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  1. Dale Mahalko

    Old Mac with SCSI? Use "SCSI to Flash" adapter

    I have found an interesting potential solution to transfer data between an old antique Macintosh and a modern Mac or PC... an SD-card to SCSI interface, so you can use modern flash memory as a storage media for your old system. This has a number of potential uses, such as to replace old failing...
  2. Dale Mahalko

    Repairing / Restoring a 1995 Roland XP-50 synthesizer

    While looking for info about other old synthesizers, I came across a video from an electronics repair enthusiast that shows all the work that may be needed to fix an old synth and restore it to full working order. If you're looking for one to play with that may be cheap to buy because it's...
  3. Dale Mahalko

    3D printed, homemade 5.25" floppy drive

    It should be feasible to make a 3D printed hobbyist floppy drive at this point. There are certain parts of a floppy drive that must be high precision, but other parts which can be loose and sloppy. Spend the money only where precision is absolutely needed, and be cheap with the parts that don't...
  4. Dale Mahalko

    SD-card to SCSI adapter

    I have found another data storage option for people who want to play with old computer systems, but don't want to deal with old dying hard drives. Micro-SD to SCSI adapter, same size as 3.5" floppy/hard drive .. US$ 75...
  5. Dale Mahalko

    Antique floppy disks can harm your computer (Youtube)

    I hope a little self-promotion is okay here.. I have just uploaded an amateurish, uncut, single-shot, unmiked, unedited iPhone video documenting the problems you can have using antique floppy disks, and how a failing disk can make you have a really bad day with your old hardware.... I have...
  6. Dale Mahalko

    Are computers getting faster? ... comment

    (This is sorta off-topic here as it involves Pentium and multi-core (gasp) but is a comment on a past 8-bit guy video.) Regarding this video from 2016: Generally what has had the most impact on making computers live longer is the thermal limit that Intel hit back in about 2005 with the...
  7. Dale Mahalko

    Sinclair ZX80/81 assembly / machine code programming?

    Having watched this just now.. A question comes up regarding assembly language programming. Okay so the BASIC in ROM was pretty terrible and slow, but what were the assembly language capabilities of the system? Was there a way to directly write machine code for the Z80 processor using the...
  8. Dale Mahalko

    History of Asimov Apple II software library ????

    Does anyone know the history of the Asimov Apple II software library? It is an intriguing but mysterious part of the Apple II software history, a sort of bootleg software archive that as been around now for decades, but with no apparent history of where it came from or why it even exists at all...
  9. Dale Mahalko

    Atari 400 / 800 fan cooling mod?

    Has anyone ever tried modding a fan onto the Atari 400 / 800? The system had a terrible design due to stupid USA FCC restrictions in the 1970s, where the main CPU, memory, and ROMs are all inside a solid metal aluminum shell. Later the FCC relaxed the rules so that newer computers did not have...
  10. Dale Mahalko

    Extended version of 8-bit guy theme song?

    This is not specific to 8-bit Keys, but rather the 10 second intro song used in your youtube 8-bit guy videos. I just love sitting there and pressing left-arrow twice at the start of the 8-bit guy videos, to listen to it over and over. It would be nice to see an extended / full length...
  11. Dale Mahalko

    My TI-99/4A power supply died? There, I fixed it.

    Picture is from about 2000:
  12. Dale Mahalko

    Weird UNIX minicomputer I once had.. Unisys U6000/65

    I suppose I will share a bit of a story here about an antique server I had for a while. I can't find my old photos of the thing, so I am borrowing from someone else's CC-by photo collection at: http://wikimuseo.freaknet.org/index.php/UNISYS_U6000/50.html For a while I had in my possession a...
  13. Dale Mahalko

    Apple II analog joystick sampling rate?

    Does anyone know at what speed the Apple II analog joystick ports are sampled from analog to digital? What's the fastest speed that the joystick X/Y data can be read? I have no idea but it occurs to me that it might work as an 8-bit PCM audio input, even though an Apple II has laughably little...
  14. Dale Mahalko

    Hello, I'm just another middle-aged computer nerd..

    I don't have quite the energy of 8-bit guy and LGR and Techmoan to do many videos. I don't consider myself photogenic with my huge Coke-bottle glasses, no professional camera setup, just my iPhone on a tripod.. YouTube channel: Dale Mahalko's Antique Computing Youtube: Apple II: Nasty DOS 3.3...