Image Map Image Map
Page 6 of 7 FirstFirst ... 234567 LastLast
Results 51 to 60 of 66

Thread: TRS-80 diagnostic/ICE card

  1. #51
    Join Date
    Sep 2016
    Location
    Melbourne, Australia
    Posts
    542

    Default

    I had a new version of the boards run which corrects the silk screen issue. I have them in hand ready to ship, anyone that is still wants one please PM me.

    20180706_104057.jpg

  2. #52
    Join Date
    Apr 2015
    Location
    Morisset, NSW Australia
    Posts
    217

    Default

    Quote Originally Posted by David_M View Post
    I had a new version of the boards run which corrects the silk screen issue. I have them in hand ready to ship, anyone that is still wants one please PM me.

    20180706_104057.jpg
    Are you doing a board for the CPU plug? Or is that left as an exercise for the reader?

    PJH
    Last edited by pjhacnau; July 5th, 2018 at 07:24 PM.

  3. #53
    Join Date
    Sep 2016
    Location
    Melbourne, Australia
    Posts
    542

    Default

    Quote Originally Posted by pjhacnau View Post
    Are you doing a board for the CPU plug? Or is that left as an exercise for the reader?
    PJH
    All you need is a ribbon cable, standard 40 pin header one end and a 40 pin dip header on the other end.
    https://www.digikey.com/product-deta...P40S-ND/924326

  4. #54
    Join Date
    Apr 2015
    Location
    Morisset, NSW Australia
    Posts
    217

    Default

    Quote Originally Posted by David_M View Post
    All you need is a ribbon cable, standard 40 pin header one end and a 40 pin dip header on the other end.
    https://www.digikey.com/product-deta...P40S-ND/924326
    Well that does make life easy. Thanks for the ref.

    PJH

  5. #55
    Join Date
    Sep 2016
    Location
    Melbourne, Australia
    Posts
    542

    Default

    Quote Originally Posted by pjhacnau View Post
    Well that does make life easy. Thanks for the ref.

    PJH
    The ordered dip headers when I made the first hard wired prototype but they haven't arrived yet. I made up the ugly pcb arrangement you saw in the early photo's because I didnt want to wait

  6. #56
    Join Date
    Sep 2016
    Location
    Melbourne, Australia
    Posts
    542

    Default

    For those who are interested or have already ordered a board from me. Here is a link to the latest version of the Arduino code.

    https://drive.google.com/open?id=1y0...Aoq0-NNrJEy_XE

    I've added some new features and quite a few bug fixes to the original code. I believe the refresh timing bug in the original code has been fixed, however my model one has a fault which prevents me properly testing it.
    It seems addresses in the range ?000h-?7FFh refresh fine but ?800h-?FFFh addresses lose coherency after a few seconds. The problem also occurs when not using the exerciser and the cpu is active as normal. I'm pretty certain the problem is caused by the 48k memory mod that is fitted. So if some of you guys that ordered aboard could test the refresh ability of the exerciser I'd greatly appreciate it.

  7. #57

    Default

    Having just acquired a Model I, I'm very intrigued by this and trying to catch up.

    Based on what I'm reading, this is an Arduino shield that you connect to a Model I and it'll display diagnostic information on the Model I's display?

    -Kevin

  8. #58
    Join Date
    Sep 2016
    Location
    Melbourne, Australia
    Posts
    542

    Default

    Quote Originally Posted by troj View Post
    Having just acquired a Model I, I'm very intrigued by this and trying to catch up.

    Based on what I'm reading, this is an Arduino shield that you connect to a Model I and it'll display diagnostic information on the Model I's display?

    -Kevin
    Yes it is a shield for a Mega2560 that connects to a model 1 expansion port or any Z80 based computer via the CPU socket.
    It allows you to read/write to memory and IO ports, you can fill blocks of memory with a specific value, checksum a block of memory, dump the contents of memory and also test a block of memory.
    There are some tests specific to a TRS-80, checksum and identify the ROMS, a keyboard test, a display memory test and a display memory test for machines fitted with a lower case mod.

    Results are displayed and commands are issued via the Arduino's serial port on the host computer.

  9. #59

    Default

    Definitely interested in a board please PM sent.

  10. #60

    Default

    I'm definitely interested in one, as well!

    -Kevin

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
  •