apple Lisa2. One working!! - one to go?

On 12/08/2010 04:47 PM, Terry Stewart wrote: XL just stands for Ex-Lisa. Apple tried to imply Extra Large, as in it looks 2x as wide as a Mac 128, but insiders have mentioned Ex-Lisa repeatedly. Right, that board is needed only by the Lisa's that have a battery pack on the I/O board. Might just need an OS installed, which of course you'd need to fix the floppy issues for. There's a wonderful test suite called LisaTest, but of course, it's useless without a working floppy system. Check the obvious first, make sure the floppy cable isn't inserted backwards, etc. Try swapping the floppy drive to your other working Lisa to see if it works there. At least that way you can eliminate it, though your symptoms are obviously not the drive itself. It's perfectly normal for Widget (and ProFile) drives to take upto 5 minutes to become ready. On powerup, the drive starts scanning for bad sectors. The drive light is a "ready" light. That is, the LED turns off when it's active (or flashes) and turns on steady when it's ready to go. The fact that you're seeing this behavior is a good thing. But 82 means the drive isn't answering, could be a Widget controller issue. http://lisafaq.sunder.net/index.html#lisafaq-hw-hd http://lisafaq.sunder.net/lisafaq-hw-rom_error_codes.html I've never heard of E8. It's either 88 or A8. It may be that you have one that has the 800K floppy hack ROM, though, no one has reported those has having a different ROM version, is your monitor ok, are you perhaps misreading A8 as E8? If not, it could be the ROM might be corrupted. Looking at the boot ROM source, 57 actually means: "57 = bus error accessing disk controller" This means that the Lisa ROM attempted to access the 6504 when the 6504 was busy. There's a signal that prevents the 68K CPU from accessing the floppy RAM while the disk controller is busy. If it tries, it gets a bus error. This is the DISKDIAG line. There's another bit of code where if DISKDIAG is held too long, it will issue the same exact error. Either way, something's wrong with the 6504 disk controller circuitry somewhere. So more than likely, something is wrong with your I/O board, possibly the ROM, RAM, or 6504 CPU are bad. If you can, find another I/O ROM, I think you'll want version 88 for the Lisa 2/10. If you're able to locate the ROM dumps and burn your own EPROMs, that might be another option, it would at least be something to try. The ROM is socketed, and usually labeled with a sticker that has the version number and says "Copyright Apple" somewhere ot. Check the label on it, I'm guessing it would say 88. If you actually see E8, you might want to get a dump of it as it's unknown to me, and might be useful. If you see SunRem or Sun Remarketing or anything like that, that might be the 800K ROM instead. 88=10001000 A8=10101000 E8=11101000 So that's a single bit difference if that ROM was supposed to be A8, but AFAIK, A8 shouldn't be in a Lisa 2/10, that should be 88. Or we could have random corruption on the ROM, it would make sense that DISKDIAG is held locked if this is the case. The shared RAM can also be an issue, as could the IWM chip. It would be great if you had a spare I/O board for the 2/10, because at least you could swap the socketed chips back and forth to see what it might be. A known good board to compare against would be helpful. But if you don't, I'd try to get a replacement 88 ROM, if that doesn't work, try replacing the RAM chips. A spare IWM would be impossible to find - you'd need another 2/10 I/O board for that. Hmm, you might be in luck: http://www.vintagemicros.com/catalog/index.php has I/O ROMs in stock, sadly, no whole I/O boards, but if it is the ROM, that's a very easy fix. You might also want to ask about this on the LisaList as there are a few very knowledgeable Lisa HW folks there that aren't on here. http://groups.google.com/group/lisalist?hl=en_US Let me know if you find anything interesting so I can add it to the LisaFAQ.