Image Map Image Map
Results 1 to 8 of 8

Thread: Xerox 820-II Disks

  1. #1

    Default Xerox 820-II Disks

    Well, I've received my Xerox 820-II (Thanks Erik!)

    Now, after searching the Internet, I have yet to find any Disk images for it, in the 5.25" drive format. all the ones I have found are for 8" drives...

    Does anyone out there have an 820-II with 5.25" drives? If so, would it be possible for you to make some Disk Images for me? I'd really appreciate it.

  2. #2

    Default

    http://www.vintage-computer.com/vcfo...ad.php?t=14602

    Read that thread. Sure sounds like doing the same thing to me.

  3. #3

    Default

    Hmm, I've tried just writing the 8" images to 5.25", no luck there. I'm going to try the Xerox 820 (Not 820-II) images I've found next.

  4. #4

    Default

    I haven't tried any of that myself. Did seem to work in one case. Note: says was using 1.2MB disks.
    I have a real 8" drive sitting here. I need to get around to working on getting those (dual drives) working.

  5. #5

    Default

    Can someone tell me about the cable that connects a Xerox 820-11 to a 5 1/4" drive? I understand that when connecting a disk drive to the 820 board pin 2 of J1 must be grounded for 5 1/4" drives. Pin 2 of J1 must be opened for 8" drives. That may be the problem...the disks you're making are ok, but you have not grounded pin 2.

    Bill

    UPDATE:
    I found the answer to my question. Using an SA 405 drive...and a 34-pin cable
    The cable for the 5 1/4" drive is (according to notes I have):
    1 n/c
    2 GND if 5 1/4"
    3 n/c
    4 index
    5 select 1
    6 select 2
    7 side select/select 3
    8 head load
    9 direction
    10 step
    11 write data
    12 write gate
    13 trk 0
    14 write prot
    15 read data
    16 low current
    17 ready
    18 free +12
    19 +5
    20-37 GND
    Last edited by billdeg; March 11th, 2009 at 05:51 PM.
    @ BillDeg:
    Web: vintagecomputer.net
    Twitter: @billdeg
    Youtube: @billdeg
    Unauthorized Bio

  6. #6

    Default

    Hmmm, Pin 2 of J1 on the floppy seems to be a ground, shouldn't be problems there. Not sure what to do. I'll keep looking I guess.

    Interesting information on the cable though Billdeg. Any idea how to do the opposite, connect an 8" drive to an 820? That might be one of my future (once I get some 8" drives) projects.

  7. #7

    Default

    yes, simply open pin 2. It works like a toggle.
    @ BillDeg:
    Web: vintagecomputer.net
    Twitter: @billdeg
    Youtube: @billdeg
    Unauthorized Bio

  8. #8

    Default

    I understand the pin 2 thing, I just don't know what the 8" drive cable looks like, except for the DB-37 on the one end.

    Well, I've received some very good help, but I now have a different issue; A Cap in my 820's PSU just Blew up (a good show though, 2 loud cracks and tons of smoke). It's repairable and nothing else looks like it's harmed. But testing will resume after I've repaired it.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •