summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices
diff options
context:
space:
mode:
authorGravatarGravatar Nigel Barnes <Pernod70@users.noreply.github.com>2019-11-11 18:44:47 +0000
committerGravatarGravatar Nigel Barnes <Pernod70@users.noreply.github.com>2019-11-11 18:45:26 +0000
commit68bfd84495602d0836c4188e5abeef5766d3c62b (patch)
treea80290836b97d98063cab55f8317cdad499bd4cd /src/devices
parent63561e2c2c64d1fc3376fcd7d54051068e39b5f7 (diff)
bbcb: Added Morley Electronics RAM Disc and PMS 64K Non-Volatile Ram Module devices.
Diffstat (limited to 'src/devices')
-rw-r--r--src/devices/bus/bbc/1mhzbus/1mhzbus.cpp9
-rw-r--r--src/devices/bus/bbc/1mhzbus/pms64k.cpp80
-rw-r--r--src/devices/bus/bbc/1mhzbus/pms64k.h51
-rw-r--r--src/devices/bus/bbc/1mhzbus/ramdisc.cpp203
-rw-r--r--src/devices/bus/bbc/1mhzbus/ramdisc.h60
5 files changed, 400 insertions, 3 deletions
diff --git a/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp b/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp
index 65b7b265bde..50edb6e5506 100644
--- a/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp
+++ b/src/devices/bus/bbc/1mhzbus/1mhzbus.cpp
@@ -118,7 +118,8 @@ void bbc_1mhzbus_slot_device::jim_w(offs_t offset, uint8_t data)
//#include "scsi.h"
//#include "multiform.h"
#include "opus3.h"
-//#include "ramdisc.h"
+#include "pms64k.h"
+#include "ramdisc.h"
//#include "graduate.h"
#include "beebsid.h"
//#include "prisma3.h"
@@ -141,7 +142,8 @@ void bbc_1mhzbus_devices(device_slot_interface &device)
//device.option_add("twdd", BBC_TWDD); /* Technomatic Winchester (Akhter Host Adaptor + ABD4070 */
//device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */
device.option_add("opus3", BBC_OPUS3); /* Opus Challenger 3 */
- //device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
+ device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
+ device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
//device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */
device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */
//device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */
@@ -165,7 +167,8 @@ void bbcm_1mhzbus_devices(device_slot_interface &device)
//device.option_add("m87", BBC_M87); /* Peartree Music 87 Synthesiser */
//device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */
device.option_add("opusa", BBC_OPUSA); /* Opus Challenger ADFS */
- //device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
+ device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
+ device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
//device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */
device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */
//device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */
diff --git a/src/devices/bus/bbc/1mhzbus/pms64k.cpp b/src/devices/bus/bbc/1mhzbus/pms64k.cpp
new file mode 100644
index 00000000000..0c975b39f48
--- /dev/null
+++ b/src/devices/bus/bbc/1mhzbus/pms64k.cpp
@@ -0,0 +1,80 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ PMS 64K Non-Volatile Ram Module
+
+ TODO:
+ - Find accompanying software, needed to install utilities to RAM.
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "pms64k.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_PMS64K, bbc_pms64k_device, "bbc_pms64k", "PMS 64K Non-Volatile Ram Module");
+
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_pms64k_device::device_add_mconfig(machine_config &config)
+{
+ NVRAM(config, "nvram", nvram_device::DEFAULT_NONE);
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_pms64k_device - constructor
+//-------------------------------------------------
+
+bbc_pms64k_device::bbc_pms64k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, BBC_PMS64K, tag, owner, clock)
+ , device_bbc_1mhzbus_interface(mconfig, *this)
+ , m_nvram(*this, "nvram")
+ , m_ram_page(0)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_pms64k_device::device_start()
+{
+ m_ram = std::make_unique<uint8_t[]>(0x10000);
+ m_nvram->set_base(m_ram.get(), 0x10000);
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+void bbc_pms64k_device::fred_w(offs_t offset, uint8_t data)
+{
+ if (offset == 0xff)
+ {
+ m_ram_page = data;
+ }
+}
+
+uint8_t bbc_pms64k_device::jim_r(offs_t offset)
+{
+ return m_ram[(m_ram_page << 8) | offset];
+}
+
+void bbc_pms64k_device::jim_w(offs_t offset, uint8_t data)
+{
+ m_ram[(m_ram_page << 8) | offset] = data;
+}
diff --git a/src/devices/bus/bbc/1mhzbus/pms64k.h b/src/devices/bus/bbc/1mhzbus/pms64k.h
new file mode 100644
index 00000000000..8b817b7db1d
--- /dev/null
+++ b/src/devices/bus/bbc/1mhzbus/pms64k.h
@@ -0,0 +1,51 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ PMS 64K Non-Volatile Ram Module
+
+**********************************************************************/
+
+
+#ifndef MAME_BUS_BBC_1MHZBUS_PMS64K_H
+#define MAME_BUS_BBC_1MHZBUS_PMS64K_H
+
+#include "1mhzbus.h"
+#include "machine/nvram.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class bbc_pms64k_device:
+ public device_t,
+ public device_bbc_1mhzbus_interface
+{
+public:
+ // construction/destruction
+ bbc_pms64k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ virtual void fred_w(offs_t offset, uint8_t data) override;
+ virtual uint8_t jim_r(offs_t offset) override;
+ virtual void jim_w(offs_t offset, uint8_t data) override;
+
+private:
+ required_device<nvram_device> m_nvram;
+ std::unique_ptr<uint8_t[]> m_ram;
+
+ uint8_t m_ram_page;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(BBC_PMS64K, bbc_pms64k_device);
+
+
+#endif /* MAME_BUS_BBC_1MHZBUS_PMS64K_H */
diff --git a/src/devices/bus/bbc/1mhzbus/ramdisc.cpp b/src/devices/bus/bbc/1mhzbus/ramdisc.cpp
new file mode 100644
index 00000000000..ef3c3265dbe
--- /dev/null
+++ b/src/devices/bus/bbc/1mhzbus/ramdisc.cpp
@@ -0,0 +1,203 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Morley Electronics RAM Disc
+
+ Notes:
+ - 1MB model has 4096 sectors &0000 to &0fff
+ - 2MB model has 8192 sectors &0000 to &1fff
+
+**********************************************************************/
+
+
+#include "emu.h"
+#include "ramdisc.h"
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_RAMDISC, bbc_ramdisc_device, "bbc_ramdisc", "Morley Electronics RAM Disc");
+
+
+//-------------------------------------------------
+// INPUT_PORTS( ramdisc )
+//-------------------------------------------------
+
+static INPUT_PORTS_START(ramdisc)
+ PORT_START("POWER")
+ PORT_CONFNAME(0x01, 0x01, "Power") PORT_CHANGED_MEMBER(DEVICE_SELF, bbc_ramdisc_device, power_changed, 0)
+ PORT_CONFSETTING(0x00, DEF_STR(Off))
+ PORT_CONFSETTING(0x01, DEF_STR(On))
+INPUT_PORTS_END
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor bbc_ramdisc_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME(ramdisc);
+}
+
+//-------------------------------------------------
+// ROM( ramdisc )
+//-------------------------------------------------
+
+ROM_START(ramdisc)
+ ROM_REGION(0x4000, "exp_rom", 0)
+ ROM_LOAD("ramdisc101.rom", 0x0000, 0x4000, CRC(627568c2) SHA1(17e727998756fe35ff451fd2ce1d4b5977be24fc))
+ROM_END
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void bbc_ramdisc_device::device_add_mconfig(machine_config &config)
+{
+ /* ram disk */
+ NVRAM(config, "nvram", nvram_device::DEFAULT_NONE);
+
+ BBC_1MHZBUS_SLOT(config, m_1mhzbus, DERIVED_CLOCK(1, 1), bbc_1mhzbus_devices, nullptr);
+ m_1mhzbus->irq_handler().set(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::irq_w));
+ m_1mhzbus->nmi_handler().set(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::nmi_w));
+}
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const tiny_rom_entry *bbc_ramdisc_device::device_rom_region() const
+{
+ return ROM_NAME(ramdisc);
+}
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// bbc_ramdisc_device - constructor
+//-------------------------------------------------
+
+bbc_ramdisc_device::bbc_ramdisc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, BBC_RAMDISC, tag, owner, clock)
+ , device_bbc_1mhzbus_interface(mconfig, *this)
+ , m_1mhzbus(*this, "1mhzbus")
+ , m_nvram(*this, "nvram")
+ , m_power(*this, "POWER")
+ , m_sector(0)
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_ramdisc_device::device_start()
+{
+ /* define 2mb ram */
+ m_ram = std::make_unique<uint8_t[]>(RAM_SIZE);
+ m_nvram->set_base(m_ram.get(), RAM_SIZE);
+
+ /* register for save states */
+ save_pointer(NAME(m_ram), RAM_SIZE);
+ save_item(NAME(m_sector));
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION
+//**************************************************************************
+
+INPUT_CHANGED_MEMBER(bbc_ramdisc_device::power_changed)
+{
+ /* clear RAM on power off */
+ if (!newval)
+ {
+ memset(m_ram.get(), 0xff, RAM_SIZE);
+ }
+}
+
+uint8_t bbc_ramdisc_device::fred_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (m_power->read())
+ {
+ switch (offset)
+ {
+ case 0xc0:
+ /* sector LSB */
+ data = m_sector & 0x00ff;
+ break;
+ case 0xc2:
+ /* sector MSB */
+ data = (m_sector & 0xff00) >> 8;
+ break;
+ case 0xc1:
+ case 0xc3:
+ /* TODO: unknown purpose, must return 0x3f or 0x5f */
+ data = 0x3f;
+ logerror("Read %04x -> %02x\n", offset | 0xfcc0, data);
+ break;
+ }
+ }
+
+ data &= m_1mhzbus->fred_r(offset);
+
+ return data;
+}
+
+void bbc_ramdisc_device::fred_w(offs_t offset, uint8_t data)
+{
+ if (m_power->read())
+ {
+ switch (offset)
+ {
+ case 0xc0:
+ /* sector LSB */
+ m_sector = (m_sector & 0xff00) | data;
+ break;
+ case 0xc2:
+ /* sector MSB */
+ m_sector = (m_sector & 0x00ff) | (data << 8);
+ break;
+ case 0xc1:
+ case 0xc3:
+ /* TODO: unknown purpose, always writes 0x00 or 0xff */
+ logerror("Write %04x <- %02x\n", offset | 0xfcc0, data);
+ break;
+ }
+ }
+
+ m_1mhzbus->fred_w(offset, data);
+}
+
+uint8_t bbc_ramdisc_device::jim_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ /* power on and sector < 2mb */
+ if (m_power->read() && m_sector < RAM_SIZE)
+ {
+ data &= m_ram[(m_sector << 8) | offset];
+ }
+
+ data &= m_1mhzbus->jim_r(offset);
+
+ return data;
+}
+
+void bbc_ramdisc_device::jim_w(offs_t offset, uint8_t data)
+{
+ /* power on and sector < 2mb */
+ if (m_power->read() && m_sector < RAM_SIZE)
+ {
+ m_ram[(m_sector << 8) | offset] = data;
+ }
+
+ m_1mhzbus->jim_w(offset, data);
+}
diff --git a/src/devices/bus/bbc/1mhzbus/ramdisc.h b/src/devices/bus/bbc/1mhzbus/ramdisc.h
new file mode 100644
index 00000000000..52b26284e06
--- /dev/null
+++ b/src/devices/bus/bbc/1mhzbus/ramdisc.h
@@ -0,0 +1,60 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Morley Electronics RAM Disc
+
+**********************************************************************/
+
+
+#ifndef MAME_BUS_BBC_1MHZBUS_RAMDISC_H
+#define MAME_BUS_BBC_1MHZBUS_RAMDISC_H
+
+#include "1mhzbus.h"
+#include "machine/nvram.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class bbc_ramdisc_device:
+ public device_t,
+ public device_bbc_1mhzbus_interface
+{
+public:
+ // construction/destruction
+ bbc_ramdisc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ DECLARE_INPUT_CHANGED_MEMBER(power_changed);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ virtual uint8_t fred_r(offs_t offset) override;
+ virtual void fred_w(offs_t offset, uint8_t data) override;
+ virtual uint8_t jim_r(offs_t offset) override;
+ virtual void jim_w(offs_t offset, uint8_t data) override;
+
+private:
+ static const size_t RAM_SIZE = 0x200000;
+
+ required_device<bbc_1mhzbus_slot_device> m_1mhzbus;
+ required_device<nvram_device> m_nvram;
+ required_ioport m_power;
+
+ std::unique_ptr<uint8_t[]> m_ram;
+ uint16_t m_sector;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(BBC_RAMDISC, bbc_ramdisc_device);
+
+
+#endif /* MAME_BUS_BBC_1MHZBUS_RAMDISC_H */