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  • 3.5" Floppies MDS-225
    by ISIS-MDS.COM on December 29, 2016 at 12:59 AM
    707 Views - 0 Comments

    We modified a 1982 Intel MDS-225 Microcomputer Development System to run 4 built-in 3.5 inch microfloppies. Still runs ISIS-II operating system and records original MMFM double density on the small media.

  • Booting the Intel MDS-800
    by ISIS-MDS.COM on September 10, 2016 at 4:39 PM
    1088 Views - 0 Comments

    Here we demonstrate booting an Intel MDS-800 into the ISIS-II V4.2 disk operating system and then booting into the ROM monitor with the disk drives disconnected.

  • USB on MDS-225 Demo
    by ISIS-MDS.COM on June 12, 2016 at 5:30 PM
    1345 Views - 0 Comments

    Here I demo three ISIS-II Utilities I wrote to support the USB Flashdrive Host attached through my Adapter Board to the MDS IPC CPU card.

  • MDS-225 gets USB
    by ISIS-MDS.COM on June 9, 2016 at 8:59 PM
    1226 Views - 0 Comments

    We adapted a Hobbytronics USB Flashdrive Host to an Intel MDS-225 Development System with an MDS-IPC-USART adaptor board and a couple of ISIS-II user utilities. More info can be found at

  • iPDS-100 repackaged
    by ISIS-MDS.COM on May 20, 2016 at 1:43 PM
    1118 Views - 4 Comments

    Intel originally packaged the iPDS-100 personal development system in a clumsy, heavy, awkward, "portable" case with a tiny 9" green CRT display and a very clunky keyboard on a short tether and an even clunkier 5.25" SA460 floppy drive. These units suffered from a lot of component failures. In 2016, if you find one to buy, it's for sure the software is missing.

  • Zendex AQ-85 Monitor
    by ISIS-MDS.COM on May 19, 2016 at 1:14 PM
    917 Views - 0 Comments

    The 1981 Zendex AQ-85 Monitor was intended to replace the Intel MDS Monitor in the Intel MDS-225 Microcomputer Development System. It also shipped with the Zendex ZX-85 CPU card which was hardware and software compatible with the MDS-225. In fact, the ZX-85 could replace the IPC completely, or form the basis of a Zendex Microcomputer Development System. Three unusual AQ-85 commands allowed (F) the format of a DD Intel MMFM 8" disk, (W) write selected tracks/sectors from a 128-byte memory buffer, and (R) read a selected track/sector to a 128-byte memory buffer.

  • Demo of Intel Series-IV
    by ISIS-MDS.COM on May 15, 2016 at 2:12 AM
    859 Views - 0 Comments

    Progress report on the restoration of a dead Series-IV with no software. Floppies were converted to 3.5" 720K and disk images downloaded as IMD files and used on an IBM 5170 and an Adaptec AHA-1522A FDC to write new bootable disks using Dave Dunfield's IMD utility.

  • Intel iPDS-100 External F.D.
    by Mustafa A. Katie on September 14, 2013 at 7:55 AM
    3907 Views - 2 Comments

  • Intel iPDS-100 PL/M-51
    by Mustafa A. Katie on September 13, 2013 at 9:22 AM
    3270 Views - 0 Comments

  • Intel iPDS-100 ASM-86
    by Mustafa A. Katie on September 10, 2013 at 9:26 AM
    3337 Views - 0 Comments

  • Intel iPDS-100 ISIS Commands
    by Mustafa A. Katie on September 10, 2013 at 8:50 AM
    3774 Views - 0 Comments

  • Intel iPDS-100 Test The H/W
    by Mustafa A. Katie on September 10, 2013 at 8:40 AM
    1798 Views - 0 Comments

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