With 128K the OS is forced to swap out program segments to the 400K floppy, and it is SLOW! Click to expand... It's my understanding that the SegmentLoader only read program se…

To get the board to work (as 128K) you need to plug 74LS244s into the 2 big sockets, and resistor packs into RP2 and RP3. The resistor packs need to be 10 pins each with 5 individu…

Now as you can see from the pictures, there are two chips missing/removed from the mobo. My question is, can i still start(power on) this mac without the MacMemory RAM board? ... D…

Your Mac shows 512K because it has the original 64K ROMs most likely. You actually have 1.5MB of RAM installed, it looks like. The mobo RAM chips have probably been replaced upgrad…

I have some spare 64K ROMs from dead boards, I should give it a go. Surely it couldn't damage anything? Click to expand... It ought to be safe. The 64K ROMs will only recognize…

I believe this details the procedure: http://68kmla.org/files/classicmac2.pdf I have no idea if the 128K SIMMs work with any Mac. Click to expand... Now if only you had…

...After you remove the RAM board, make sure you adjust the voltages which will fluctuate after removing the draw of the expansion board. ... Click to expand... How do I adjus…

I have no idea if the 128K SIMMs work with any Mac. I suppose I could try, though. At worst, it'll beep at me. (I could try it in pair with a couple known-size SIMMs, it would b…

Agree with H3NRY. Almost all upgrade cards required 512K on the motherboard. However, correct me if I'm wrong H3NRY, a few bypassed the logic board altogether? It would be the exce…

The SE/30, with its eight banks, could do 1.5 MB, as 4x256 and 4x128, although I don't think 128s were officially supported, and were exceedingly rare. (I think I have two of them,…

2x256+2x1MB, Click to expand... Of course, that's 2.5MB! :I

I recall the Plus supported 256KB SIMMs and 1 MB SIMMs, in any combination of pairs. So 2x256 (which would be strange, since it's lower than it shipped with,) 4x256, 2x1MB, 2x256+…

What is the possibility that the mobo RAM chips were not upgraded to 512K? Click to expand... It is possible, but since it was much more common to upgrade the motherboard than …

Basically, I am, but I'm not. Like, I can use it, but I have to put up with my parents telling me about how Tracy Grimshaw or whoever the hell it is that does A Current Affair thes…

As much as I'd love to take it up to say, a gig...I can't imagine being able to find 2 512MB PC133 sticks around here for anywhere near a price that I'd want to pay. Click to ex…

Another note, I use tiger as my OS of choice on my 350MMHZ Slotloader and 'tis is fine.

Your Mac shows 512K because it has the original 64K ROMs most likely. You actually have 1.5MB of RAM installed, it looks like. The mobo RAM chips have probably been replaced upgrad…

"Software for processor cards in PCI power macs is not *required* since it replaces the original processor. It will run just fine, except Apple System Profiler may not display the …

Austin's Goodwill Compter Works is excellent, and there are several other computer recycle / resale operations, as you'd expect in a university town. Click to expand... What ar…

Well scored there LCGuy! Getting the machine over 512MB will make a big difference in OS X - but it should still run adequately. And they make great DVD players, especially with th…

Success! It turns out that the problem was two-fold: first was the PRAM battery, second was a SCSI conflict. Both are two really newbie mistakes which shouldn't have taken 5 month…

Nope. No green lights inside a stock "Macintosh" or an OEM upgrade. If you have one, there's something undeniably foreign inside there. Can't imagine why there would be one inside …

Should a 'Macintosh' show a green light in the drive bay?

JDW, that's if you have a boot floppy present. Just looking at the machine, assuming it doesn't power up, or don't have access to power. If it does power up and you don't have a 40…

Awww, man. That Goodwill maintains a museum. Guess where all the really good vintage stuff goes. Click to expand... Yeh, but they have more S-100 and pre-1980 stuff than they c…