Image Map Image Map
Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Setting up P1 mother board

  1. #1
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,344

    Default Setting up P1 mother board

    Hi!! It's been a long time since I online here, so busy with study these days

    Anyway, I've decided to rebuild my "spare parts" P166 machine!! It's in completely apart state, everything dismantled.

    I have 2 motherboard, but I will use "P51430VX/250DM EXPLORER II" board since it is dated 1995, the other is 1996. I want to use older one

    From what I gather, it is unbranded QUI board, but is not listed on their website. It's "jumperless" board.

    Here is the overview:


    Now, the computer was actually a 486 when new, and the motherboard, processor upgraded into 486 case before I owned it.

    My question are:

    How do I connect the PSU? it's old style of connector, one long strip with 2 connection plugs of PSU. they are labelled P6 and P8. Which one goes where?


    Also, have to wire up the power, reset, led switches etc, the board is marked where they should go, but how do I know the orientation of them? does it matter which way around they go?

    I will have 500MB hard drive and windows 95 version A for it.

    Thanks!

  2. #2
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,344

    Default

    hmm.. having some problem now.

    1995 motherboard is having problems... so now using 1996 one... just have to get floppy working now!

  3. #3
    Join Date
    Apr 2003
    Location
    Saginaw, MI, USA 48601
    Posts
    8,763
    Blog Entries
    9

    Default

    Well, glad ya got sum'n to work for ya. For future reference, the power wires alwayg go with the black wires together, next to each other, just like ya show them in the pic. The power switch can be tricky, and if ya hook them up wrong ya may blow the P.S. (voice of experience). There is usually a diagram on the P.S. label to show which color goes where. The reset switch prob'ly don't matter which way it goes, but the LED's do matter. They just won't work one way amd will work the other way 'round. It won't hurt anything if you plug one in backwards tho, so feel free to experiment. (Now what is really tricky is to setup one of those old boxes that have the LED display on the case to show the speed it's running at. I hate those things...so many jumpers!)

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

  4. #4
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,344

    Default

    Woo-hoo it's working now! Running Windows 95 version A (FAT16) on a 4.32GB hard disk. There was something wrong with the 470MB one, it kept quitting out of the installation.

    Those LED displays with the processor speed - how are they connected up? I can't work it out.

  5. #5
    Join Date
    Jul 2003
    Location
    Västerås, Sweden
    Posts
    6,277

    Default

    Normally, it is three rows of pins, of which the middle is ground. By jumpering two pins vertically, you light one section of the LED. Sometimes there is a circuit which is pre-programmed to light selected segments rather than letting you jumper it.

    It is not very dangerous to experiment by shortening jumpers until you get the right combination. Some motherboards with turbo support will even allow you two sets of LED displays depending on whether the turbo button is depressed or not.
    Anders Carlsson

  6. #6
    Join Date
    Apr 2003
    Location
    Saginaw, MI, USA 48601
    Posts
    8,763
    Blog Entries
    9

    Default

    Quote Originally Posted by dongfeng
    Woo-hoo it's working now! Running Windows 95 version A (FAT16) on a 4.32GB hard disk. There was something wrong with the 470MB one, it kept quitting out of the installation.

    Those LED displays with the processor speed - how are they connected up? I can't work it out.
    I dunno, all I ever managed to do was thru trial & error till I got it to display something.

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

  7. #7
    Join Date
    Jul 2003
    Location
    Västerås, Sweden
    Posts
    6,277

    Default

    Btw, if you have two fairly equal motherboards, of which one has plastic guides/guards around the ribbon cable connectors, choose that one! Not only will you reduce the risk of getting the cable the wrong way and possibly damage something, you also avoid accidentally bending and breaking pins on the motherboard.

    /been-there-done-that
    Anders Carlsson

  8. #8
    Join Date
    Apr 2003
    Location
    Saginaw, MI, USA 48601
    Posts
    8,763
    Blog Entries
    9

    Default

    Heh! I remember once breaking a motherboard by forcing a DIMM into the socket a little too hard...

    I used to have an old Everex case that had a little LED panel on the front which could be programmed to display whatever message you wanted, with horizontal scrolling. That was fun to play with. I'd set it up to display some really stupid stuff soometimes.

    --T
    Teach your children how to think, not what, and hold 'em close, not tight.
    _____________________________________________

    Please visit the Vintage-Computer Wiki. Contributers welcome.

  9. #9
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,344

    Default

    Thanks for the info

    I've tried setting up the LED board, but no luck. I just can't figure out how to get power to it.

    Here's the photo of it remove from the computer:


    The middle wmpty row of 8x2 pins is for the ribbon connector to the LED display itself.

    I have one cable left, so I assume it's to provide power to the LCD. it's a 1-pin to 1-pin connector cable.

    Any idea how to get power to the display?

    Thanks!

  10. #10
    Join Date
    Nov 2003
    Location
    London, England
    Posts
    1,344

    Default

    anyone?

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
  •