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Actually the procedure to deserialize the OS was pretty well described. See here for instance. It was the Apps for which I couldn't find anything too clear..

Since I spent so much time figuring out how to de-serialize Lisa diskettes, I figured I'd post the "how to" in order to perhaps help the community. There are a lot of bits and pieces on-line, but nothing really comprehensive. So here we go Of course, an easy way to go is to download the...

Oh, and we got the Big Macs award :D! And yes, all the exhibitors got an award !Those VCF guys, they know how to treat people well (y)

I was a bit concerned to keep the plasma screens operating for two 8h days, but they miraculously held. And yeah, I discovered after the show that the floppy cable was loose, and that explained some of the glitches we had. No @mazin07 , it was not your fault :)

So I received the Hitachi HN482764 EPROMs. I tried to burn them with my programmer, but the max voltage it could provide was 18V, and these chips require 21V. The AMD chips could be written at 18V, using several write cycles, but these Hitachi ones would not budge. So I used two small power...

Our "Colby" booth at the VCF-West event was very well attended. Some of you showed up, and it was fun. See pics from the booth below. The first one shows a MacColby, Walkmac, Walkmac Tempest, Cyclops keyboard, and a Colby printer (rebranded Diconix Kodak). Second one shows a Walkmac SE, and...

Thanks @cheesestraws. I bit the bullet and ordered Hitachi ones. Will report back.

Yes 21V. My programmer only had 18V and it took a bit of trial-and-error to write. But it did eventually burn, and verified OK. But yeah, perhaps the programmer could read OK, but my Lisa ran into some SNR issues. Thanks for the reply

I'm not having too much luck posting my issue on an old thread in this forum, so I'll start a new one. I'm trying to convert my Mac XL back to a 2/10 model. To start with, I took the CPU board from the XL, swapped the two ROMs and the VSROM chip from my good 2/10, inserted this converted XL CPU...

mmm, it looks like I'm having a similar problem. I'm trying to convert my Mac XL back to a 2/10 model. To start with, I took the CPU board from the XL, swapped the two ROM and the VSROM chips from my good 2/10, inserted this converted XL CPU board in my 2/10, and confirmed that it worked OK. So...

Oh, and in case you'll have the same problem that I had when following LisaFAQ instructions, read on. When it says: "To display the 16 words at $186 type: 1186 20<return>" It is actually: type 1 to get into the ROM sub-menu, then type the actual address (186 in this example, or 27C in my...

True :) By the way, I botched the link to the LisaFAQ page where you'll find the solution to errors 70 and 71. It's here: https://lisafaq.sunder.net/lisafaq-hw-mem_error.html

@stepleton : Thanks again. I found the location of the faulty chip using the info stored in memory locations 27C and 27D. This is also described in the LisaFAQ site. I had some spare 64k chips from a similar repair on a Mac 128h, and a soldering job did the trick. I could have saved $125 ...

Oh I see, thanks for pointing this out. I'll be in the camp of those who appreciate the patience and dedication of the people who donate their time to make this forum possible, and who clearly feel the pain more than everyone else.

And about 68kmla vs Lisalist, I noticed no posting since February in this Lisa forum, before mine. Did the newer stuff get wiped out during the recent outages ?

Oh thanks! My programming skills are limited to FORTRAN (yes I know :eek:) and high level stuff like MATLAB. Assembly language always scared me... But you're right, there are several mentions of faulty parity chip location, so I'll look into it.

Thanks @stepleton I hope my Lizzy doesn't fail me again, but if it does, I will try the Z8 piggyback solution, although what I paid for the whole controller card was about the same price, and simpler (thanks vintagemicros.com) And yeah, I read the posts about the memory errors. Nothing...

Thanks @stepleton and @cheesestraws for your comments. Once again, I greatly benefited from your insight, and I could not have done this without your previous posts and these software tools. Looking forward to reading about these two Widgets. By the way, would you have any pointer for fixing...

I recently acquired a Lisa 2/10 from its original owner, on Craigslist (SF Bay Area). It came with an original Lisa 1 mouse (:p), and lots of software with manuals in mint condition. The cosmetic condition of the Lisa was impeccable, but it did not quite work. The screen was shaky, and you could...

For what it's worth, here is a recent post that I contributed on this issue. I do not offer an explanation, but simply an observation of different bahavior with respect to this problem with 800k FDDs