<?xml version="1.0"?>

<!DOCTYPE msxconfig SYSTEM "msxconfig2.dtd">

<msxconfig>

  <info>

    <name>Disk Interface</name>

    <manufacturer>Computer Mates</manufacturer>

    <code></code>

    <release_year></release_year>

    <description>External Double Sided Double Density 3.5" disk interface with drive.</description>

    <type>external disk drive</type>

  </info>

  <!--

   Registers shown on

   3F80, 3F88, 3F90, 3F98, 3FA0, 3FA8, 3FB0, 3FB8

   7F80, 7F88, 7F90, 7F98, 7FA0, 7FA8, 7FB0, 7FB8

   BF80, BF88, BF90, BF98, BFA0, BFA8, BFB0, BFB8

   FF80, FF88, FF90, FF98, FFA0, FFA8, FFB0, FFB8

   NYYRIKKI said:

   This seems to be more like copy of SVI-738 disk controller although I think

   side select is a bit different. This seems to be normal, not mirrored 16kB

   disk ROM. Control registers them self are mirrored meaning that A3, A4, A5,

   A14 and A15 signals are ignored. BIOS it self uses controller from

   #7FB8-#7FBF.

   Format options are:

   1 - 1 side

   2 - 2 sides

   3 - 1 side, double track

   4 - 2 sides, double track

   Quite interestingly it seems to write the original format option

   information inside OEM name on the disk boot sector.

  -->

  <devices>

    <primary slot="any">

      <secondary slot="any">

        <WD2793 id="Computer Mates Disk Interface diskROM/FDC">

          <connectionstyle>National</connectionstyle>

          <mem base="0x0000" size="0x10000"/> <!-- Verified: register mirroring on all pages! -->

          <rom>

            <sha1>06d44926ab82ac697a939c0f2a1a7642b5f68dce</sha1> <!-- dump without registers, original by Scarlettkitten -->

            <filename>computer_mates_disk_interface.rom</filename>

          </rom>

          <rom_visibility base="0x4000" size="0x4000"/> <!-- ROM only visible in page 1 -->

          <drives>1</drives>

        </WD2793>

      </secondary>

    </primary>

  </devices>

</msxconfig>