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  1. Replies
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    I dont have an oscilloscope unfortunately.... ...

    I dont have an oscilloscope unfortunately....

    Is there a way otherwise to test the oscillator chip? I have an NTSC VIC. Maybe a Multimeter?
  2. Replies
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    243

    Pin 37 on the 6502 and Pin 35 on the VIC Chip...

    Pin 37 on the 6502 and Pin 35 on the VIC Chip both come up Low, not pulsing....

    Pin 8 on the 6502 is coming up at 5.02 V
  3. Replies
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    Mine is the later CR model with the C-64 style...

    Mine is the later CR model with the C-64 style power connector...

    The power on reset does as it should, stays low briefly then goes to high

    I am going to do the other checks listed for the...
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    196

    I have a few that I am going to modify with a...

    I have a few that I am going to modify with a coin cell battery and use, but wanted to make sure I could use either one on a couple of boards.....
  5. Replies
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    Dallas Clock Chip DS1287 / DS1287A

    Is there a difference between these two Dallas clock chip models?

    Can you use one in place of the other in a Motherboard?
  6. Replies
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    VIC-20 Video Issues

    Have my vic 20 board out of the case and desoldered from metal shield underneath but sitting on it. Have keyboard plugged in

    Have a din5 cable connected to rca audio and video cable. Going from...
  7. Replies
    22
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    907

    Thanks for the help....after changing a bunch of...

    Thanks for the help....after changing a bunch of chips, I found the bad one and replaced it....640K is back!!

    Appreciate all the help
  8. Replies
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    907

    Yes, it sadly appears I will be changing one chip...

    Yes, it sadly appears I will be changing one chip at a time.......wont changing a chip, booting it up, checking it, waiting for it to fully load, then shutting it down, rinse and repeat damage my old...
  9. Replies
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    907

    Reseated all the chips and still no change. I...

    Reseated all the chips and still no change. I didnt see anything suspect on the board either....still looking to see what the issue could be....
  10. Replies
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    907

    Didnt have a chance to look at this all...

    Didnt have a chance to look at this all weekend......hoping to finally do it tomorrow.....thanks again for the advice
  11. Replies
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    907

    Gonna give this a shot tomorrow....thanks for the...

    Gonna give this a shot tomorrow....thanks for the recommendations
  12. Replies
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    907

    This one: ...

    This one:

    http://www.minuszerodegrees.net/5160/ram/5160_ram_256_640.htm
  13. Replies
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    907

    640K on the Board

    640K on the Board
  14. Replies
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    907

    iBM PC XT - RAM Issue

    I havent opened it up yet as I wanted to ask....

    My IBM 5160 PC XT on boot is now only counting 256K of RAM instead of 640K like it should be. The machine and IBM Monitor has not been moved,...
  15. I am connecting the adapters via a floppy...

    I am connecting the adapters via a floppy connector off the power supply. They are getting lights and power, but I see no activity on them at all.....
  16. Sadly both of those (Master at 300 / Slave at 300...

    Sadly both of those (Master at 300 / Slave at 300 as well having Full Operating Mode to No) are already set like that and still no sight of the card on boot......just says not found.....
  17. According to the directions on the wiki page for...

    According to the directions on the wiki page for the Rev 1 board, you configure the BIOS with IDEXTCFG, but do the actual flashing from a command prompt and not from the XTIDECFG program.

    With the...
  18. Lo-tech Compact Flash Adapter Rev 1 Issues

    Having issues trying to get the Rev 1 Lo-Tech compact flash ISA Adapter working with a 4GB CF Card on both a Tandy 1000SL and a Tandy 1000TL. The BIOS was flashed using the Flash utility as...
  19. Replies
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    Excellent...thanks for the information. I do...

    Excellent...thanks for the information. I do boot it up frequently if not using it, but really let it load everything (it loads a DOS front end) and let it sit for a while before shutting it down. ...
  20. Replies
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    MFM Hard Drive Maintenance

    Hello all,

    Are there any maintenance procedures that are good to do with old MFM Drives to keep them in good, working condition or are they OK to leave as is in the system they are in. Just want...
  21. Replies
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    No, here is the only other info on the board... ...

    No, here is the only other info on the board...

    On the side of one of the VLB slots is a label K3338AABA which looks like its been taped overtop of another white label PKM-0038A

    On the bottom...
  22. Replies
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    Searching for Jumpers

    Hello all,

    I have an old 486 Motherboard labeled as DTK PKM-0038A and I cannot find any information on proper jumper settings. There are a bunch of other PKM-0038 models on stason and other...
  23. Replies
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    How old were they? The ones I do have are in...

    How old were they? The ones I do have are in great shape and are probably 20 years old or more.
  24. Replies
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    Stone, The clear flat protective bags you...

    Stone,

    The clear flat protective bags you mentioned, 3 3/4" square.....they are individual small bags for one disk correct? If so, I'd wanna get a bunch from you....

    It was mentioned about...
  25. Replies
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    3.5" Floppy sleeves

    Not sure if anyone has ever seen these available for sale or not, but figured I'd ask.

    In some boxes of 3.5 floppies, the disks are individually put in clear plastic soft pocket sleeves....was...
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