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mastboy: Use parallel EEPROM type for "EAROM" rather than generic NVRAM

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This commit is contained in:
AJR 2017-07-13 09:01:33 -04:00
parent 9f614cdf44
commit 50a2e15b08
1 changed files with 22 additions and 22 deletions
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44
src/mame/drivers/mastboy.cpp
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@ -19,7 +19,7 @@
This Can be converted to tilemaps very easily, but probably not worth it
Backup RAM enable / disable needs figuring out properly
EEPROM enable / disable needs figuring out properly
*/
/*
@ -439,7 +439,7 @@
#include "cpu/z180/z180.h"
#include "sound/saa1099.h"
#include "sound/msm5205.h"
#include "machine/nvram.h"
#include "machine/eeprompar.h"
#include "screen.h"
#include "speaker.h"
@ -453,7 +453,7 @@ public:
m_msm(*this, "msm"),
m_gfxdecode(*this, "gfxdecode"),
m_palette(*this, "palette"),
m_nvram(*this, "nvram") ,
m_earom(*this, "earom") ,
m_workram(*this, "workram"),
m_tileram(*this, "tileram"),
m_colram(*this, "colram") { }
@ -462,8 +462,8 @@ public:
required_device<msm5205_device> m_msm;
required_device<gfxdecode_device> m_gfxdecode;
required_device<palette_device> m_palette;
required_device<eeprom_parallel_28xx_device> m_earom;
required_shared_ptr<uint8_t> m_nvram;
required_shared_ptr<uint8_t> m_workram;
required_shared_ptr<uint8_t> m_tileram;
required_shared_ptr<uint8_t> m_colram;
@ -471,7 +471,7 @@ public:
uint8_t* m_vram;
uint8_t m_bank;
int m_irq0_ack;
int m_backupram_enabled;
int m_earom_enabled;
int m_m5205_next;
int m_m5205_part;
int m_m5205_sambit0;
@ -480,9 +480,9 @@ public:
DECLARE_READ8_MEMBER(banked_ram_r);
DECLARE_WRITE8_MEMBER(banked_ram_w);
DECLARE_WRITE8_MEMBER(bank_w);
DECLARE_READ8_MEMBER(backupram_r);
DECLARE_WRITE8_MEMBER(backupram_w);
DECLARE_WRITE8_MEMBER(backupram_enable_w);
DECLARE_READ8_MEMBER(earom_r);
DECLARE_WRITE8_MEMBER(earom_w);
DECLARE_WRITE8_MEMBER(earom_enable_w);
DECLARE_WRITE8_MEMBER(msm5205_sambit0_w);
DECLARE_WRITE8_MEMBER(msm5205_sambit1_w);
DECLARE_WRITE8_MEMBER(msm5205_data_w);
@ -627,30 +627,30 @@ WRITE8_MEMBER(mastboy_state::bank_w)
m_bank = data;
}
/* Backup RAM access */
// EAROM (28C16 parallel EEPROM) access
READ8_MEMBER(mastboy_state::backupram_r)
READ8_MEMBER(mastboy_state::earom_r)
{
return m_nvram[offset];
return m_earom->read(space, offset);
}
WRITE8_MEMBER(mastboy_state::backupram_w)
WRITE8_MEMBER(mastboy_state::earom_w)
{
// if (m_backupram_enabled)
// if (m_earom_enabled)
// {
m_nvram[offset] = data;
m_earom->write(space, offset, data);
// }
// else
// {
// logerror("Write to BackupRAM when disabled! %04x, %02x\n", offset,data);
// logerror("Write to EAROM when disabled! %04x, %02x\n", offset,data);
// }
}
WRITE8_MEMBER(mastboy_state::backupram_enable_w)
WRITE8_MEMBER(mastboy_state::earom_enable_w)
{
/* This is some kind of enable / disable control for backup ram (see Charles's notes) but I'm not
/* This is some kind of enable / disable control for backup memory (see Charles's notes) but I'm not
sure how it works in practice, if we use it then it writes a lot of data with it disabled */
m_backupram_enabled = data&1;
m_earom_enabled = data&1;
}
/* MSM5205 Related */
@ -723,7 +723,7 @@ static ADDRESS_MAP_START( mastboy_map, AS_PROGRAM, 8, mastboy_state )
AM_RANGE(0xc000, 0xffff) AM_READWRITE(banked_ram_r,banked_ram_w) // mastboy bank area read / write
AM_RANGE(0xff000, 0xff7ff) AM_READWRITE(backupram_r,backupram_w) AM_SHARE("nvram")
AM_RANGE(0xff000, 0xff7ff) AM_READWRITE(earom_r, earom_w)
AM_RANGE(0xff800, 0xff807) AM_READ_PORT("P1")
AM_RANGE(0xff808, 0xff80f) AM_READ_PORT("P2")
@ -737,7 +737,7 @@ static ADDRESS_MAP_START( mastboy_map, AS_PROGRAM, 8, mastboy_state )
AM_RANGE(0xff839, 0xff839) AM_WRITE(msm5205_sambit0_w)
AM_RANGE(0xff83a, 0xff83a) AM_WRITE(msm5205_sambit1_w)
AM_RANGE(0xff83b, 0xff83b) AM_WRITE(msm5205_reset_w)
AM_RANGE(0xff83c, 0xff83c) AM_WRITE(backupram_enable_w)
AM_RANGE(0xff83c, 0xff83c) AM_WRITE(earom_enable_w)
AM_RANGE(0xffc00, 0xfffff) AM_RAM // Internal RAM
ADDRESS_MAP_END
@ -883,7 +883,7 @@ void mastboy_state::machine_start()
save_item(NAME(m_bank));
save_item(NAME(m_irq0_ack));
save_item(NAME(m_backupram_enabled));
save_item(NAME(m_earom_enabled));
save_item(NAME(m_m5205_next));
save_item(NAME(m_m5205_part));
save_item(NAME(m_m5205_sambit0));
@ -911,7 +911,7 @@ static MACHINE_CONFIG_START( mastboy )
MCFG_CPU_IO_MAP(mastboy_io_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", mastboy_state, interrupt)
MCFG_NVRAM_ADD_1FILL("nvram")
MCFG_EEPROM_2816_ADD("earom")
/* video hardware */