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Thread: Tandy 1000 Adapters - expressions of interest?

  1. #1

    Question Tandy 1000 Adapters - expressions of interest?

    G'day Guy's, Im in the process of making some Tandy 1000 Adapters mainly for myself (for my 1000 EX) but I'm curious to know if there is much interest in these from others?

    I've designed PCB's the following parts:

    1. Tandy 1000 EX / HX PLUS to ISA Expansion adapter (requires the DMA/RAM expansion installed) = $15 USD
    2. Tandy 1000 EX / HX external Floppy Drive replacement cable = $19 USD
    3. Tandy 1000 Edge Connector to DB25 Parallel port Adapter = $TBD


    Shipping to the USA would be $5 USD per item or $25 USD for multiple items together ($5 = a is a bit of a cheat using a "large letter" hence the cost disparity)


    I've made 5 of Item #2 already and just need to test them - I have about 2 or 3 spares left as at least 1 is already spoken for.

    I have 10 PCB's for Item #1 enroute from china atm and will have approximately 6 left over as I already know a couple of folks that want one.

    Item #3 only exists in my head atm but is dead simple to design and build - I'll make a small run if folks are interested.


    Just to be clear, this topic ISNT a "for sale" topic, I'm just trying to gauge interest from the Tandy 1000 owners here. If I get enough interest I'll finish / build the items and then start a for sale topic in the marketplace. I wont take anyones money until I've got finished and tested adapters in my hot little hands.
    My Retro Collection:
    CBM: C64, Amiga 500 x2, 600 & 1200
    Mac's: SE, LC630 & Beige G3
    PC's: K6-III+ 500 System + Roland MT-32 & Tandy 1000 EX 640kb, 3.5" FDD, CF-IDE 4GB HDD
    Visit my Tindie store for Tandy 1000 Adapters for EX, HX, SX, SL, TX & TL etc

  2. #2

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    Pic's:

    Item #1

    This is actually my v7 design which while it works, has some minor issues. v8 is more compact and cheaper to make as the PCB is shorter (there's no need for the mounting holes on either side). v8 also has the right angle header mounted on the front side of the board.


    v8 Design:


    Item #2
    Replacement external FDD Cable:


    Item #3
    Haven't laid out the PCB yet, will add a PCB design Pic a bit later this weekend.
    Last edited by dJOS; July 21st, 2017 at 02:11 AM.
    My Retro Collection:
    CBM: C64, Amiga 500 x2, 600 & 1200
    Mac's: SE, LC630 & Beige G3
    PC's: K6-III+ 500 System + Roland MT-32 & Tandy 1000 EX 640kb, 3.5" FDD, CF-IDE 4GB HDD
    Visit my Tindie store for Tandy 1000 Adapters for EX, HX, SX, SL, TX & TL etc

  3. #3

    Default

    How difficult would it be to make an adapter to allow three ISA cards? HX was my first MSDOS computer and would love to get one, but the lack of cards makes it a no starter for me. I'd love to have a serial and or ethernet ISA card in one.

  4. #4
    Join Date
    Mar 2016
    Location
    Georgia, USA
    Posts
    474

    Default

    I'd be interested in several of the card-edge to DB25 printer adapters.

    Also at least one ISA expansion adapter for my EX.

  5. #5

    Default

    Quote Originally Posted by Tibs View Post
    How difficult would it be to make an adapter to allow three ISA cards? HX was my first MSDOS computer and would love to get one, but the lack of cards makes it a no starter for me. I'd love to have a serial and or ethernet ISA card in one.
    Quite easy actually, it would need to go into the lower expansion connector due the height needed - I'd have to check to make sure tho. The memory expansion is mandatory tho as most cards won't work without the DMA controller.
    My Retro Collection:
    CBM: C64, Amiga 500 x2, 600 & 1200
    Mac's: SE, LC630 & Beige G3
    PC's: K6-III+ 500 System + Roland MT-32 & Tandy 1000 EX 640kb, 3.5" FDD, CF-IDE 4GB HDD
    Visit my Tindie store for Tandy 1000 Adapters for EX, HX, SX, SL, TX & TL etc

  6. #6

    Default

    Quote Originally Posted by keenerb View Post
    I'd be interested in several of the card-edge to DB25 printer adapters.

    Also at least one ISA expansion adapter for my EX.
    Cool, I'll finish the design in the next few days and order the parts for the printer adapter.
    My Retro Collection:
    CBM: C64, Amiga 500 x2, 600 & 1200
    Mac's: SE, LC630 & Beige G3
    PC's: K6-III+ 500 System + Roland MT-32 & Tandy 1000 EX 640kb, 3.5" FDD, CF-IDE 4GB HDD
    Visit my Tindie store for Tandy 1000 Adapters for EX, HX, SX, SL, TX & TL etc

  7. #7

    Default

    Is there an ISA memory card that would solve that problem? Finding the plus ram card isn't quite that bad though.

  8. #8

    Default

    Quote Originally Posted by Tibs View Post
    Is there an ISA memory card that would solve that problem? Finding the plus ram card isn't quite that bad though.
    My understanding is the PLUS-Ram card has a custom DMA controller integrated into the memory controller chip - without it only simple cards like a serial card / modem will work. Anything else like an ethernet card or IDE controller wont function without it.

    Without the PLUS-Ram card there is no DMA function in the system - once installed it makes a noticeable difference to the speed of the machine, even the floppy drive speeds improve.
    My Retro Collection:
    CBM: C64, Amiga 500 x2, 600 & 1200
    Mac's: SE, LC630 & Beige G3
    PC's: K6-III+ 500 System + Roland MT-32 & Tandy 1000 EX 640kb, 3.5" FDD, CF-IDE 4GB HDD
    Visit my Tindie store for Tandy 1000 Adapters for EX, HX, SX, SL, TX & TL etc

  9. #9

    Default

    Then probably just need one with two slots.

  10. #10
    Join Date
    Mar 2016
    Location
    Georgia, USA
    Posts
    474

    Default

    Quote Originally Posted by Tibs View Post
    Is there an ISA memory card that would solve that problem? Finding the plus ram card isn't quite that bad though.
    Something like James Pearce' 1mb memory card would probably work in the riser. Doesn't offer DMA capabilities but if all you're looking for is memory expansion past 128k it'd be sufficient.

    An EX/HX with 1MB expansion + non-DMA xt-ide would actually be pretty usable.

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