LisaList2

Advanced search  

News:

2022.06.03 added links to LisaList1 and LisaFAQ to the General Category

Pages: [1] 2 3 ... 10
 1 
 on: December 03, 2022, 02:43:56 pm 
Started by blusnowkitty - Last post by fri0701
With help from Tim Colegrove and his Lisa 1, we were able to finally dump my Twiggy disk of Art Department. I suspect the included files are the same as on the 3.5" Art Department disk images that showed up since my last post, but for the sake of completeness, I've added the image to my archive.org entry here if anyone is curious to try it out: https://archive.org/details/apple-lisa-art-department

 2 
 on: November 25, 2022, 07:53:41 am 
Started by blusnowkitty - Last post by rayarachelian
you still have that program? I have a Mac XL without serial number (the label isn't readable anymore) which I want to get back to a Lisa 2/10.

Regards from Germany,
Julian

see: https://github.com/rayarachelian/lisaem/blob/livedev/src/tools/src/mkvsrom.c


 3 
 on: November 25, 2022, 05:21:10 am 
Started by blusnowkitty - Last post by iJol
FWIW, the TopMax family can now write to 28L22's, which is a substitute for the 6309. I got a bunch on utsource not long ago. I've got a Python script somewhere that can write a 'master' rom with all 0's for serial and Applenet, and probably wouldn't take much to write whatever serial/applenet you want, if it's helpful to you.

Hey,

you still have that program? I have a Mac XL without serial number (the label isn't readable anymore) which I want to get back to a Lisa 2/10.

Regards from Germany,
Julian

 4 
 on: November 17, 2022, 07:35:31 pm 
Started by turbodiesel75 - Last post by fri0701
Sorry for the cross-forum linking - but a couple years ago, I recapped a number of Lisa 1.2A PSUs. I posted a list of caps that I ordered on 68kmla that I imagine are still mostly available: https://68kmla.org/bb/index.php?threads/lisa-ac-interference-coupling.35554/#post-383552

Please note, however, that I realized that I ordered some capacitors with less-than-ideal specs (hence the whole post about AC interference coupling). I swapped out the six 16V 2200uf capacitors with a different type, and all worked out great. There are notes on that, including what I ordered instead, further down in the linked thread.

 5 
 on: November 17, 2022, 02:36:16 am 
Started by turbodiesel75 - Last post by sigma7
Quote
There are some parts lists here somewhere.... searching....
I haven't found anything with relatively recent 1.2A PSU cap substitutes... anyone have something at hand?

IIRC, the urgency is to replace:
  • the "across the line / line to ground" X/Y safety rated capacitors C1, C2, C3, C4 (especially if they are in a translucent package as they typically crack and then explode making a mess).
  • the primary switcher capacitors C12, C13 (as these are under the most stress and are the primary point of failure) .. use the best quality available with high hour and ripple current ratings and derate by using a higher voltage than the original (as long as it fits, which shouldn't be a problem as a modern capacitor is much smaller than a 1980s cap of the same rating)
In addition, one may choose to replace (or test and replace if not good):
  • the output filter capacitors C9, C10, C14, C15, C18, C19, C20, C21 (and perhaps C24, C27, C28)
  • any other aluminum electrolytics
Schematic is here: https://lisalist2.com/index.php/topic,292.0.html

The prolific Tom Stepleton started a census for the capacitors here: https://github.com/stepleton-xx/lisacapcensus/blob/master/620-0120_Power_Supply.txt

While you've got it apart, my preference is to add a small quiet fan to the top-inside of the PSU case as they run a bit warm otherwise.

I hope others will add further advice / comments / corrections ...

 6 
 on: November 16, 2022, 08:55:55 am 
Started by fri0701 - Last post by AlexTheCat123
Wow! This is really exciting!

 7 
 on: November 15, 2022, 05:55:04 pm 
Started by fri0701 - Last post by rayarachelian
Hope I live long enough to see it

 8 
 on: November 15, 2022, 05:54:22 pm 
Started by fri0701 - Last post by stepleton
Fantastic news! Congrats Al and everyone at CHM + elsewhere who are making this happen.

 9 
 on: November 15, 2022, 05:37:13 pm 
Started by fri0701 - Last post by fri0701
https://computerhistory.org/blog/the-art-of-code-at-chm/

"Closely following will be CHM’s public release of the source code for the Apple Lisa computer, a remarkably influential project by Apple that did so much to bring the graphical user interface and “What You See is What You Get” approaches into personal computing. It is still our primary way of interacting with digital technology forty years later."

Exciting stuff!

 10 
 on: November 11, 2022, 03:52:46 pm 
Started by turbodiesel75 - Last post by sigma7
Anyone here willing to do a refurb/recap on my 1.2A power supply for Lisa 2/5 (for a fee, obvi)?
I'm in western Canada so not a very economical option.

Since recapping is pretty common now for a variety of old electronic bits, presumably there are local folk with experience (other than the Lisa) that would just need the few details about the Lisa PSU capacitor substitutes.

There are some parts lists here somewhere.... searching....

Pages: [1] 2 3 ... 10