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Nice work. I was briefly considering asking, "why not just stick an '030 on an LC board? Same thing," but then I remembered there are actually a few notable differences, primarily the 68882 socket (pads, at least) in the LC II and dual floppy support in the LC but not both in the same board...

The accelerator is an especially good find. I have a bunch of those video cards; seems 90% of Japanese SE/30s ended up with one. They're pretty decent. Too bad they never did an internal video option with them like the Micron cards had.

VRAM SIMMs for the HPV card are pretty much the same as those of previous models Macs, depending on which type you find: the 7100's card had 1MB soldered and used 4x 256k (though I think you can get away with just two) sticks while the 8100's had 2MB and used 4x 512k sticks. You can use 512k...

OS 9 may be a driver problem because if there are no drivers it's fine (except for the occasional 256 color thing) but when the 9250 drivers load the screen starts getting crazy and it's unusable. Without the drivers, though, there's no acceleration so it's kind of useless for dual-booting...

That link isn't entirely a bad read but I think they have a few bits incorrect regarding CPU caches: Cache hierarchies generally go with the ones closest to the processor first and work their way out, not weaving around as described on that thread. So the CPU's L1 cache is of course first (since...

Older SDRAM-based models like the QS and earlier used bus-sync'd RAM, so matching RAM speed to bus speed would be a concern there. However the MDDs used 333MHz DDR regardless of bus speed (it's fixed to its own clock, not CPU bus clock) so it shouldn't be an issue.

Apple's Power Manager system is kind of weird in that it won't allow the PRAM battery to charge until the main battery reports a full charge (regardless of whether its full charge is 2 hours or 2 minutes). So, no or a bad main battery = no PRAM battery charge regardless of whether the battery is...

A while back I picked up some low profile Radeon 9200-series graphics cards for Cube use, both 128MB but one a 9200 and the other a 9250, may or may not be the not-recommended (for reasons currently unknown to me) LE or SE versions. Recently I decided to try to flash them. I got the 9250 to...

I bought a few of the China-origin 40MHz 68882s a while back. Fortunately they are, at least, actual working 68882s; I've heard of people getting chips with the same PLCC package but that are either non-functional or entirely different internally. I don't plan to run these any faster than 33MHz...

Valiant efforts but I'm not sure I see a huge benefit here, at least not for most people who just fire these vintage things up for old games or reading recipes Grandma typed up 30 years ago. Every 6~11 years the calendar repeats, so just figure out what year to set to sync the date and don't...

I think we have some other power supply threads in the various forums that cover a good bit of these topics, especially in the Hacks & Development section for building replacement devices. Good to see more progress though. Essentially the following should interchange either directly or with...

That's not the sub-$100 that OP was looking for but it's not the most exorbitant price for a Cube GF3. I'm in the middle of messing with a couple R9200s. They're both the low profile variety and I think one may be the SE that they say to avoid but it was like $5 so I bought it anyway...

Those transformers usually use "universal" combination Schuko/US sockets. See if you can find a US to Schuko adapter locally, grounded or not (the ungrounded 2-pin variety will probably give best fit). One of those should give you enough lift to plug in the wall wart. Alternatively maybe find a...

Electrically? No problem. Just slap it in and it'll go (assuming you've set IDs and termination properly). Physically? That's not so straight-forward. This is one place where the plain clones were markedly better: you could put in whatever you want without worry of finding and matching bezels...

I didn't see any pictures of it, so did it come with the Workgroup Server PDS Card? Should've been a big card that slots into the slim black PDS and provides fast SCSI and a L2 cache. Without that you've basically just got a regular Quadra 950; the PDS card is what made it a "real" WGS 95.

The official Sonnet Cube upgrades came with a fan, a low-profile type about half the thickness of a normal PC fan (I think it's 80x25mm). It bolts to the stock fan mounts on the bottom of the case and plugs into the stock fan power on the VRM (the Cube was intended to have a fan but of course...

The Alchemy-compatible Boosters were tiny, weren't they? Easily the smallest of any of those L2-type processor upgrades. Sonnet's L2 cards were a little taller which made them a tight fit in some applications, especially mods such as Color Classic PPC where a good chunk of the inner frame above...

Wasn't there something about different versions of networking software (specifically MacTCP vs. OpenTransport) wildly affecting transfer speeds? There was no mention of what OS is in use here. Maybe try benchmarking under different OSes, specifically OS 8.1, to see if there are any differences...

Basically you can figure out per-side capacity depending on if the disk is rated for SS or DS operation: take it at face value for SS or halve it for DS disks and that's what you're looking at per side. So if a disk says 180k SSDD, that means it has 180k of storage on its single side. The same...

In the mid '90s IBM was developing a CPU (PPC 615) that could execute both x86 and PPC code natively. It was apparently never fully developed but it was intended to go into a mostly standard Super 7 board which would basically turn it into a CHRP-compliant machine if selected to operate in PPC...