<?xml version="1.0" ?>

<!DOCTYPE msxconfig SYSTEM 'msxconfig2.dtd'>

<msxconfig>

  <info>

    <manufacturer>Yamaha</manufacturer>

    <code>YIS-503IIR</code>

    <release_year>1985</release_year>

    <description>USSR version of the YIS-503II, targeted for schools. With network module (not emulated).</description>

    <type>MSX</type>

    <region>ru</region>

  </info>

<!-- Note that the network module is not emulated. It's a module similar to the

Yamaha SFG-01/05 regarding physical shape and how it connects to the MSX. -->

  <CassettePort/>

  <devices>

    <primary slot="0">

      <ROM id="MSX BIOS with BASIC ROM">

        <mem base="0x0000" size="0x8000"/>

        <rom>

          <sha1>807a823d4cac527c9f3758ed412aa2584c7f6d37</sha1>

          <filename>yis-503iir_basic-bios.rom</filename>

        </rom>

      </ROM>

    </primary>

    <primary external="true" slot="1"/>

    <primary external="true" slot="2"/>

    <primary slot="3">

      <secondary slot="2">

        <RAM id="Main RAM">

          <mem base="0x0000" size="0x10000"/>

        </RAM>

      </secondary>

    </primary>

    <PPI id="ppi">

      <io base="0xA8" num="8"/> <!-- S-3527 mirrors -->

      <sound>

        <volume>16000</volume>

      </sound>

      <keyboard_type>ru</keyboard_type>

      <has_keypad>false</has_keypad>

      <key_ghosting_sgc_protected>true</key_ghosting_sgc_protected>

      <code_kana_locks>true</code_kana_locks>

      <graph_locks>false</graph_locks>

    </PPI>

    <VDP id="VDP">

      <io base="0x98" num="8" type="O"/> <!-- S-3527 mirrors -->

      <io base="0x98" num="8" type="I"/> <!-- S-3527 mirrors -->

      <version>V9938</version>

      <vram>16</vram>

    </VDP>

    <PSG id="PSG">

      <type>YM2149</type> <!-- in S-3527 MSX-ENGINE -->

      <io base="0xA0" num="8" type="IO"/> <!-- S-3527 mirrors -->

      <sound>

        <volume>21000</volume>

      </sound>

      <ignorePortDirections>true</ignorePortDirections> <!-- not sure, but guess based on use of Engine IC -->

    </PSG>

    <PrinterPort id="Printer Port">

      <io base="0x90" num="8" type="IO"/> <!-- S-3527 mirrors -->

      <status_readable_on_all_ports>true</status_readable_on_all_ports> <!-- S-3527 property -->

    </PrinterPort>

  </devices>

</msxconfig>