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  • lowen's Avatar
    November 23rd, 2020, 04:01 PM
    ZSM4 from hperaza might fit the bill: https://github.com/hperaza/ZSM4 Also see http://p112.sourceforge.net/index.php?zsm4
    4 replies | 116 view(s)
  • lowen's Avatar
    November 12th, 2020, 06:32 AM
    Sure; I have a 32-bit Intel based thin client right here, an HDS ViewStation X terminal. See https://zanchey.ucc.asn.au/pub/HDS-manual/1-1.ps.pdf...
    6 replies | 174 view(s)
  • lowen's Avatar
    November 11th, 2020, 04:58 PM
    You need to visit gp2000's http://48k.ca web page, where he describes beamracing, or as he calls it beamhacking, on the TRS-80 Model III in detail.
    7 replies | 268 view(s)
  • lowen's Avatar
    November 1st, 2020, 09:43 AM
    lowen replied to a thread The constant voltage machine in S-100
    Hugo, nicely done. Motorized variacs are fairly standard high power voltage regulators in industrial lab settings; I have an older rack mount unit...
    23 replies | 819 view(s)
  • lowen's Avatar
    October 29th, 2020, 02:05 PM
    Networking as we know it? Hmm, packet-switched, in other words, instead of circuit-switched. Again, this is ARPAnet. Which was developed and...
    26 replies | 1257 view(s)
  • lowen's Avatar
    October 29th, 2020, 10:32 AM
    Internet is much older than 8088..... :-) BBN would be insulted. EDIT: Of course, you'd need a 56K leased line, a CSU/DSU, and a synchronous serial...
    26 replies | 1257 view(s)
  • lowen's Avatar
    October 29th, 2020, 06:29 AM
    lowen replied to a thread Z80 speed in Tandy/Radio Shack
    The FPGA Z80 core I've thought about trying out is Monte's Y80 core from his book "Microprocessor Design Using Verilog HDL" available on Amazon. If...
    18 replies | 950 view(s)
  • lowen's Avatar
    October 28th, 2020, 08:26 PM
    lowen replied to a thread Z80 speed in Tandy/Radio Shack
    The current production Zilog Z8S180 is the one I'm talking about; it's a superset of the HD64180.
    18 replies | 950 view(s)
  • lowen's Avatar
    October 28th, 2020, 08:06 PM
    lowen replied to a thread Z80 speed in Tandy/Radio Shack
    Your recollection is incorrect; Z180 implements all of the documented Z80 instructions. You're thinking Rabbit CPUs, which, IIRC, you have some...
    18 replies | 950 view(s)
  • lowen's Avatar
    October 28th, 2020, 08:03 PM
    lowen replied to a thread Over clocking a 4 in Tandy/Radio Shack
    Yes, many times. I know of several (David Dalager was one, but there were several, some documented in Computer News 80) who achieved 5+ MHz with...
    4 replies | 301 view(s)
  • lowen's Avatar
    October 28th, 2020, 07:39 PM
    lowen replied to a thread Prowam in Tandy/Radio Shack
    Totally agreed. Wish we had source. I honestly doubt Roy has any interest in TRS-80 stuff anymore, based on things I've heard and read.
    3 replies | 210 view(s)
  • lowen's Avatar
    October 28th, 2020, 07:28 PM
    lowen replied to a thread Prowam in Tandy/Radio Shack
    https://www.tim-mann.org/trs80/Wamed.zip contains the droids you're looking for.
    3 replies | 210 view(s)
  • lowen's Avatar
    October 28th, 2020, 06:06 AM
    lowen replied to a thread Stealth Ian in Tandy/Radio Shack
    Thanks for the good info, Hans. I was planning on using other tools to make the HD image, since I'm a little familiar with the F48 already. Hmm, an...
    8 replies | 510 view(s)
  • lowen's Avatar
    October 27th, 2020, 04:43 PM
    lowen replied to a thread Z80 speed in Tandy/Radio Shack
    Yeah, 20MHz Z80 in DIP, QFP, and PLCC are also current production. Plasmo has gotten the 20MHz Z80 overclocked quite a ways.
    18 replies | 950 view(s)
  • lowen's Avatar
    October 27th, 2020, 04:36 PM
    lowen replied to a thread Stealth Ian in Tandy/Radio Shack
    Hans, I bought one of the F48's Ian has on eBay, and I hope to be able to set aside time to work on the LS-DOS autoboot. There are two approaches...
    8 replies | 510 view(s)
  • lowen's Avatar
    October 27th, 2020, 04:32 PM
    lowen replied to a thread Z80 speed in Tandy/Radio Shack
    Speaking from the point of view of having a little bit of experience with the eZ80, this is indeed the greatest obstacle; there are ways of forcing...
    18 replies | 950 view(s)
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About lowen

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About lowen
Location:
Western North Carolina, USA
Interests:
TRS-80, other assorted vintage gear. Tube amps and transmitters. Amateur Radio
Occupation:
CIO, IT department.

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--
Thus spake Tandy Xenix System III version 3.2: "Bughlt: Sckmud Shut her down Scotty, she's sucking mud again!"

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