Jump to content

gilles

6502
  • Content count

    64
  • Joined

  • Last visited

About gilles

  • Birthday 08/19/1972

Contact Methods

  • Website URL
    http://www.alternative-system.com

Profile Information

  • Gender
    Male
  • Location
    France
  • Interests
    Lisa, NeXT, emulators...

Recent Profile Visitors

181 profile views
  1. gilles

    Apple 2c IIc video issue

    maybe a bad ground in the cable? It does not seem to be a big issue. the screen is a TV ? pal or NTSC IIc ?
  2. gilles

    Apple IIc label

    to me the most obvious difference in text is the small C of Apple IIc (smaller capital bold for Irish label and lowercase bold for US). Space between the 2 I is also different. It seems more a "Sans serif" early font than an arial (or maybe an original postscript helvetica)
  3. gilles

    Lisa 2/5 mouse button issue

    all mouse handling is done in the COP chip on the IO-board, but it might just fail because of a bad connector on the motherboard. if mouse position is good but button fails you can have one port of the cop bad but most probably it's just a contact problem, check cop support (it's not far from battery pack and subject to damage here)
  4. seems real strange if adb keyboard works and not mouse. maybe you could try without SCSI and boot with a clean system on floppy.
  5. gilles

    Lisa Keyboard Pads

    the pads from the ebay listing do not have the rigid top discs, so they must be glued to original discs (that can remain in place in the keyboard). It is the same method I used weeks ago.
  6. maybe we can find something on the bios listing. The sram for the mmu may be faulty (on the cpucard).
  7. gilles

    Lisa display problem

    I add exactly the same symptoms with bad capacitors in the power supply last year. They were still perfect visually (I still have them somewhere)
  8. it seems there is a 800k floppy (but maybe faulty) on ebay. I also have one (from an incomplete MacII I think) but untested and shipping will be far too expensive. Maybe a floppy emu would be a better option if you want to test many OS? you will also need the correct 2732 (io)rom (keep or dump your 800k rom first...)
  9. the material should not be conductive on surface because some pads have a very thin track in the middle that must not be short (otherwise there are unexpected results like random keypress, I had this problem with my 1st version of aluminium+tape pads that were still conductive on the edge). While searching I found some good candidates in the kitchen for the capacitive pads. the foam is a windows insulation product. I kept the original rigid discs of the top and just glued my new pads with a thin layer of glue. It's better to test each pad before gluing (3 of my pads were not working initially, probably because the capacitive layer had some folding marks)
  10. fixing the keyboard takes time but it does not always take much money. But you have to find the good material My rebuild is here (in french but with photos): http://www.silicium.org/forum/viewtopic.php?f=8&t=25619&hilit=lisa&start=60 for just a quick test you can directly type on the keyboard PCB... it works (and it's a good method to learn blind typing)
  11. cpu rom 3a needs video rom of the screen kit to display properly. A lisa can start with a rom mismatch but displays dots at (not really) random places instead of images.
  12. There was a capacitor list somewhere (values and digikey reference) but I cannot find it anymore. You can find some parts on lisalist I think https://groups.google.com/forum/#!searchin/lisalist/capacitor$20list$20lisa|sort:date/lisalist/mwROKHVSnL0/qoW4zNRk6jgJ I'm not 100% sure that a 800k iorom works with 400k drive but this version of iorom is needed for Macworks plus. Your screen kit transformer is not plugged in, that may explain why your image is small (as SuperSVGA said). You will have to adjust potentiometers after it is plugged If you want to use your lisa as a slow macintosh plus, the best option is to install a 800kb floppy, if you want to play with lisa OS you will need to change CPU rom and video prom
  13. gilles

    Gemdos + GEM for lisa

    it appears that the gemdos part is unfinished, but I posted a new image that should work for 1.5 and 2Mb ramsize. The problem with more than 1mb is that video base address is not where the coders from DRI hardcoded it. I added a builtin command "MAGIC" in command.prg to force the normal value of 1Mb lisa. gemdos.dc
  14. with this io rom I think you should have a 800k floppy. you can try to put a 800k mechanism (but you need to check first the floppy cable, it may have been modified for a 800kb drive, also check the lisalight board as the modification can be here also). or you can put a new original 400Kb rom for the 2/5 (on a 2732 eprom). with a 3A cpu rom (part of the screen modification kit) you will only run macworks XL or plus.
  15. your iorom seems to have a label on it, maybe it was modified for a 800Kb floppy... but you have a 400k drive it seems. what are the rom numbers when your lisa is booting?
×