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pce.cpp: add support for Tennokoe Bank extended Backup RAM [Angelo Salese]
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angelosa
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902c4589e9
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@ -3882,6 +3882,7 @@
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<publisher>Hudson</publisher>
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<info name="release" value="19910906"/>
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<part name="cart" interface="pce_cart">
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<feature name="slot" value="tennokoe" />
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<dataarea name="rom" size="131072">
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<rom name="tennokoe bank (japan).pce" size="131072" crc="3b3808bd" sha1="8ade1c698e0cb96ce3ed01986c7e5268aa5a1451" offset="000000" />
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</dataarea>
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@ -20,7 +20,8 @@
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DEFINE_DEVICE_TYPE(PCE_ROM_STD, pce_rom_device, "pce_rom", "PCE/TG16 Carts")
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DEFINE_DEVICE_TYPE(PCE_ROM_CDSYS3, pce_cdsys3_device, "pce_cdsys3", "PCE/TG16 CD-System Cart v3.00")
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DEFINE_DEVICE_TYPE(PCE_ROM_POPULOUS, pce_populous_device, "pce_populous", "PCE Populous Cart")
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DEFINE_DEVICE_TYPE(PCE_ROM_SF2, pce_sf2_device, "pce_sf2", "PCE Street Fighters 2 Cart")
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DEFINE_DEVICE_TYPE(PCE_ROM_SF2, pce_sf2_device, "pce_sf2", "PCE Street Fighter 2 CE Cart")
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DEFINE_DEVICE_TYPE(PCE_ROM_TENNOKOE, pce_tennokoe_device, "pce_tennokoe", "PCE Tennokoe Bank Cart")
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pce_rom_device::pce_rom_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
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@ -49,6 +50,12 @@ pce_sf2_device::pce_sf2_device(const machine_config &mconfig, const char *tag, d
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{
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}
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pce_tennokoe_device::pce_tennokoe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: pce_rom_device(mconfig, PCE_ROM_TENNOKOE, tag, owner, clock),
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device_nvram_interface(mconfig, *this)
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{
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}
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//-------------------------------------------------
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// mapper specific start/reset
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@ -65,7 +72,54 @@ void pce_sf2_device::device_reset()
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m_bank_base = 0;
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}
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void pce_tennokoe_device::device_start()
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{
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save_item(NAME(m_bram));
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save_item(NAME(m_bram_locked));
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}
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void pce_tennokoe_device::device_reset()
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{
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m_bram_locked = 1;
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}
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// Tennokoe Bank is a special HuCard containing x4 Backup RAM banks,
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// the software can transfer
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void pce_tennokoe_device::nvram_default()
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{
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memset(m_bram, 0xff, m_bram_size);
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// easter egg: load copy of a BRAM (debug leftover?) inside bank 4.
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// Contains 14 save blocks, mostly at the end of the various games.
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// Not entirely correct but not incorrect as well to just unlock these saves for public use,
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// for testing reasons and for a slim chance of actually be supposed as default data in the bank(s)
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// File list:
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// 001 NEUTOPIA1
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// 002 MOTURBO-1
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// 003 MOMODE2-1
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// 004 MOMOKATSU.
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// 005 BOMBERMAN1
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// 006 POPULOUS.
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// 007 ADVENTURE1 (Starts in HuMan form at the village with 983040 gold, basically before the last dungeon);
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// 008 TENGAI1
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// 009 COBRA1
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// 010 YS.DATA.01 (right before the switch between Ys 1 and 2, read book to move on);
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// 011 YS.DATA.02
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// 012 YS3.DAT.01 (right before the end, go to the right bridge for the ending);
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// 013 URUSEI1
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// 014 MITUBATI1
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// TODO: document the other saves.
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memcpy(m_bram + 0x1800, m_rom + 0x8800, 0x800);
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}
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void pce_tennokoe_device::nvram_read(emu_file &file)
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{
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file.read(m_bram, m_bram_size);
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}
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void pce_tennokoe_device::nvram_write(emu_file &file)
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{
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file.write(m_bram, m_bram_size);
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}
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/*-------------------------------------------------
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mapper specific handlers
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@ -123,3 +177,45 @@ WRITE8_MEMBER(pce_sf2_device::write_cart)
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if (offset >= 0x1ff0 && offset < 0x1ff4)
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m_bank_base = offset & 3;
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}
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READ8_MEMBER(pce_tennokoe_device::read_cart)
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{
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switch((offset & 0xf0000) >> 16)
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{
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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return m_rom[offset];
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case 8:
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if (m_bram_locked)
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return 0xff;
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else
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return m_bram[offset & (m_bram_size-1)];
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}
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logerror("tennokoe: ROM reading at %06x\n",offset);
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return 0xff;
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}
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WRITE8_MEMBER(pce_tennokoe_device::write_cart)
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{
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switch((offset & 0xf0000) >> 16)
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{
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case 8:
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if(!m_bram_locked)
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m_bram[offset & (m_bram_size-1)] = data;
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break;
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case 0xf:
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// TODO: lock/unlock mechanism is a complete guess, needs real HW study
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// (writes to ports $c0000, $d0000, $f0000)
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m_bram_locked = (data == 0);
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default:
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logerror("tennokoe: ROM writing at %06x %02x\n",offset,data);
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break;
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}
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}
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@ -6,6 +6,7 @@
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#pragma once
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#include "pce_slot.h"
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#include "machine/nvram.h"
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// ======================> pce_rom_device
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@ -77,11 +78,41 @@ private:
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uint8_t m_bank_base;
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};
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// ======================> pce_tennokoe_device
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class pce_tennokoe_device : public pce_rom_device,
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public device_nvram_interface
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{
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public:
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// construction/destruction
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pce_tennokoe_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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// reading and writing
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virtual DECLARE_READ8_MEMBER(read_cart) override;
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virtual DECLARE_WRITE8_MEMBER(write_cart) override;
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protected:
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void nvram_default() override;
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virtual void nvram_read(emu_file &file) override;
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virtual void nvram_write(emu_file &file) override;
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private:
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const uint32_t m_bram_size = 0x800*4;
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uint8_t m_bram[0x800*4];
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uint8_t m_bram_locked;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(PCE_ROM_STD, pce_rom_device)
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DECLARE_DEVICE_TYPE(PCE_ROM_CDSYS3, pce_cdsys3_device)
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DECLARE_DEVICE_TYPE(PCE_ROM_POPULOUS, pce_populous_device)
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DECLARE_DEVICE_TYPE(PCE_ROM_SF2, pce_sf2_device)
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DECLARE_DEVICE_TYPE(PCE_ROM_TENNOKOE, pce_tennokoe_device)
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#endif // MAME_BUS_PCE_PCE_ROM_H
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@ -181,6 +181,7 @@ static const pce_slot slot_list[] =
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{ PCE_CDSYS3J, "cdsys3j" },
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{ PCE_POPULOUS, "populous" },
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{ PCE_SF2, "sf2" },
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{ PCE_TENNOKOE, "tennokoe" },
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};
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static int pce_get_pcb_id(const char *slot)
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@ -306,6 +307,8 @@ int pce_cart_slot_device::get_cart_type(const uint8_t *ROM, uint32_t len)
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if (!memcmp(ROM + 0x29d1, "VER. 3.", 7)) { type = PCE_CDSYS3J; } // JP version
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else if (!memcmp(ROM + 0x29c4, "VER. 3.", 7 )) { type = PCE_CDSYS3U; } // US version
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}
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// TODO: type for TENNOKOE, "Kei's" string at bottom?
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return type;
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}
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@ -20,7 +20,8 @@ enum
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PCE_CDSYS3J,
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PCE_CDSYS3U,
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PCE_POPULOUS,
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PCE_SF2
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PCE_SF2,
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PCE_TENNOKOE
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};
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@ -303,6 +303,7 @@ static void pce_cart(device_slot_interface &device)
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device.option_add_internal("cdsys3j", PCE_ROM_CDSYS3);
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device.option_add_internal("populous", PCE_ROM_POPULOUS);
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device.option_add_internal("sf2", PCE_ROM_SF2);
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device.option_add_internal("tennokoe", PCE_ROM_TENNOKOE);
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}
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void pce_state::pce_common(machine_config &config)
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