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  1. jim11662418

    IBM XT Clone Memory Question

    I was relating to a colleague my tale about troubleshooting memory issues on a XT clone motherboard with 640K RAM on board. I told him that I had found a defective 256K RAM chip and a defective 64K RAM chip. I said that I had a replacement 256K chip on hand but that I would have to order a 64K...
  2. jim11662418

    Composite Video

    I've recently acquired a vintage computer (specifically on Ohio Scientific C1P) that outputs composite video. Has anyone had success with adapters found on Amazon, eBay and other places that purport to convert composite video to VGA or HDMI? If not, what's an inexpensive way to display a...
  3. jim11662418

    Request for Info on Ohio Scientific Keyboard

    I recently acquired an OSI C1P on which, alas, the stabilizer for the space bar is missing. If someone who has an OSI keyboard would post a photo showing details of the stabilizer, I'm hopeful I could replicate a stabilizer using a piece of piano wire. Thanks in advance.
  4. jim11662418

    Question about Daisy Wheel Printers

    I have an IBM Wheelwriter that I'm trying to make emulate a Diablo 630 and thus have a question about daisy wheel printers that are capable of reverse printing: When reverse printing, does the printer: 1. print the character at its current position and then move the carriage to the left or...
  5. jim11662418

    Adding an External Disk Activity LED to an IBM PC with a Glitch Works XT-IDE Card

    Here's a quick, easy, cheap and easily reversible way to add an external disk activity LED to an IBM 5150 PC fitted with a Glitch Works XT-IDE card. Like many, if not most IBM 5150 PCs, my PC has two standard Tandon TM-100-2A floppy drives. Now that I have the XT-IDE card installed, I use the A...
  6. jim11662418

    mTCP SNTP Client and Daylight Saving Time

    When I booted up my PC this morning (the last Sunday in October) it seems that the mTCP SNTP client thought that it was an hour earlier than it actually was. Apparently Open Watcom C uses the old rules for falling back from Daylight Saving Time to Standard Time. Editing the TZ environment...
  7. jim11662418

    Puzzling Power Issue

    I have a 5150 PC and a 5170 AT, both with stock, original power supplies. Both were on this morning when I left the house for a walk. Both were off when I returned about an hour later even though both power switches were still in the "on" position. Both LCD monitors were in "standby". I turned...
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