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  1. #1

    Default Tandy 1000-WS

    Here you go. My other action win.

    I've attached some pretty good size pictures (if the forum doesn't crop them). The Tandy part numbers are on everything.

    Edit: Higher quality pics: http://imgur.com/gallery/yzvrp

    This appears to be in a TL style case, as witnessed by the floppy drives (2x). However, the board somewhat resembles a later SL/2 type board (but without the audio DAC jumpers in the front). Be happy if you all could compare this to the SL, SL/2, TL/2, TL/3, SL/E, etc. There is a lot on this board that is not populated. I'd love to figure out what it's missing (besides the obvious ISA slots, the DRAM sockets, and floppy connector).

    I've dumped the BIOS and the Welch Allyn and Tandy Boot ROM from the ISA card. The system boots into a Tandy terminal emulator, expecting I/O on the built in serial port. It boots into MDA mode, with a POST of 128K. There's apparently enough sockets to add 128K more, for 256K. If anyone can interleave the ODD and EVEN BIOS files for me to make one coherent 32K file, let me know.

    The two ports on the ISA card are for a serial printer and a credit card reader. I vaguely recall a light barcode pen reader as well, but I don't remember how it hooked up. Maybe it daisy chained with the printer or credit card reader.

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    Last edited by acadiel; July 15th, 2017 at 05:08 PM.

  2. #2

    Default

    Nice. I've never heard of this model. What's the story on it?

  3. #3
    Join Date
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    Atlanta, GA, USA
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    1,099

    Default

    Well it had a working parallel port. I suspect the printer connected to it while the bar code reader and CC reader connected to the ISA card. There is only one discrete UART on the card. But it has an MCU (HD63A03X) that also has a UART built into it.

    @pski, apparently it was a extreme cost reduced Tandy 1000 (SL/TL hybrid) used by Radio Shack stores as an intelligent terminal connected to the back-end store management server. It was used as a Point-of-Sale terminal.
    "Good engineers keep thick authoritative books on their shelf. Not for their own reference, but to throw at people who ask stupid questions; hoping a small fragment of knowledge will osmotically transfer with each cranial impact." - Me

  4. #4

    Default

    Quote Originally Posted by eeguru View Post
    Well it had a working parallel port. I suspect the printer connected to it while the bar code reader and CC reader connected to the ISA card. There is only one discrete UART on the card. But it has an MCU (HD63A03X) that also has a UART built into it.

    @pski, apparently it was a extreme cost reduced Tandy 1000 (SL/TL hybrid) used by Radio Shack stores as an intelligent terminal connected to the back-end store management server. It was used as a Point-of-Sale terminal.
    When I worked there, I seem to remember something was daisy chained to something else. The receipt printer likely was serial; for some reason, I remember a RJ11 to DE connector on it. (My memory is like 20 years old at this point.) The Welch Allyn was probably a pen barcode reader; I remember those. The magstripe definitely inserted itself into the serial stream somehow as well, as credit cards simply dumped the data into the terminal.

    The system is *very* close to this SL/E: http://www.vcfed.org/forum/showthrea...799#post389799

    I need to see under his drive bay and look at the missing chips. There's some of the audio circuitry (header) missing in mine compared to his, along with the DRAM sockets, the ISA sockets, the floppy header, and likely some other chips under the bay. The SL/E motherboard is (c) 1989 and mine's (c) 1988, so it's slightly newer.
    Last edited by acadiel; July 16th, 2017 at 06:43 PM.

  5. #5

    Default

    Compared my motherboard to the Tandy 1000 SL Technical manual. The motherboard appears to be missing the following.

    TL;DR: They left out three ISA connectors, all floppy drive circuitry, and lots of DRAM sockets/capacitors as well as the supporting capacitors/resistors for these. The PSU is also fan-less.

    I'm going to put 4 DRAMs in the empty sockets to bring the system up to 256K, and install a 1K EEPROM into the EEPROM socket to see if I can get the unit to save the CTRL-ALT-SHIFT-V video preference.

    Chips/Sockets missing (some sockets are there, but no chips of the below):
    *U10 - DIP18 - 64K x 4 DRAM 120ns
    *U11
    *U15
    *U16
    *U19
    *U20
    *U23
    *U24
    *U27
    *U28
    *U31
    *U32
    *U34
    *U35
    *U36
    *U37
    *U5 - DIP14 - 74LS00
    *U12 - DIP40 - 765A FLOPPY CONTROLLER
    *U17 - DIP8 - IC EEPROM 1K SERIAL
    *U18 - DIP24 - Floppy Disk Support Logic? (8041401)
    *U21 - DIP40 - 8087?

    Sockets and others:
    J2 - Floppy Disk 34 pin Connector
    J6 - ISA slot
    J7 - ISA slot
    J8 - ISA slot
    R6 - 8087 resistor
    C21 - 8087 capacitor
    R4 - Floppy Support logic resistor
    C7 - DRAM capacitor
    C8
    C16
    C17
    C20
    C23
    C25
    C26
    C30
    C33
    C41
    C52
    C49 - Floppy connector Capacitor
    C53
    C54
    C55
    C56
    C57
    C58
    C59
    C60
    C61
    C62
    C63
    C64
    C65
    RP3 - Floppy resistor pack

    1000ws-roms.zip
    Last edited by acadiel; July 17th, 2017 at 04:47 AM.

  6. #6

    Default

    That is really cool...thank you for sharing photos and information! I saw that on the auction listings and wondered just what it was. Now I know!

    I compared with my photos...different than the SL, but not a whole lot. You are welcome to poke around and compare for yourself...unfortunately I don't have an SL/2, so no photos of one... http://www.megley.com/photos/tandy

    Wesley

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