<?xml version="1.0" ?>

<!DOCTYPE msxconfig SYSTEM 'msxconfig2.dtd'>

<msxconfig>

  <info>

    <manufacturer>Victor</manufacturer>

    <code>HC-90A</code>

    <release_year>1988</release_year>

    <description>A top notch MSX2, but note: superimpose and turbo mode are not yet implemented! With 1 disk drive, RS-232C interface, kanji ROM and system control software built in.</description>

    <type>MSX2</type>

    <region>jp</region>

  </info>

  <!-- based on machine with serial 10210636, thanks to Daniel Padilla who

       dumped ROMs directly and made photos available on

       https://drive.google.com/drive/folders/1U1Vc9ex6tGCqYNN6n_N25PAOjjCvtxMx 

       CPU: NEC D780C-1 (IC018)

       CPU2: HD64B180ROP

       serial 1: NEC D8251AFC (IC019)

       serial 2: NEC D8253C-5 (IC027)

       PPI: NEC D8255AC-5 (IC038)

       PSG: Yamaha YM2149F (IC051)

       (Kanji?) ROM: Toshiba TC531000AP (IC056?)

       Turbo mode ROM: NEC D27C256AD-12 labeled JVC 019 E (IC040)

       RS-232C/System ROM: NEC D27C256AD-12 labeled JVC 024 C (IC052)

       Sub ROM: Toshiba TMM23128P (IC034)

       MSX2BASIC ROM: Toshiba TMM23256P (IC023)

       Clock chip: RICOH (IC081)

       -->

  <MapperReadBackBits>largest</MapperReadBackBits>

  <CassettePort/>

  <devices>

    <Kanji id="Kanji ROM">

      <rom>

        <filename>hc90a_kanjifont.rom</filename>

        <sha1>db03211b7db46899df41db2b1dfbec972109a967</sha1>

      </rom>

      <io base="0xD8" num="2" type="O"/>

      <io base="0xD9" num="1" type="I"/>

    </Kanji>

    <PPI id="ppi">

      <sound>

        <volume>16000</volume>

      </sound>

      <io base="0xA8" num="4"/>

      <keyboard_type>jp_ansi</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="4" type="O"/>

      <io base="0x98" num="2" type="I"/>

    </VDP>

    <PSG id="PSG">

      <keyboardlayout>50on</keyboardlayout>

      <type>YM2149</type> <!-- YM2149F chip on mobo -->

      <sound>

        <volume>21000</volume>

      </sound>

      <io base="0xA0" num="4" type="IO"/>

      <ignorePortDirections>false</ignorePortDirections> <!-- not sure, but guess based on discrete PSG chip -->

    </PSG>

    <RTC id="Real time clock">

      <sramname>hc90a.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="2"/>

    </PrinterPort>

    <primary slot="0">

      <secondary slot="0">

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

          <rom>

            <filename>C023 MSX2BASIC TMM23256.BIN</filename>

            <sha1>0081ea0d25bc5cd8d70b60ad8cfdc7307812c0fd</sha1> <!-- direct EPROM dump by Daniel Padilla -->

          </rom>

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

        </ROM>

      </secondary>

      <secondary slot="1">

        <ROM id="MSX Sub ROM">

          <rom>

            <filename>MSX2BASICEXT TMM23128P.BIN</filename>

            <sha1>b8e30d604d319d511cbfbc61e5d8c38fbb9c5a33</sha1> <!-- direct ROM dump by Daniel Padilla -->

          </rom>

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

        </ROM>

        <MSX-RS232 id="MSX RS-232">

          <rom> <!-- both RS-232C and system control ROM (trigger menu with ESC while booting), first half of IC052 JVC 024 C 27C256 -->

            <sha1>c991440778d5dc9ba54cc0e0f8e032d2f451366f</sha1> <!-- direct ROM dump by Daniel Padilla -->

            <filename>IC052 RS232C FDD JVC024C 27C256.BIN</filename>

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

          </rom>

          <io base="0x80" num="8"/>

          <mem base="0x4000" size="0x3FF8"/>

        </MSX-RS232>

        <!-- NOTE: the FDC registers at 0x7FF8-0x7FFC

             are visible in both slot 0-1 and slot 3. -->

        <Mirror id="FDC registers">

          <mem base="0x7FF8" size="5"/>

          <ps>3</ps>

        </Mirror>

        <VictorHC9xSystemControl id="System control">

          <mem base="0x7FFD" size="1"/>

        </VictorHC9xSystemControl>

      </secondary>

      <secondary slot="2">

        <MemoryMapper id="Main RAM">

          <size>256</size>

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

        </MemoryMapper>

      </secondary>

    </primary>

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

    <primary slot="3">

      <WD2793 id="Memory Mapped FDC"> <!-- see http://usbsecretbase.michikusa.jp/hc-95/fdc.html -->

        <connectionstyle>Victor</connectionstyle>

        <mem base="0x4000" size="0x3FFD"/>

        <rom>

          <sha1>c991440778d5dc9ba54cc0e0f8e032d2f451366f</sha1> <!-- direct ROM dump by Daniel Padilla, 2nd half of IC052 JVC 024 C 27C256 -->

          <filename>IC052 RS232C FDD JVC024C 27C256.BIN</filename>

          <window base="0x4000" size="0x4000"/>

        </rom>

        <drives>1</drives>

      </WD2793>

      <!-- NOTE: the system control register at 0x7FFD

           is visible in both slot 0-1 and slot 3. -->

      <Mirror id="System control register">

        <mem base="0x7FFD" size="1"/>

        <ps>0</ps>

        <ss>1</ss>

      </Mirror>

    </primary>

  </devices>

</msxconfig>