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fri0701

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Everything posted by fri0701

  1. If you haven't used Service Mode to check your RAM boards yet, I'd recommend it. I'm unsure if this view would give any additional info if the power-up self tests pass, but it's worth a shot in my opinion. https://lisafaq.sunder.net/lisafaq-hw-mem_error.html
  2. Hi everyone, Well, this stinks. I decided to try out my Dove MacSnap 548 card in my (previously) working 512k, which upgrades the memory to 2MB. After snapping the card on the logic board, I turned on the computer - the boot beep was very distorted and lasted a very long time, maybe around 10 seconds. After the beep ended, the screen turned on, but it just showed a single horizontal line. Now my issue is that when I removed the expansion card, the same issue remains! Can anyone offer any advice? I hope I didn’t just cause myself a huge issue... (my theory i
  3. I found those online while looking for the schematic, but that one's for the first revision: 820-0401-B.
  4. Does anyone know where I can find schematics for the second revision Classic II motherboard? Part number is 820-0326-B. Thanks!
  5. I should also mention that the soft power key from the keyboard does work to turn on the computer.
  6. Hi everyone, I decided it's time to finally fix my broken IIcx! (but I've run into some roadblocks) Originally, the computer wouldn't turn on at all - it would click if I held down the power button, but that was about it. I replaced all surface-mount and axial capacitors on the motherboard, and now the computer will turn on, but it plays the dreaded Chimes of Death. Despite this, the hard drive sounds like it's seeking, but the screen is blank. I'm using a known good video card, so I think I can rule that out as an issue. The chimes play even when no video card or RAM is installed. T
  7. Hi everyone, I just backed up an Apple III-formated ProFile drive (10MB) to my modern Mac using ADTPro. Does anyone know of a utility program that exists that can read the .po disk image and save each file on the disk as a separate file on my modern machine? I thought of using Ciderpress (which I've had success with in the past for Apple II disks), but it doesn't seem to play nice with this image. Thanks!
  8. From a 2013 thread about one of the other two Twiggy Macs: @OldMacGuy - Sounds like a good first step will be to find someone (ideally) local with a Lisa 1, who should be able to read and back up your disk over a serial connection to a modern computer. I'd recommend pursuing a backup now before continuing to test your drive with that disk, so you don't lose any data or corrupt the disk during your testing! As for the drive itself, there's been some good discussion about Twiggy servicing over at LisaList2 lately. Perhaps you'll find that useful at a starting point:
  9. That is surprising! Your keyboard has the same groove in the same place as the first Twiggy Mac's keyboard.
  10. @OldMacGuy Your keyboard seems to have the same pull-out drawer as one of the other surviving Twiggy Macs. Is there anything inside? Thanks for the additional pictures! I'm grateful you're taking the time to thoroughly photograph and document this machine.
  11. Or the Computer History Museum! I bet they'd love to display one of these.
  12. Amazing find! I hope you post more details about it soon, including some more photos!
  13. Hi Sunder, Here's a link to my code: https://github.com/tfrikker/lisa_utils Hopefully you find it useful for debugging purposes! Feel free to PM/post here if you need my help with anything, or if you test it on any of your disks! I'm curious to hear how it goes.
  14. Here's a link to the table of startup error codes: https://lisafaq.sunder.net/single.html#lisafaq-hw-rom_error_codes Looks like a Bus error (not entirely sure what that entails, but maybe a poke around the Lisa boot ROM source would get you somewhere?)
  15. Hi Sunder, I read over the BLU image format (http://sigmasevensystems.com/blumanual.html) and the DC42 format (https://wiki.68kmla.org/DiskCopy_4.2_format_specification), and I decided I'd try to write my own version of blu-to-dc42 from scratch. I got a version working that produces bootable ProFile images from my raw BLU dumps! It only supports 5MB ProFiles at the moment. Once I clean up my code a bit, I'd be happy to send you a link if you're interested in taking a look.
  16. I ended up using ZTerm, and it looks like it worked! I now have 3 Lisa ProFile disk images on my modern computer. I ran all 3 of these through the "blu-to-dc42" utility and I now have 3 .dc42 images. None of these boot in LisaEm, however. My plan was then to set one of my dumped ProFile images on a virtual dual parallel port card and then boot from a fresh Lisa Office System install on the internal parallel port. However, when I boot from a LOS 3.1 ProFile image on the parallel port, no other ProFiles connected to dual parallel port cards show up. Do I need the ROM for that card to
  17. Thanks, Sunder! This'll be very helpful. Is there a modern Mac utility/program for grabbing bytes from serial that you'd recommend? I have a DB15-DB9-USB cable setup I use with my Apple III for ADTPro that I'm hoping will also work for the BLU transfer.
  18. Reading more about this, I'm probably asking the impossible, since I doubt ADTPro reads the tag bytes correctly off the drive. Unfortunately, I don't have much knowledge of BLU... I might have to dig into the documentation and see what other options exist.
  19. Hi all, I used ADTPro on my Apple III to transfer a complete image of a Lisa ProFile drive to my modern Mac. I'd like to use this drive image as a boot device in LisaEm, but the program doesn't seem to recognize it as a valid image. Has anyone successfully done what I'm trying to do here, or does anyone have any tips? Thanks!
  20. Do your PSU output voltages look to be within spec?
  21. You're braver than I am - I'd be too nervous to poke around the high voltages in the CRT cavity when the system is running. I don't have a video board handy right now, but the large square plastic connector near the video board card edge has given me a lot of trouble in the past in terms of getting it seated correctly.
  22. Have the original capacitors on the video board been replaced? I had the horizontal line issue on my 2/5 until I bit the bullet and replaced all electrolytics on the video board. Even if it's not the entire problem, it's a good thing to do preventatively to keep things working reliably. Although, the 0 volts on the +300V and -100V lines does seem suspicious... Just to be thorough, I'd also check that the various plastic connectors that connect into the video board are all making contact. Sometimes the plastic on those can get a little bent out of shape from the heat, and the wires
  23. There's some COPS-relevant documentation in the Lisa Hardware Reference Manual, sections 6.6.2 - 6.6.3: http://www.bitsavers.org/pdf/apple/lisa/hardware/Lisa_Hardware_Manual_Sep82.pdf
  24. You may find it useful to look at the boot ROM source on page 70: https://www.applefritter.com/content/lisa-boot-rom-listing
  25. Some of us have had the same issue after recapping and were discussing it on another thread - check this post out:
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