AtariBits
  • Home
  • Systems
    • 576NUC+ >
      • NUCplus4
    • 1088XEL >
      • XEL-CF Drive
      • XEL-CF3 Rapidus Variant
      • Accessories
      • XEL Archives
    • 1088XLD >
      • RGB2VGA-XLD
      • ARROW2JOY-XLD
    • CV-NUC+
  • TransKey
    • TK-II >
      • TK-II Manual
      • Installation
      • Device Compatibility
      • TK-II Archives
    • TK-II-STEREO
    • TK-II Control
  • XEP80-II
  • JOY2PIC
  • MOUSE
  • MIDI
    • MIDI 3D Printed Cases
  • UGV
    • Old UGV Archive
  • SDrive
  • RAM
  • Blog

TransKey TK-II-PBJ Incorrect Firmware Information

2/26/2021

 
Picture
Well what can I say other than I screwed up when I originally specified that the TK-II V2.4 firmware could work in the TK-II-PBJ board.
Picture
PictureClick on Image to go to TK-II page
The reality is that this board can only use the newest V2.5J firmware due to the lack of connection to 4 of the 6 key scan counter bits on the Pokey chip. For a better idea as to why these bits are not connected on this particular TK-II board version please check out the ARROW2JOY-XLD page for the details.



All other TK-II boards besides this one and the ARROW2JOY-XLD can use either the V2.4 or V2.5J firmware, depending upon what features you want to have. See the Manual for more info on those differences.

Edit: I just wanted to add that the PokeyMax FPGA based replacement product might not be 100% compatible with the V2.5J firmware. So until that issue is completely resolved, it would be better to stick to an original Pokey when only V2.5J firmware is a possibility. Despite what you may see elsewhere (eBay), NOS Pokey chips can still be purchased for $20 from BEST Electronics.

- Michael

Comments are closed.

    Author

    My name is Michael St. Pierre and in the early 90's I decided to create my very first Atari 8-Bit upgrade. It was called TransKey.
    ---Then soon after Atari folded and I left the scene ---
    25 years later I came back with a mission to improve upon what I had started so long ago.

    Archives

    May 2025
    March 2025
    January 2025
    December 2024
    September 2024
    August 2024
    July 2024
    May 2024
    April 2024
    February 2024
    January 2024
    December 2023
    November 2023
    August 2023
    June 2023
    May 2023
    March 2023
    January 2023
    December 2022
    August 2022
    May 2022
    April 2022
    December 2021
    October 2021
    July 2021
    June 2021
    May 2021
    April 2021
    March 2021
    February 2021
    January 2021

    Categories

    All
    576NUC+
    AtariBits News
    C64
    ColecoVision
    Industrial Applications
    Intro
    MIDI
    Monster 600XL
    Multi-Carts
    Multi-SLOT 1200XL
    NUCplus4 Assembly
    Transkey
    XEP80-II

    RSS Feed

Powered by Create your own unique website with customizable templates.