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Thread: Hi res pictures of SL and SL/2 motherboards

  1. #1

    Default Hi res pictures of SL and SL/2 motherboards

    Looking for hires pictures of the SL and SL/2 motherboards (to where I can see the whole motherboard, read the part numbers and dates, etc).

    If you happen to have one of these, please reply to this thread with it. Example picture attached for what I'm looking for (type of pic only; this board seems to degrade image quality.)

    Thanks!

    motherboard.jpg

  2. #2

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    Some photos of the 1000SL/E's motherboard here (it's virtually identical to the 1000SL/2):

    http://www.vcfed.org/forum/showthrea...799#post389799

  3. #3
    Join Date
    Mar 2016
    Location
    Georgia, USA
    Posts
    451

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    Quote Originally Posted by acadiel View Post
    Looking for hires pictures of the SL and SL/2 motherboards (to where I can see the whole motherboard, read the part numbers and dates, etc).

    If you happen to have one of these, please reply to this thread with it. Example picture attached for what I'm looking for (type of pic only; this board seems to degrade image quality.)

    Thanks!

    motherboard.jpg
    Try this.

    https://i.imgur.com/pWpEUTX.jpg

    https://i.imgur.com/hYDkSza.jpg

    Those are all SL motherboards, I believe. I don't have an SL/2 yet.

  4. #4

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    Quote Originally Posted by keenerb View Post
    Try this.

    https://i.imgur.com/pWpEUTX.jpg

    https://i.imgur.com/hYDkSza.jpg

    Those are all SL motherboards, I believe. I don't have an SL/2 yet.
    Yep, this helps! Thank you very much!

    From the date code, my 1000-WS board appears to be a little older than these. There's an IC amp and speaker connector on my board, whereas you have an empty spot where my amp is and a header for the sound/volume. There's also an interesting female connector right below the floppy connector - what's that for? You also have the parallel edge card connector, and mine has a DB25.

    My high-res pic is here. https://imgur.com/gallery/yzvrp

    I'm still of the belief that mine actually has a Tandy DAC and Tandy Sound. I just gotta get my conventional memory up a bit to test King's Quest and need to figure out if the sound works there. I can probably find a MOD playing program that runs in DOS and uses the Tandy DAC to see if the digitized sound works.

    Can someone on here dump their 8 pin serial settings EEPROM on their SL so I can get some sane EEPROM settings to burn to mine? The WS-1000 didn't have one by default; I had to put one so that I could get the MDA/CGA setting (CTRL-ALT-SHIFT-V) to stick.

    Another thing I noticed with your side by sides... you have one board with the U13A and U13B populated, and one without. I wonder what this PAL and logic chip's purpose is. The U13 also has a socket, but I don't even see it in the SL's BOM chip list. The U13A and B are there, though.

    The 1000WS I'm comparing the pics to was severely cost reduced. It has missing in it:

    * Support capacitors for the missing chips and other missing small components to support the below
    * Sockets for RAM >256K are missing
    * Socket for 8087 is missing
    * 3 ISA slots missing
    * FDC connector is missing
    * FDC chip (Zilog, Intel, etc) (Floppy Circuitry)
    * SCQ38068PX05 Floppy Disk Support Logic Chip (Motorola) (Floppy Circuitry)
    * 74LS00 (Floppy circuitry)
    Last edited by acadiel; January 8th, 2018 at 06:32 PM.

  5. #5
    Join Date
    Mar 2016
    Location
    Georgia, USA
    Posts
    451

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    Quote Originally Posted by acadiel View Post
    Yep, this helps! Thank you very much!

    From the date code, my 1000-WS board appears to be a little older than these. There's an IC amp and speaker connector on my board, whereas you have an empty spot where my amp is and a header for the sound/volume. There's also an interesting female connector right below the floppy connector - what's that for? You also have the parallel edge card connector, and mine has a DB25.

    My high-res pic is here. https://imgur.com/gallery/yzvrp

    I'm still of the belief that mine actually has a Tandy DAC and Tandy Sound. I just gotta get my conventional memory up a bit to test King's Quest and need to figure out if the sound works there. I can probably find a MOD playing program that runs in DOS and uses the Tandy DAC to see if the digitized sound works.

    Can someone on here dump their 8 pin serial settings EEPROM on their SL so I can get some sane EEPROM settings to burn to mine? The WS-1000 didn't have one by default; I had to put one so that I could get the MDA/CGA setting (CTRL-ALT-SHIFT-V) to stick.

    Another thing I noticed with your side by sides... you have one board with the U13A and U13B populated, and one without. I wonder what this PAL and logic chip's purpose is. The U13 also has a socket, but I don't even see it in the SL's BOM chip list. The U13A and B are there, though.

    The 1000WS I'm comparing the pics to was severely cost reduced. It has missing in it:

    * Support capacitors for the missing chips and other missing small components to support the below
    * Sockets for RAM >256K are missing
    * Socket for 8087 is missing
    * 3 ISA slots missing
    * FDC connector is missing
    * FDC chip (Zilog, Intel, etc) (Floppy Circuitry)
    * SCQ38068PX05 Floppy Disk Support Logic Chip (Motorola) (Floppy Circuitry)
    * 74LS00 (Floppy circuitry)
    I may be able to dump any of the chips you need. The female connector near the floppy header is for the game controller expansion board.

    I didn't notice the U13B pal; the ROM chips appear to be different types, maybe that has something to do with it.

    You do appear to have the Tandy DAC on the motherboard; the NCR 0381034 chip is the PSSJ chip. Whether it's connected and receiving data is another question.

    On the PSSJ according to the sl technical documentation, pins 57 and 58 are audio out, which are near the C207 and 09 markings on your board, directly adjacent to a surface-mount capacitor. Are those pins connected to anything? They'll be fourth and fifth from the edge of the IC near the 09 marking, I think.
    Last edited by keenerb; January 9th, 2018 at 05:14 AM.

  6. #6

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    Quote Originally Posted by keenerb View Post
    I may be able to dump any of the chips you need. The female connector near the floppy header is for the game controller expansion board.

    I didn't notice the U13B pal; the ROM chips appear to be different types, maybe that has something to do with it.

    You do appear to have the Tandy DAC on the motherboard; the NCR 0381034 chip is the PSSJ chip. Whether it's connected and receiving data is another question.

    On the PSSJ according to the sl technical documentation, pins 57 and 58 are audio out, which are near the C207 and 09 markings on your board, directly adjacent to a surface-mount capacitor. Are those pins connected to anything? They'll be fourth and fifth from the edge of the IC near the 09 marking, I think.
    I need to take it apart and compare it with another system while I'm at it.

    I did run the Tandy 64 demo, and it ran fine on the WS-1000 (colors etc) but no sound was output to the PC speaker.
    Demo: https://www.youtube.com/watch?v=m8xAGOXNCQI

    Also, the unit did boot DOS 3.3 just fine. The floppy drive I have is kind of flaky and doesn't always move it's head for some reason.
    https://www.youtube.com/watch?v=yu0OkriU9Bw

    This is a stock WS-1000, with just an added 128K memory (256K total) and a hand-built floppy controller card.

    Next steps are like you said; trace the pin outputs to see if they go anywhere. If they do, I can maybe tap into them and see if they're outputting sound now that I know I can run Tandy64.

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