts a PLCC44 to a DIP28.

Incorrect. Just need to swap in the chip. The ROMs and IWM/SWIM are socketed.

The datasheet is for the PLCC20 part (343S0042), but that's identical to the silicon in the DIP8 part (344-0042 or 343-0042). Every other spec there is the same as the DIP-8 part.

The DS1307 is not the same. PRAM size is too small, for one. Needs to be 256byte at least.

Voila, the SWIM die shot: https://siliconpr0n.org/map/apple/344s0061-a/single/apple_344s0061-a_mz_mit20x.jpg

The SWIM chip is totally different from the IWM - however, the SWIM *contains* an IWM, and there's a crossbar switch that selects the relevant hardware inside the chip. The IWM is essentially a consolidated Apple Disk II controller card this is well documented. Anyone that knows CPLD's, such...