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  • retrobecanes's Avatar
    Today, 07:39 AM
    Hello group, I am looking for disk images of Franklin DOS 2 (FDOS2). The one that I find on Asimov doesn't seem to work. Any other disk images...
    0 replies | 25 view(s)
  • iz8dwf's Avatar
    Today, 02:48 AM
    If RAM and ROMs are ok (but I doubt they can be safely tested from a daughterboard, having made my own daughterboard too), then this looks like a...
    6 replies | 63 view(s)
  • iz8dwf's Avatar
    August 20th, 2019, 11:15 PM
    I would first of all check the enable signal(s) to the eprom and any possible data bus transceiver that might be in its data path. However yes, I've...
    15 replies | 227 view(s)
  • iz8dwf's Avatar
    August 11th, 2019, 11:47 PM
    I think you mean 2049 ($0801). What command are you using to load the HILOADER? Frank
    4 replies | 134 view(s)
  • iz8dwf's Avatar
    August 9th, 2019, 09:48 AM
    iz8dwf replied to a thread cbm 8032 rusty and dead in Commodore
    https://github.com/sjgray/cbm-edit-rom and more generally here: http://www.6502.org/users/sjgray/projects/editrom/
    40 replies | 2340 view(s)
  • iz8dwf's Avatar
    August 8th, 2019, 11:00 PM
    iz8dwf replied to a thread cbm 8032 rusty and dead in Commodore
    That's a well known adapter, the design is around 30 years old or more now :) However, the older PETs (no-CRTC, 9 inch monitor) have different sync...
    40 replies | 2340 view(s)
  • iz8dwf's Avatar
    August 7th, 2019, 11:20 PM
    iz8dwf replied to a thread cbm 8032 rusty and dead in Commodore
    to me, Hsync doesn't seem to be correct, maybe also Vsync. How did you adapt the peculiar scan rates of a CRTC PET to that monitor? I use an old MDA...
    40 replies | 2340 view(s)
  • iz8dwf's Avatar
    August 2nd, 2019, 12:05 AM
    some, not all. http://www.zimmers.net/anonftp/pub/cbm/schematics/datassette/cas-10r.gif
    7 replies | 448 view(s)
  • iz8dwf's Avatar
    August 1st, 2019, 09:48 AM
    afair it's not a pass through connector, it's a test port to access various signals. My memory could fail after more than 30 years though. Frank
    7 replies | 448 view(s)
  • iz8dwf's Avatar
    July 30th, 2019, 11:29 PM
    iz8dwf replied to a thread Another dead SuperPET! in Commodore
    Voltages are too low and it's strange that all are too low at once. Did you check your voltmeter with a known good reference or another good board...
    14 replies | 441 view(s)
  • iz8dwf's Avatar
    July 29th, 2019, 11:34 PM
    Exactly, since at least 20 years, all TVs (even the old CRT ones) have multistandard inputs and can display NTSC signals just fine. Even my old...
    11 replies | 648 view(s)
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