mirror of
https://github.com/holub/mame
synced 2025-04-23 00:39:36 +03:00
bbcb: Added Morley Electronics RAM Disc and PMS 64K Non-Volatile Ram Module devices.
This commit is contained in:
Nigel Barnes
parent
63561e2c2c
commit
68bfd84495
@ -477,6 +477,10 @@ if (BUSES["BBC_1MHZBUS"]~=null) then
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/m2000.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/opus3.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/opus3.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/pms64k.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/pms64k.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/ramdisc.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/ramdisc.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/sprite.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/sprite.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/cfa3000opt.cpp",
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@ -118,7 +118,8 @@ void bbc_1mhzbus_slot_device::jim_w(offs_t offset, uint8_t data)
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//#include "scsi.h"
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//#include "multiform.h"
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#include "opus3.h"
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//#include "ramdisc.h"
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#include "pms64k.h"
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#include "ramdisc.h"
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//#include "graduate.h"
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#include "beebsid.h"
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//#include "prisma3.h"
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@ -141,7 +142,8 @@ void bbc_1mhzbus_devices(device_slot_interface &device)
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//device.option_add("twdd", BBC_TWDD); /* Technomatic Winchester (Akhter Host Adaptor + ABD4070 */
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//device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */
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device.option_add("opus3", BBC_OPUS3); /* Opus Challenger 3 */
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//device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
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device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
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device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
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//device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */
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device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */
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//device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */
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@ -165,7 +167,8 @@ void bbcm_1mhzbus_devices(device_slot_interface &device)
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//device.option_add("m87", BBC_M87); /* Peartree Music 87 Synthesiser */
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//device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */
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device.option_add("opusa", BBC_OPUSA); /* Opus Challenger ADFS */
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//device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
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device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
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device.option_add("ramdisc", BBC_RAMDISC); /* Morley Electronics RAM Disc */
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//device.option_add("graduate", BBC_GRADUATE); /* The Torch Graduate G400/G800 */
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device.option_add("beebsid", BBC_BEEBSID); /* BeebSID */
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//device.option_add("prisma3", BBC_PRISMA3); /* PRISMA-3 - Millipede 1989 */
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80
src/devices/bus/bbc/1mhzbus/pms64k.cpp
Normal file
80
src/devices/bus/bbc/1mhzbus/pms64k.cpp
Normal file
@ -0,0 +1,80 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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PMS 64K Non-Volatile Ram Module
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TODO:
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- Find accompanying software, needed to install utilities to RAM.
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**********************************************************************/
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#include "emu.h"
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#include "pms64k.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(BBC_PMS64K, bbc_pms64k_device, "bbc_pms64k", "PMS 64K Non-Volatile Ram Module");
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//-------------------------------------------------
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// device_add_mconfig - add device configuration
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//-------------------------------------------------
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void bbc_pms64k_device::device_add_mconfig(machine_config &config)
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{
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NVRAM(config, "nvram", nvram_device::DEFAULT_NONE);
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// bbc_pms64k_device - constructor
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//-------------------------------------------------
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bbc_pms64k_device::bbc_pms64k_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, BBC_PMS64K, tag, owner, clock)
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, device_bbc_1mhzbus_interface(mconfig, *this)
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, m_nvram(*this, "nvram")
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, m_ram_page(0)
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{
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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 bbc_pms64k_device::device_start()
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{
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m_ram = std::make_unique<uint8_t[]>(0x10000);
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m_nvram->set_base(m_ram.get(), 0x10000);
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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void bbc_pms64k_device::fred_w(offs_t offset, uint8_t data)
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{
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if (offset == 0xff)
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{
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m_ram_page = data;
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}
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}
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uint8_t bbc_pms64k_device::jim_r(offs_t offset)
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{
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return m_ram[(m_ram_page << 8) | offset];
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}
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void bbc_pms64k_device::jim_w(offs_t offset, uint8_t data)
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{
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m_ram[(m_ram_page << 8) | offset] = data;
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}
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51
src/devices/bus/bbc/1mhzbus/pms64k.h
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51
src/devices/bus/bbc/1mhzbus/pms64k.h
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@ -0,0 +1,51 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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PMS 64K Non-Volatile Ram Module
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**********************************************************************/
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#ifndef MAME_BUS_BBC_1MHZBUS_PMS64K_H
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#define MAME_BUS_BBC_1MHZBUS_PMS64K_H
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#include "1mhzbus.h"
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#include "machine/nvram.h"
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class bbc_pms64k_device:
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public device_t,
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public device_bbc_1mhzbus_interface
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{
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public:
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// construction/destruction
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bbc_pms64k_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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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual void fred_w(offs_t offset, uint8_t data) override;
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virtual uint8_t jim_r(offs_t offset) override;
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virtual void jim_w(offs_t offset, uint8_t data) override;
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private:
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required_device<nvram_device> m_nvram;
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std::unique_ptr<uint8_t[]> m_ram;
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uint8_t m_ram_page;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(BBC_PMS64K, bbc_pms64k_device);
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#endif /* MAME_BUS_BBC_1MHZBUS_PMS64K_H */
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203
src/devices/bus/bbc/1mhzbus/ramdisc.cpp
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203
src/devices/bus/bbc/1mhzbus/ramdisc.cpp
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@ -0,0 +1,203 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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Morley Electronics RAM Disc
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Notes:
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- 1MB model has 4096 sectors &0000 to &0fff
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- 2MB model has 8192 sectors &0000 to &1fff
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**********************************************************************/
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#include "emu.h"
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#include "ramdisc.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(BBC_RAMDISC, bbc_ramdisc_device, "bbc_ramdisc", "Morley Electronics RAM Disc");
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//-------------------------------------------------
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// INPUT_PORTS( ramdisc )
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//-------------------------------------------------
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static INPUT_PORTS_START(ramdisc)
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PORT_START("POWER")
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PORT_CONFNAME(0x01, 0x01, "Power") PORT_CHANGED_MEMBER(DEVICE_SELF, bbc_ramdisc_device, power_changed, 0)
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PORT_CONFSETTING(0x00, DEF_STR(Off))
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PORT_CONFSETTING(0x01, DEF_STR(On))
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INPUT_PORTS_END
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//-------------------------------------------------
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// input_ports - device-specific input ports
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//-------------------------------------------------
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ioport_constructor bbc_ramdisc_device::device_input_ports() const
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{
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return INPUT_PORTS_NAME(ramdisc);
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}
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//-------------------------------------------------
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// ROM( ramdisc )
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//-------------------------------------------------
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ROM_START(ramdisc)
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ROM_REGION(0x4000, "exp_rom", 0)
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ROM_LOAD("ramdisc101.rom", 0x0000, 0x4000, CRC(627568c2) SHA1(17e727998756fe35ff451fd2ce1d4b5977be24fc))
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ROM_END
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//-------------------------------------------------
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// device_add_mconfig - add device configuration
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//-------------------------------------------------
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void bbc_ramdisc_device::device_add_mconfig(machine_config &config)
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{
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/* ram disk */
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NVRAM(config, "nvram", nvram_device::DEFAULT_NONE);
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BBC_1MHZBUS_SLOT(config, m_1mhzbus, DERIVED_CLOCK(1, 1), bbc_1mhzbus_devices, nullptr);
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m_1mhzbus->irq_handler().set(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::irq_w));
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m_1mhzbus->nmi_handler().set(m_1mhzbus, FUNC(bbc_1mhzbus_slot_device::nmi_w));
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}
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//-------------------------------------------------
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// rom_region - device-specific ROM region
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//-------------------------------------------------
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const tiny_rom_entry *bbc_ramdisc_device::device_rom_region() const
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{
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return ROM_NAME(ramdisc);
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// bbc_ramdisc_device - constructor
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//-------------------------------------------------
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bbc_ramdisc_device::bbc_ramdisc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, BBC_RAMDISC, tag, owner, clock)
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, device_bbc_1mhzbus_interface(mconfig, *this)
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, m_1mhzbus(*this, "1mhzbus")
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, m_nvram(*this, "nvram")
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, m_power(*this, "POWER")
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, m_sector(0)
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{
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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 bbc_ramdisc_device::device_start()
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{
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/* define 2mb ram */
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m_ram = std::make_unique<uint8_t[]>(RAM_SIZE);
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m_nvram->set_base(m_ram.get(), RAM_SIZE);
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/* register for save states */
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save_pointer(NAME(m_ram), RAM_SIZE);
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save_item(NAME(m_sector));
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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INPUT_CHANGED_MEMBER(bbc_ramdisc_device::power_changed)
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{
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/* clear RAM on power off */
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if (!newval)
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{
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memset(m_ram.get(), 0xff, RAM_SIZE);
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}
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}
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uint8_t bbc_ramdisc_device::fred_r(offs_t offset)
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{
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uint8_t data = 0xff;
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if (m_power->read())
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{
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switch (offset)
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{
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case 0xc0:
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/* sector LSB */
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data = m_sector & 0x00ff;
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break;
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case 0xc2:
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/* sector MSB */
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data = (m_sector & 0xff00) >> 8;
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break;
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case 0xc1:
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case 0xc3:
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/* TODO: unknown purpose, must return 0x3f or 0x5f */
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data = 0x3f;
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logerror("Read %04x -> %02x\n", offset | 0xfcc0, data);
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break;
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}
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}
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data &= m_1mhzbus->fred_r(offset);
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return data;
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}
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void bbc_ramdisc_device::fred_w(offs_t offset, uint8_t data)
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{
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if (m_power->read())
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{
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switch (offset)
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{
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case 0xc0:
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/* sector LSB */
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m_sector = (m_sector & 0xff00) | data;
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break;
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case 0xc2:
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/* sector MSB */
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m_sector = (m_sector & 0x00ff) | (data << 8);
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break;
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case 0xc1:
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case 0xc3:
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/* TODO: unknown purpose, always writes 0x00 or 0xff */
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logerror("Write %04x <- %02x\n", offset | 0xfcc0, data);
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break;
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}
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}
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m_1mhzbus->fred_w(offset, data);
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}
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uint8_t bbc_ramdisc_device::jim_r(offs_t offset)
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{
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uint8_t data = 0xff;
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/* power on and sector < 2mb */
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if (m_power->read() && m_sector < RAM_SIZE)
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{
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data &= m_ram[(m_sector << 8) | offset];
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}
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data &= m_1mhzbus->jim_r(offset);
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return data;
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}
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void bbc_ramdisc_device::jim_w(offs_t offset, uint8_t data)
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{
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/* power on and sector < 2mb */
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if (m_power->read() && m_sector < RAM_SIZE)
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{
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m_ram[(m_sector << 8) | offset] = data;
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}
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m_1mhzbus->jim_w(offset, data);
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}
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60
src/devices/bus/bbc/1mhzbus/ramdisc.h
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60
src/devices/bus/bbc/1mhzbus/ramdisc.h
Normal file
@ -0,0 +1,60 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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Morley Electronics RAM Disc
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**********************************************************************/
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#ifndef MAME_BUS_BBC_1MHZBUS_RAMDISC_H
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#define MAME_BUS_BBC_1MHZBUS_RAMDISC_H
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#include "1mhzbus.h"
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#include "machine/nvram.h"
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class bbc_ramdisc_device:
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public device_t,
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public device_bbc_1mhzbus_interface
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{
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public:
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// construction/destruction
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bbc_ramdisc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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DECLARE_INPUT_CHANGED_MEMBER(power_changed);
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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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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual ioport_constructor device_input_ports() const override;
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virtual const tiny_rom_entry *device_rom_region() const override;
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virtual uint8_t fred_r(offs_t offset) override;
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virtual void fred_w(offs_t offset, uint8_t data) override;
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virtual uint8_t jim_r(offs_t offset) override;
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virtual void jim_w(offs_t offset, uint8_t data) override;
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private:
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static const size_t RAM_SIZE = 0x200000;
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required_device<bbc_1mhzbus_slot_device> m_1mhzbus;
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required_device<nvram_device> m_nvram;
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required_ioport m_power;
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std::unique_ptr<uint8_t[]> m_ram;
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uint16_t m_sector;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(BBC_RAMDISC, bbc_ramdisc_device);
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#endif /* MAME_BUS_BBC_1MHZBUS_RAMDISC_H */
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