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    Seeding Randomness with a String

    Random numbers are great but sometimes you want them to be consistently random (an oxymoron!) so that you can rely on their pattern being the same. For example, in Magenta's Maze everything is...

    July 25th, 2017 08:38 AM

    RAND() in Assembler

    The puzzles of Magenta's Maze are generated using the barely sufficient rand() function supplied by MSC 5.1. There are some issues with this, most notably that the highest bit of the 16-bit word...

    July 24th, 2017 02:50 PM

    VINTAGE FLYERS from COMMODORE [1990] | It's a Pixel THING - Ep. 123

    This week I'll be showcasing some vintage flyers from the Amiga and Personal Computer families from Commodore that were being commercialized around 1990. Enjoy! VINTAGE FLYERS from COMMODORE |...

    July 23rd, 2017 04:08 AM

    C's itoa() in Assembler with mini-sprintf bonus

    I've been poking around for a quick way to convert 16-bit words into digit characters a la the itoa() function in C. I thought and searched a lot around dividing by constants and clever ways of...

    July 20th, 2017 01:14 PM

    CGA Tiny Font (4x4)

    In accordance with yesterday's entry on text rendering, I've now created the routine for a "tiny" font. What this does is take the 8x8 glyphs and compresses them into 4x4 squares by creating a sort...

    July 19th, 2017 08:38 AM
  • Recent Forum Posts


    I've been told that it's the thermal cycling that...

    I've been told that it's the thermal cycling that stresses things. Note that incandescent light bulbs usually blow when first turned on. When devices go from room temperature to powered on...

    DDS Today, 06:39 AM Go to last post

    Glad it's working!

    Glad it's working!

    zombienerd Today, 06:27 AM Go to last post

    Don't laugh! I was once told by our HVAC SME...

    Don't laugh!

    I was once told by our HVAC SME (Subject Matter Expert) that our buildings were allowed to heat up to 90F at night to expose marginal circuit packs.

    Since he had already shown that...

    DDS Today, 06:26 AM Go to last post
    Dwight Elvey

    I was looking at my notes. The one other thing...

    I was looking at my notes. The one other thing that was needed is that you
    set "no precomp", for the ST251.
    As I recall, it is best to use the 10us so the drive does autostepping.

    Dwight Elvey Today, 06:24 AM Go to last post

    5150 256 kb

    5150 256 kb of memory

    63 watt power supply (220Vac input)

    Full height floppy drive and card.

    Half height floppy drive.

    MDA card

    fjk61011 Today, 06:19 AM Go to last post