<?xml version="1.0" ?>

<!DOCTYPE msxconfig SYSTEM 'msxconfig2.dtd'>

<msxconfig>

  <info>

    <manufacturer>Philips</manufacturer>

    <code>VG 8230</code>

    <release_year>1986</release_year>

    <description>First released MSX2 by Philips. With 64kB RAM and single sided disk drive.</description>

    <type>MSX2</type>

    <region>eu</region>

  </info>

  <MapperReadBackBits>largest</MapperReadBackBits>

  <CassettePort/>

  <devices>

    <PPI id="ppi">

      <sound>

        <volume>16000</volume>

      </sound>

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

      <keyboard_type>gb</keyboard_type>

      <has_keypad>false</has_keypad>

      <key_ghosting_sgc_protected>true</key_ghosting_sgc_protected>

      <code_kana_locks>false</code_kana_locks>

      <graph_locks>false</graph_locks>

    </PPI>

    <VDP id="VDP">

      <version>V9938</version>

      <vram>128</vram>

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

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

    </VDP>

    <PSG id="PSG">

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

      <sound>

        <volume>21000</volume>

      </sound>

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

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

    </PSG>

    <RTC id="Real time clock">

      <sramname>vg_8230.cmos</sramname>

      <io base="0xB4" num="2" type="O"/>

      <io base="0xB5" num="1" type="I"/>

    </RTC>

    <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>

    <primary slot="0">

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

        <rom>

          <filename>vg8230_basic-bios2.rom</filename>

          <sha1>0de3c802057560560a03d7965fcc4cff69f8575c</sha1>

        </rom>

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

      </ROM>

    </primary>

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

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

    <primary slot="3">

      <secondary slot="0">

        <ROM id="MSX Sub ROM">

          <rom>

            <filename>vg8230_msx2sub.rom</filename>

            <sha1>3288894e1be6af705871499b23c85732dbc40993</sha1> <!-- verified on 8230/00 from Luc -->

          </rom>

          <mem base="0x0000" size="0x4000"/> <!-- Verified on real MSX: no mirroring at all! -->

        </ROM>

      </secondary>

      <secondary slot="1"/>

      <secondary slot="2">

        <MemoryMapper id="Main RAM">

          <size>64</size>

          <initialContent encoding="gz-base64">eNpj+M8wouEI9z4DAJBx/wE=</initialContent> <!-- (chr(0) + chr(255)) * 128 + (chr(255)+ chr(0)) * 128) -->

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

        </MemoryMapper>

      </secondary>

      <secondary slot="3">

        <WD2793 id="Memory Mapped FDC">

          <connectionstyle>Philips</connectionstyle>

          <singlesided/>

          <drives>1</drives>

          <rom>

            <filename>vg8230_disk.rom</filename>

	    <sha1>b43a4be5c754f68dc3ee64eee29d64f30fac2aff</sha1> <!-- these two dumps are the same, except for the FDC registers -->

            <sha1>0f5798850d11b316a4254b222ca08cc4ad6d4da2</sha1>

          </rom>

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

          <mem base="0x4000" size="0x4000"/> <!-- Verified on real MSX: no mirroring at all! -->

        </WD2793>

      </secondary>

    </primary>

  </devices>

</msxconfig>