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https://github.com/holub/mame
synced 2025-04-23 00:39:36 +03:00
Merge pull request #2969 from shattered/_b26597f
tosh1000: hook up NVRAM for CONFIG.SYS storage
This commit is contained in:
R. Belmont
GitHub
commit
bfffc50606
@ -2635,6 +2635,8 @@ files {
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MAME_DIR .. "src/mame/drivers/pcipc.cpp",
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MAME_DIR .. "src/mame/drivers/tandy1t.cpp",
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MAME_DIR .. "src/mame/drivers/tosh1000.cpp",
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MAME_DIR .. "src/mame/machine/tosh1000_bram.cpp",
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MAME_DIR .. "src/mame/machine/tosh1000_bram.h",
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MAME_DIR .. "src/mame/drivers/compc.cpp",
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MAME_DIR .. "src/mame/video/pc_t1t.cpp",
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MAME_DIR .. "src/mame/video/pc_t1t.h",
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@ -26,11 +26,12 @@
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- backup ram (stores config.sys)
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- HardRAM (static RAM board)
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- native keyboard (MCU dump missing)
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- font selector (CRTC register 0x12)
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- font selector (CRTC register 0x12; DIP switches PJ20, PJ21)
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Useful links:
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- board photo: http://s8.hostingkartinok.com/uploads/images/2016/05/579e9d152bc772d9c16bc8ac611eb97f.jpg
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- manuals: http://www.minuszerodegrees.net/manuals/Toshiba/Toshiba.htm
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- http://www.seasip.info/VintagePC/t1000.html
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***************************************************************************/
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@ -44,6 +45,7 @@
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#include "machine/bankdev.h"
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#include "machine/ram.h"
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#include "machine/rp5c01.h"
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#include "machine/tosh1000_bram.h"
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#include "softlist.h"
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@ -67,6 +69,7 @@ public:
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: driver_device(mconfig, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_bankdev(*this, "bankdev")
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, m_bram(*this, "bram")
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{ }
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DECLARE_MACHINE_RESET(tosh1000);
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@ -75,9 +78,22 @@ public:
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DECLARE_WRITE8_MEMBER(romdos_bank_w);
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DECLARE_READ8_MEMBER(romdos_bank_r);
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DECLARE_WRITE8_MEMBER(bram_w);
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DECLARE_READ8_MEMBER(bram_r);
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protected:
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required_device<cpu_device> m_maincpu;
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required_device<address_map_bank_device> m_bankdev;
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required_device<tosh1000_bram_device> m_bram;
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private:
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enum {
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IDLE, READ_DATA, WRITE_DATA
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};
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bool m_bram_latch = false;
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int m_bram_offset = 0;
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int m_bram_state = IDLE;
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};
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@ -87,6 +103,9 @@ DRIVER_INIT_MEMBER(tosh1000_state, tosh1000)
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MACHINE_RESET_MEMBER(tosh1000_state, tosh1000)
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{
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m_bram_latch = false;
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m_bram_offset = 0;
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m_bram_state = IDLE;
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m_bankdev->set_bank(8);
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}
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@ -105,6 +124,92 @@ WRITE8_MEMBER(tosh1000_state::romdos_bank_w)
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}
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}
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WRITE8_MEMBER(tosh1000_state::bram_w)
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{
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DBG_LOG(2, "BRAM", ("%02x <- %02x\n", 0xc0 + offset, data));
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switch (offset)
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{
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case 1:
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if (m_bram_latch)
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{
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DBG_LOG(1, "Backup RAM", ("%02x <- %02x\n", m_bram_offset % 160, data));
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m_bram->write(m_bram_offset % 160, data);
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m_bram_offset++;
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}
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else
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{
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if (m_bram_state == WRITE_DATA)
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{
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m_bram_latch = true;
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m_bram_offset = 0;
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}
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}
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break;
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case 3:
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switch (data & 0xc0)
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{
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case 0:
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m_bram_state = IDLE;
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break;
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case 0x40:
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m_bram_state = READ_DATA;
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break;
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case 0x80:
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m_bram_state = WRITE_DATA;
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m_bram_latch = false;
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break;
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default:
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m_bram_state = IDLE;
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break;
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}
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break;
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}
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}
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READ8_MEMBER(tosh1000_state::bram_r)
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{
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uint8_t data = 0;
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switch (offset)
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{
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case 2:
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if (m_bram_state == READ_DATA)
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{
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data = m_bram->read(m_bram_offset % 160);
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DBG_LOG(1, "BRAM", ("@ %02x == %02x\n", m_bram_offset % 160, data));
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m_bram_offset++;
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}
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break;
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case 3:
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data = 0x2c;
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switch (m_bram_state)
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{
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case IDLE:
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// bit 4 -- floppy drive disk change signal
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break;
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case READ_DATA:
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data |= 0x43; // always ready to read (and write ??)
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break;
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case WRITE_DATA:
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data |= 0x82; // always ready to write
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break;
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}
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break;
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}
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DBG_LOG(2, "BRAM", ("%02x == %02x\n", 0xc0 + offset, data));
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return data;
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}
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static ADDRESS_MAP_START( tosh1000_romdos, AS_PROGRAM, 8, tosh1000_state )
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AM_RANGE(0x00000, 0x0ffff) AM_ROM AM_REGION("romdos", 0)
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@ -126,6 +231,7 @@ ADDRESS_MAP_END
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static ADDRESS_MAP_START( tosh1000_io, AS_IO, 8, tosh1000_state )
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x0000, 0x00ff) AM_DEVICE("mb", ibm5160_mb_device, map)
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AM_RANGE(0x00c0, 0x00c3) AM_READWRITE(bram_r, bram_w)
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AM_RANGE(0x00c8, 0x00c8) AM_WRITE(romdos_bank_w) // ROM-DOS page select [p. B-15]
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AM_RANGE(0x02c0, 0x02df) AM_DEVREADWRITE("rtc", tc8521_device, read, write)
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ADDRESS_MAP_END
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@ -173,6 +279,8 @@ static MACHINE_CONFIG_START( tosh1000 )
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MCFG_RAM_ADD(RAM_TAG)
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MCFG_RAM_DEFAULT_SIZE("512K")
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MCFG_TOSH1000_BRAM_ADD("bram")
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MACHINE_CONFIG_END
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92
src/mame/machine/tosh1000_bram.cpp
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92
src/mame/machine/tosh1000_bram.cpp
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@ -0,0 +1,92 @@
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// license:BSD-3-Clause
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// copyright-holders:Sergey Svishchev
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/***************************************************************************
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Toshiba 1000 Backup RAM
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Simulation of interface provided by 80C50 keyboard controller.
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***************************************************************************/
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#include "emu.h"
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#include "tosh1000_bram.h"
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DEFINE_DEVICE_TYPE(TOSH1000_BRAM, tosh1000_bram_device, "tosh1000_bram", "Toshiba T1000 Backup RAM")
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//-------------------------------------------------
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// ctor
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//-------------------------------------------------
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tosh1000_bram_device::tosh1000_bram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, TOSH1000_BRAM, tag, owner, clock)
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, device_nvram_interface(mconfig, *this)
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{
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}
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uint8_t tosh1000_bram_device::read(int offset)
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{
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return m_bram[offset];
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}
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void tosh1000_bram_device::write(int offset, uint8_t data)
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{
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m_bram[offset] = data;
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}
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READ8_MEMBER( tosh1000_bram_device::read )
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{
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return m_bram[offset];
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}
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WRITE8_MEMBER( tosh1000_bram_device::write )
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{
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m_bram[offset] = data;
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}
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//-------------------------------------------------
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// nvram_default - called to initialize NVRAM to
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// its default state
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//-------------------------------------------------
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void tosh1000_bram_device::nvram_default()
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{
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memset(m_bram, 0x1a, BRAM_SIZE);
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}
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//-------------------------------------------------
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// nvram_read - called to read NVRAM from the
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// .nv file
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//-------------------------------------------------
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void tosh1000_bram_device::nvram_read(emu_file &file)
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{
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file.read(m_bram, BRAM_SIZE);
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}
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//-------------------------------------------------
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// nvram_write - called to write NVRAM to the
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// .nv file
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//-------------------------------------------------
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void tosh1000_bram_device::nvram_write(emu_file &file)
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{
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file.write(m_bram, BRAM_SIZE);
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void tosh1000_bram_device::device_start()
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{
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/* register for save states */
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save_item(NAME(m_bram));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void tosh1000_bram_device::device_reset()
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{
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}
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57
src/mame/machine/tosh1000_bram.h
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57
src/mame/machine/tosh1000_bram.h
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@ -0,0 +1,57 @@
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// license:BSD-3-Clause
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// copyright-holders:Sergey Svishchev
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/***************************************************************************
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Toshiba 1000 Backup RAM
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Simulation of interface provided by 80C50 keyboard controller.
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***************************************************************************/
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#ifndef __TOSH1000_BRAM_H__
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#define __TOSH1000_BRAM_H__
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/***************************************************************************
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DEVICE CONFIGURATION MACROS
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***************************************************************************/
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#define MCFG_TOSH1000_BRAM_ADD(_tag) \
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MCFG_DEVICE_ADD(_tag, TOSH1000_BRAM, 0)
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#define BRAM_SIZE 160
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// ======================> tosh1000_bram_device
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class tosh1000_bram_device : public device_t,
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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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tosh1000_bram_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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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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// device_nvram_interface overrides
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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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public:
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DECLARE_READ8_MEMBER( read );
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DECLARE_WRITE8_MEMBER( write );
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uint8_t read(int offset);
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void write(int offset, uint8_t data);
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private:
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uint8_t m_bram[BRAM_SIZE];
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};
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// device type definition
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extern const device_type TOSH1000_BRAM;
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#endif
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