If you just want a functional compact Mac, then you would be better to get a 512k or 512ke motherboard until you can manage to get your hands on a 128k motherboard. The 128k is a v…

It's my understanding that the SegmentLoader only read program segments FROM the floppy disk, and didn't write them back to the disk. Is that true? Click to expand... Usually s…

I have to say that it will be a lot of work to get that board back to original condition or at least functionally original. The missing chips will have to be found and if the RAM o…

Could the Mac with this adapter take advantage of color in any way? Click to expand... Yes, it could. I designed it so the pixels were clocked out at 14.31818 MHz with color bu…

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…

A larger pic w/higher contrast Click to expand... Or a scan

A larger pic w/higher contrast so the chip designations are clearly legible would be a big help. Given that, and a good solder side pic, we'll be able to learn all there is to kno…

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…

Ah thanks for that H3NRY, that's right the first Apple ][ only had an NTSC output, that's why PAL was such a headache. I agree the board is most likely an internal scan converter …

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…

could this be a PAL converter? Click to expand... It could, but it could just as well be an NTSC converter. Since Macs have their own display, there's no native NTSC or PAL vid…

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…

Give THIS LINK a whirl. Just about everything you need to know well written should help you. Is this a 240V M0001WP European model? Or is it a 120V North American model? H3NRY, …

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+…

That's a most peculiar board. There are RAM chips it looks like, and it takes power from the MB power connector. Could it be a video card designed to drive a standard 9-pin CGA mon…

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 …

Hi all, Thanks for your replies. Here a URL with a picture, hope it works: http://img43.imageshack.us/img43/3598/img0659j.jpg or http://yfrog.com/17img0659jj What program shou…

Your SE/30 should be able to format an 800k disk as single-sided 400k format with System 6 or 7.