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Are you actually looking to do work with Matlab, or is this just for fun? If (for whatever reason) you need to run an old version of Matlab for work and need real performance, I would suggest trying it under Basilisk II first (be sure to use a ROM from something in the IIx or higher range)...

Worst comes to worst; you could always get an external case for the drive...

According to the datasheet; the 53C80-40 is just a higher speed version of the 53C80. As long as they are the same form-factor, I think it will work without a problem.

Early error correction wasn't nearly as robust as modern devices have. A fair bit of early weirdness was traced back to just that. Usually, when a marginal sector is detected, it just gets silently moved; but if it has developed multiple bit errors in both the main data and the ECC bits -...

HDDs are lossy storage devices; even back then they used error correction codes to function. It could well be a sector that's marginal; and for whatever reason the error correction is intermittently returning something non-printing in the affected locations of the "It is now safe to" string...

Well, here's a preliminary board layout. It accepts either a 4-pin disc drive power supply or an ATX power supply (a PicoPSU or an external full-size ATX boxed power supply); and has pads on it for a MornSun isolated DC-DC converter wired up to produce -5v for the serial chips. I don't have the...

And early 2000s it looks like (iLife/iWork). Some LC PDS video cards?

I'm also cooking up an LC PSU adapter. I'm looking to minimize the number of wiring harnesses that need to be crimped together, however; so I located the Molex part number for a board-mount counterpart to the KK396 connector on the logic board. Molex 09-48-3076; Mouser 538-09-48-3076. As of...

I think it’ll hang in there, even though life may be a bit harder. ‘Cuz ya know… it isn’t easy, being green… 😉

M5521 = Slot Loading CRT iMac https://everymac.com/ultimate-mac-lookup/?search_keywords=m5521

Or even a new router or switch, if it's configurable to disable auto-negotiation on a per-port basis.

ROM, and probably the PALs also.

That logic board has no memory expansion sockets. The few memory expansions that were available are pretty major modifications to the machine; all involved de-soldering the 68000 CPU and putting a special board in it’s place. That board would have a 68000 (usually new), PALs for doing address...

I was pretty sure it was a PIC that their code ran on, but if it's got the requisite protocol laid out, I could start from there and cook up something suitable...

I'm absolutely positive that this has been posted before; but both the site search and google are not turning it up. Somebody had extracted or reverse engineered the code for the SE/30's RTC, and posted it somewhere. Anybody remember where???

Just based on the photos, I think it’s fixable; but the results will be rather ugly. You will probably end up with a bunch of bodge wires going from place to place. It won’t be difficult to do (in the sense that climbing Everest is), but it will be tedious and time consuming - you will need to...

The processor is not running; got hung in ROM before it could initialize the RAM, or can’t write to RAM for some reason. That pattern is what the contents of RAM looks like when power is first applied after being turned off for a while.

Close - DB9 was also used on the Mac 128k, 512k, and 512ke. The mini-din 8 didn't come into use until the Plus. CD drives (well, all drives other than floppy drives) on Macs from the Plus to the Quadra 630 (which introduced IDE internal hard drives) were SCSI, not serial. However, both serial...

IIRC, that was done as part of the MonsterMac installation process?

That actually comes from before the Mac existed: originally, serial ports were designed for modems, so in addition to the lines carrying the data (send, receive, and signal ground) there were a bunch of control signals for the modem. As the serial ports were later used for devices other than...