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Thread: Acquired a Tandy 3000NL got questions

  1. #11
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    Quote Originally Posted by dlightman View Post
    The 3000NL is one of my favorite Tandy's! It's pretty much a no frills 10 Mhz 286 AT system. I added the 8MB memory card, Tandy 1MB SVGA card, IDE interface with a 1G DOM and a ethernet card with an EEPROM containing the XUB.
    I know that IDE doesn't require much to interface with the bus, but I've never seen a card that barebones before!
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, Tandy 1100FD, Tandy 64K CoCo 2, Commodore VIC-20, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  2. #12
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    Those have to be gals/pals. The most basic ide card has about half a dozen chips and maybe a room. I have a similarly sized card, 3 74ls and a square Goldstar chip.

  3. #13
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    Sandblasting isn't necessary. You could use electrolysis - easy and cheap, when there's a lot of rust. Industrial Scotch Brite pads with oil or washing soda and vinegar for lighter corrosions.

  4. #14

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    The IDE card is a Microflex UTC-3001i. They were popular in the the IDE cdrom era, super simple but can only be configured as a secondary, tertiary or quaternary controller. The 2 chips are a ATF20V8BQL EEPLD and HD74LS245P.

  5. #15
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    Quote Originally Posted by dlightman View Post
    The IDE card is a Microflex UTC-3001i. They were popular in the the IDE cdrom era, super simple but can only be configured as a secondary, tertiary or quaternary controller. The 2 chips are a ATF20V8BQL EEPLD and HD74LS245P.
    Well, the 245 is a jellybean, but a dump of that PLD might be cool. It'll have the functional equivalent of a 668 in it for address selection, but I'm curious as to what else might be in it.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, Tandy 1100FD, Tandy 64K CoCo 2, Commodore VIC-20, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  6. #16

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    @dlightman actually I found one of those 8M expansion boards on ebay, was mislabeled as a t5000 expansion but I got someone to get me p/n on the his board and it was the same as that one. waiting on delivery (Tuesday this week)
    well I have been diligently working on it, Ill post a blog about it later, its been a lot of fun, and right now I am at the stage that it boots, I get Long -short short - long beeps, then after about 10-15 seconds a short-short beep.
    still waiting on my vga card I ordered (arrives Tuesday) and then I can connect a lcd vga screen to it and see why its all beeping at me. theST225 seemingly is a beast it powered up like it was only yesterday it was built. no bearing noises, further on boot/working status on that. but I have options if it does not.
    A couple of pictures of before and after on the restoration, yes the whole thing needed a lot of elbow grease but it really come out nice.

    Power Supply Before and after



    assembled


    anyways more to come later
    Attached Images Attached Images

  7. #17

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    well its been a few weeks since I got the beast and well its bee n a long haul of work, full chassis/case/cover sanding and painting, restoration of the PSU entirely blown all its caps, both 3.5 and 5.25 drives where dead. the MFM card and ST225 just did not make ti either, so after some soul searching I resolved to keep pressing on , ordered a ISA-16 to IDE card. I have a floppy drives but the system seem to be acting out in two way.

    Problem 1.
    Using the Tandy cable (one that has holes on it) the driv4es remain lit like it was inverted, and inverting the cable doesn't actuate the drives. so weather the controller is bad or the cable is bad (wait for next problem) (drives/floppies tested on another PC just fine)

    so when I boot my system I get 512K with 0000 extended.
    I have an Extended memory card with 2MB on it, I tested the ram sticks pairs on the main board extended slot all pairs register 512K just fine on the main board.

    problems 2a
    I have the two extended slots and the main ram area loaded and I only get 512k instead of 640K . I have checked twice my jumpers are they are E23-34 and E22-21 as per manual
    Problem 2b (related I am sure in some way)
    when I change the jumpers and remove the extended (512K on sims) from board and put the extended 2MB board in the slot, the system as it has no ram, system refuses to boot at all. (ignoring the ram in Main board)
    I also removed the Main board ram, and go same result with extended filled, I still only get 512K ram.

    so I will assume at this point that ram (main board is bad) but it doesn't explain why the extended board doesn't work. is there a "CHIP" I should try to test that would explain this ?

    help?

  8. #18
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    Well, first thing I'd check for problem 1 is to replace the cable if you suspect that it's bad, and check around the floppy header and floppy drive controller chip for corrosion. I'm trying to find a service manual for the 3000NL to see which chip it might be.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, Tandy 1100FD, Tandy 64K CoCo 2, Commodore VIC-20, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

  9. #19

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    any luck finding a service manual for the 3000?

  10. #20
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    Quote Originally Posted by Patrick Bureau View Post
    any luck finding a service manual for the 3000?
    I sent you a private message on that, with some other things to try.

    Anybody else is welcome to try their hand at Google-fu, but this one's pretty obscure.
    My vintage systems: Tandy 1000 HX, Tandy 1000 RSX, Tandy 1100FD, Tandy 64K CoCo 2, Commodore VIC-20, and some random Pentium in a Hewitt Rand chassis...

    Some people keep a classic car in their garage. Some people keep vintage computers. The latter hobby is cheaper, usually takes less space, and is less likely to lead to a fatal accident.

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