<?xml version="1.0" ?>

<!DOCTYPE msxconfig SYSTEM 'msxconfig2.dtd'>

<msxconfig>

  <info>

    <manufacturer>Sanyo</manufacturer>

    <code>PHC-23J(B)</code>

    <release_year>1987</release_year>

    <description>A basic blue MSX2...</description>

    <type>MSX2</type>

    <region>jp</region>

  </info>

 <!-- Confirmed (except RAM pattern) by Peter Hanraets on serial number

      61265468

   -->

  <CassettePort/>

  <devices>

    <S1985 id="S1985"> <!-- includes 5 bits mapper-read-back -->

      <sramname>phc-23jb_s1985.sram</sramname>

    </S1985>

    <PPI id="ppi">

      <io base="0xA8" num="8"/> <!-- S-1985 mirrors -->

      <sound>

        <volume>16000</volume>

      </sound>

      <keyboard_type>jp_jis</keyboard_type>

      <has_keypad>true</has_keypad>

      <key_ghosting_sgc_protected>false</key_ghosting_sgc_protected>

      <code_kana_locks>true</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-1985 mirrors -->

      <io base="0x98" num="8" type="I"/> <!-- S-1985 mirrors -->

    </VDP>

    <PSG id="PSG">

      <type>YM2149</type> <!-- in S-1985 MSX-ENGINE -->

      <keyboardlayout>JIS</keyboardlayout>

      <sound>

        <volume>21000</volume>

      </sound>

      <io base="0xA0" num="8" type="IO"/> <!-- S-1985 mirrors -->

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

    </PSG>

    <RTC id="Real time clock">

      <sramname>phc-23jb.cmos</sramname>

      <io base="0xB4" num="4" type="IO"/> <!-- S-1985 mirrors -->

    </RTC>

    <PrinterPort id="Printer Port">

      <io base="0x90" num="8" type="IO"/> <!-- S-1985 mirrors -->

      <bidirectional>true</bidirectional> <!-- S-1985 feature (but not used, nor implemented) -->

      <unused_bits>0x00</unused_bits>

    </PrinterPort>

    <primary slot="0">

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

        <rom>

          <filename>phc-23jb_basic-bios2.rom</filename>

          <sha1>4ce41fcc1a603411ec4e99556409c442078f0ecf</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>phc-23jb_msx2sub.rom</filename>

            <sha1>fd9fa78bac25aa3c0792425b21d14e364cf7eea4</sha1>

          </rom>

          <mem base="0x0000" size="0x4000"/>

        </ROM>

      </secondary>

      <secondary slot="1"/>

      <secondary slot="2">

        <RAM id="Main RAM">

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

          <initialContent encoding="hex">0000FFFFFFFF0000</initialContent>

          <!-- on serial number 61265468 the pattern is like this, but after 256 bytes the pattern inverts for another 256 bytes. Then starts again. -->

        </RAM>

      </secondary>

      <secondary slot="3"/>

    </primary>

  </devices>

</msxconfig>