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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...

I have to say that lower floppy bay looks very, very cleanly done.

Paging @eric

Yes, by it's nature - SANE is what all apple apps use to 'math'. This will redirect all calls to that library and direct them to use the FPU to do the math.

@JDW this would be good to run on that SpeedCard - force the usage of the FPU!

Looks reasonably doable - although, the 2.5" scsi disks would be impossible to source - would be better to adapt the design to something like the BlueSCSI instead, then you can simply do a case design - no need for external power, either - if @PotatoFi's mini mac II case for Raspberry Pi's is...

This weekend, I was thinking about the fact we're at 700+ members and some of us might also game, on some platform or another. To this end, i've made a simple spreadsheet here if you want to add yourself and open up your friends list. I've added my name to the pot already :)...