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https://github.com/holub/mame
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bus/bbc/1mhzbus: Added PEDL Multiform Z80.
This commit is contained in:
Nigel Barnes
parent
817caa777c
commit
24579647dc
@ -500,6 +500,8 @@ if (BUSES["BBC_1MHZBUS"]~=null) then
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/ieee488.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/m2000.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/m2000.h",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/multiform.cpp",
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MAME_DIR .. "src/devices/bus/bbc/1mhzbus/multiform.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/pdram.cpp",
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@ -119,7 +119,7 @@ void bbc_1mhzbus_slot_device::jim_w(offs_t offset, uint8_t data)
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#include "m2000.h"
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//#include "m5000.h"
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#include "scsi.h"
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//#include "multiform.h"
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#include "multiform.h"
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#include "opus3.h"
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#include "pdram.h"
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#include "pms64k.h"
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@ -146,7 +146,7 @@ void bbc_1mhzbus_devices(device_slot_interface &device)
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//device.option_add("videodig", BBC_VIDEODIG); /* Video Digitiser (RH Electronics) */
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device.option_add("emrmidi", BBC_EMRMIDI); /* EMR Midi Interface */
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//device.option_add("procyon", BBC_PROCYON); /* CST Procyon IEEE Interface */
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//device.option_add("multiform", BBC_MULTIFORM); /* Technomatic Multiform Z80 */
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device.option_add("multiform", BBC_MULTIFORM); /* PEDL Multiform Z80 */
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device.option_add("opus3", BBC_OPUS3); /* Opus Challenger 3 */
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device.option_add("pdram", BBC_PDRAM); /* Micro User Pull Down RAM */
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device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
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@ -176,7 +176,7 @@ void bbcm_1mhzbus_devices(device_slot_interface &device)
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//device.option_add("m3000", BBC_M3000); /* Hybrid Music 3000 Expander */
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//device.option_add("m5000", BBC_M5000); /* Hybrid Music 5000 Synthesiser */
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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("multiform", BBC_MULTIFORM); /* PEDL Multiform Z80 */
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device.option_add("opusa", BBC_OPUSA); /* Opus Challenger ADFS */
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device.option_add("pdram", BBC_PDRAM); /* Micro User Pull Down RAM */
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device.option_add("pms64k", BBC_PMS64K); /* PMS 64K Non-Volatile Ram Module */
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195
src/devices/bus/bbc/1mhzbus/multiform.cpp
Normal file
195
src/devices/bus/bbc/1mhzbus/multiform.cpp
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@ -0,0 +1,195 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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PEDL Multiform Z80 2nd processor
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http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Technomatic_MultiformZ80.html
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TODO:
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- Find utility disc, library disc, and manual
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**********************************************************************/
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#include "emu.h"
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#include "multiform.h"
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#include "softlist_dev.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(BBC_MULTIFORM, bbc_multiform_device, "bbc_multiform", "PEDL Multiform Z80")
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//-------------------------------------------------
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// ADDRESS_MAP( z80_mem )
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//-------------------------------------------------
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void bbc_multiform_device::z80_mem(address_map &map)
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{
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map(0x0000, 0xffff).rw(FUNC(bbc_multiform_device::mem_r), FUNC(bbc_multiform_device::mem_w));
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}
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//-------------------------------------------------
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// ADDRESS_MAP( z80_io )
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//-------------------------------------------------
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void bbc_multiform_device::z80_io(address_map &map)
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{
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map.global_mask(0xff);
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map(0x00, 0x00).r(m_host_latch[0], FUNC(generic_latch_8_device::read)).w(m_parasite_latch[0], FUNC(generic_latch_8_device::write));
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map(0x01, 0x01).r(m_host_latch[1], FUNC(generic_latch_8_device::read)).w(m_parasite_latch[1], FUNC(generic_latch_8_device::write));
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map(0x80, 0x80).w(FUNC(bbc_multiform_device::rom_disable_w));
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}
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//-------------------------------------------------
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// ROM( multiform )
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//-------------------------------------------------
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ROM_START(multiform)
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ROM_REGION(0x2000, "osm", 0)
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ROM_LOAD("osmv200.rom", 0x0000, 0x2000, CRC(67ce1713) SHA1(314ee6211a7af6cab659640fbdd11f1078460f08))
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ROM_REGION(0x4000, "exp_rom", 0)
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ROM_LOAD("osmz80v137.rom", 0x0000, 0x4000, CRC(79a8de8f) SHA1(0bc06ce54ab9a2242294bbbe9ce8f07e464bb674))
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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_multiform_device::device_add_mconfig(machine_config &config)
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{
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Z80(config, m_z80, 8_MHz_XTAL / 2);
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m_z80->set_addrmap(AS_PROGRAM, &bbc_multiform_device::z80_mem);
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m_z80->set_addrmap(AS_IO, &bbc_multiform_device::z80_io);
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m_z80->set_irq_acknowledge_callback(FUNC(bbc_multiform_device::irq_callback));
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/* 74ls374 */
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GENERIC_LATCH_8(config, m_host_latch[0]);
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GENERIC_LATCH_8(config, m_host_latch[1]);
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GENERIC_LATCH_8(config, m_parasite_latch[0]);
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GENERIC_LATCH_8(config, m_parasite_latch[1]);
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/* software lists */
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SOFTWARE_LIST(config, "flop_ls_z80").set_original("bbc_flop_z80");
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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_multiform_device::device_rom_region() const
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{
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return ROM_NAME( multiform );
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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_multiform_device - constructor
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//-------------------------------------------------
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bbc_multiform_device::bbc_multiform_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, BBC_MULTIFORM, tag, owner, clock)
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, device_bbc_1mhzbus_interface(mconfig, *this)
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, m_z80(*this, "z80")
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, m_host_latch(*this, "host_latch%u", 0U)
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, m_parasite_latch(*this, "parasite_latch%u", 0U)
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, m_osm(*this, "osm")
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, m_rom_enabled(true)
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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_multiform_device::device_start()
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{
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m_ram = std::make_unique<uint8_t[]>(0x10000);
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/* register for save states */
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save_pointer(NAME(m_ram), 0x10000);
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save_item(NAME(m_rom_enabled));
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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 bbc_multiform_device::device_reset()
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{
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m_rom_enabled = true;
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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uint8_t bbc_multiform_device::fred_r(offs_t offset)
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{
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uint8_t data = 0xff;
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switch (offset)
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{
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case 0x00:
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data = m_parasite_latch[0]->read();
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break;
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case 0x01:
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data = m_parasite_latch[1]->read();
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break;
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}
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return data;
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}
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void bbc_multiform_device::fred_w(offs_t offset, uint8_t data)
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{
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switch (offset)
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{
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case 0x00:
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m_host_latch[0]->write(data);
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break;
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case 0x01:
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m_host_latch[1]->write(data);
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break;
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}
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}
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READ8_MEMBER(bbc_multiform_device::mem_r)
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{
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uint8_t data;
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if (m_rom_enabled && offset < 0x2000)
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data = m_osm->base()[offset & 0x1fff];
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else
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data = m_ram[offset];
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return data;
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}
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WRITE8_MEMBER(bbc_multiform_device::mem_w)
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{
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m_ram[offset] = data;
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}
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WRITE8_MEMBER(bbc_multiform_device::rom_disable_w)
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{
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if (!machine().side_effects_disabled())
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m_rom_enabled = false;
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}
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//-------------------------------------------------
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// irq vector callback
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//-------------------------------------------------
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IRQ_CALLBACK_MEMBER(bbc_multiform_device::irq_callback)
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{
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return 0xfe;
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}
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69
src/devices/bus/bbc/1mhzbus/multiform.h
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69
src/devices/bus/bbc/1mhzbus/multiform.h
Normal file
@ -0,0 +1,69 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/**********************************************************************
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PEDL Multiform Z80 2nd processor
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http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Technomatic_MultiformZ80.html
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**********************************************************************/
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#ifndef MAME_BUS_BBC_1MHZBUS_MULTIFORM_H
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#define MAME_BUS_BBC_1MHZBUS_MULTIFORM_H
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#include "1mhzbus.h"
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#include "cpu/z80/z80.h"
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#include "machine/gen_latch.h"
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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// ======================> bbc_multiform_device
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class bbc_multiform_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_multiform_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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DECLARE_READ8_MEMBER( mem_r );
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DECLARE_WRITE8_MEMBER( mem_w );
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DECLARE_WRITE8_MEMBER( rom_disable_w );
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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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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) 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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private:
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IRQ_CALLBACK_MEMBER( irq_callback );
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required_device<cpu_device> m_z80;
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required_device_array<generic_latch_8_device, 2> m_host_latch;
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required_device_array<generic_latch_8_device, 2> m_parasite_latch;
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required_memory_region m_osm;
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void z80_mem(address_map &map);
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void z80_io(address_map &map);
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std::unique_ptr<uint8_t[]> m_ram;
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bool m_rom_enabled;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(BBC_MULTIFORM, bbc_multiform_device)
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#endif /* MAME_BUS_BBC_1MHZBUS_MULTIFORM_H */
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