<?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>
