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P2 Z8 emulator — Parallax Forums

P2 Z8 emulator

Hello,
is there a Z8 emulator for the P2?

Comments

  • msrobotsmsrobots Posts: 3,490

    I just know of a Z80 by @Cluso99

    Mike

  • Z8 is not Z80.

  • Cluso99Cluso99 Posts: 18,020

    I used many hundreds of thousands of Z8 (Z8681 Romless) in my modem designs etc back in the late 80's. Very nice chip!
    But I haven't seen an emulation of the Z8.

  • I used the Z8 extensively in the '80s for fruit sizing and sorting. One installation had eight Z8-controlled linescan cameras connected to eight Z8-controlled conveyor solenoids (via Opto-22 drivers). These were all networked together via RS422 to a central Z8 master controller operating a Tektronix touchscreen terminal.

    I loved the Z8's register-to-register architecture, with multiple addressing modes. But I loved even more its successor, the Super 8 (S8). It had pretty much the same architecture as the Z8, but with additional instructions optimized for Forth. It was only available in NMOS and ran HOT! Unfortunately Zilog dropped the S8 before it had a chance to find its niche in the marketplace. I incorporated the one S8 chip that I had into a stepper controller for a small 3-axis mill that I used at the time for making molds for fishing jigs (Point Wilson DART). The interface software was written in Forth.

    -Phil

  • Z8 thread discovered in the wilderness and cajoled back into action!

  • Cluso99Cluso99 Posts: 18,020

    @VonSzarvas said:
    Z8 thread discovered in the wilderness and cajoled back into action!

    Thanks :)

  • Here is a link to the emulator of U. Nickel, and some amateur replicas.
    https://hc-ddr.hucki.net/wiki/doku.php/tiny/propeller_tiny

  • jmgjmg Posts: 14,857

    @"Phil Pilgrim (PhiPi)" said:

    I loved the Z8's register-to-register architecture, with multiple addressing modes. But I loved even more its successor, the Super 8 (S8). It had pretty much the same architecture as the Z8, but with additional instructions optimized for Forth. It was only available in NMOS and ran HOT! Unfortunately Zilog dropped the S8 before it had a chance to find its niche in the marketplace.

    Zilog bought the S3 family from Samsung, which was a Z8 variant, and still supply that series,
    That mentions SAM86 and SAM88 cores, not sure where they sit on the Z8 ~ Super8 spectrum ?

    Zilog also rebadged a few ABOV 8051 parts as Z51F, but never seemed to quite know what to do with that.

  • Cluso99Cluso99 Posts: 18,020

    I used a Z8 and a Z8530 SCC on a Communications Card we built for Apple to connect Apple //e and Apple /// micros to IBM Mainframes. The Apple emulated a 3270/3274 IBM screen to the mainframes.

    Also designed boards plugging into an ICL Minicomputer motherboard with a pair of Z8s, one with 8 x Z8530 SCCs connected to 16 serial ports. One of my customers had 128 remote PCs around Australia connected by 9600 baud leased lines to their ICL mini using my boards.

  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,099
    edited 2021-11-20 20:11

    Z8 thread discovered in the wilderness and cajoled back into action!

    Thank you! It even resurrected the post that the forum software said I couldn't post! How does that work?

    -Phil

  • Cluso99Cluso99 Posts: 18,020
    edited 2021-11-21 02:20

    Here are some of the products I designed using the Z8681 Romless micro. Probably close to 500,00 Z8's used.
    Oh for the P2 back then :(




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