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-rw-r--r--src/mame/drivers/cms.cpp213
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diff --git a/src/mame/drivers/cms.cpp b/src/mame/drivers/cms.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Nigel Barnes
-// thanks-to:Phill Harvey-Smith
-/***************************************************************************
-
- CMS 6502 Development System
-
- This is an industrial 6502 system in a rack chassis consisting of a
- back-plane and plug-in cards, with two 3.5" floppy disk drives, a
- "SIMON" System Monitor, DFS, and an extended version of BBC BASIC
- called MULTI-BASIC. It has an IBM-XT style keyboard.
-
- The "Eurocard" standard format cards are as follows:
- - 6502 2nd Processor For The BBC Micro (CMS0026 6502)
- - 40/80 Terminal Card (also handles the keyboard) (CMS 0010-3)
- - High Performance Colour Graphics Card (CMS Video-4)
- - Versatile Interface Board (CMS0006 Issue 4)
- - Analogue Digital Interface Board (CMS00092 A/D I/O)
- - Floppy Disk Controller
-
- System I/O Allocation
- &FA00-&FBFF Advanced graphics card
- &FC00-&FC0F CPU card VIA
- &FC10-&FC1F GDP card control register
- &FC20-&FC2F GDP card colour register
- &FC30-&FC3F Real-Time-Clock registers (EM M3002)
- &FC40-&FC4F Disc controller registers
- &FC50-&FC5F Disc controller drive select register
- &FC60-&FC6F IEEE controller card
- &FC70-&FC7F Memory select register (on CPU card)
- &FC80-&FC8F VIA1 on VIB card
- &FC90-&FC9F VIA2 on VIB card
- &FCA0-&FCAF VIA3 on VIB card
- &FCB0-&FCBF VIA4 on VIB card (Printer interface)
- &FCC0-&FCCF Analogue card ADC
- &FCD0-&FCDF Analogue card DAC
- &FCE0-&FCEF Analogue card VIA
- &FCF0-&FCFF Serial Interface on VIB card
- &FD00-&FD1F Reserved
- &FD20-&FD2F 40/80 column card video processor
- &FD30-&FD3F 40/80 column card VIA (printer interface)
- &FD40-&FD4F 40/80 column card serial interface
- &FD50-&FD5F Reserved for future I/O cards
-
-****************************************************************************/
-
-#include "emu.h"
-#include "cpu/m6502/m6502.h"
-#include "machine/6522via.h"
-#include "machine/input_merger.h"
-#include "machine/m3002.h"
-#include "bus/acorn/bus.h"
-#include "coreutil.h"
-
-
-class cms_state : public driver_device
-{
-public:
- cms_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_rom(*this, "rom")
- , m_bank1(*this, "bank1")
- , m_via(*this, "via")
- , m_irqs(*this, "irqs")
- , m_bus(*this, "bus")
- , m_map_select(0)
- { }
-
- void cms6502(machine_config &config);
-
-protected:
- virtual void machine_start() override;
- virtual void machine_reset() override;
-
-private:
- void map_select_w(uint8_t data);
- void page_select_w(uint8_t data);
- DECLARE_WRITE_LINE_MEMBER(bus_nmi_w);
-
- required_device<cpu_device> m_maincpu;
- required_memory_region m_rom;
- required_memory_bank m_bank1;
- required_device<via6522_device> m_via;
- required_device<input_merger_device> m_irqs;
- required_device<acorn_bus_device> m_bus;
-
- void cms6502_mem(address_map &map);
-
- uint8_t m_map_select;
- uint8_t m_page_select[4];
-};
-
-
-void cms_state::cms6502_mem(address_map &map)
-{
- map.unmap_value_high();
- map(0x0000, 0x7fff).ram(); /* socket M1 43256C-12 32K RAM */
- map(0x8000, 0xbfff).bankr("bank1").w(FUNC(cms_state::page_select_w));
- map(0xc000, 0xffff).rom().region("mos", 0);
- map(0xfc00, 0xfc0f).m(m_via, FUNC(via6522_device::map));
- map(0xfc30, 0xfc30).mirror(0xf).rw("rtc", FUNC(m3002_device::read), FUNC(m3002_device::write));
- map(0xfc70, 0xfc7f).w(FUNC(cms_state::map_select_w));
-}
-
-
-void cms_state::map_select_w( uint8_t data)
-{
- m_map_select = data & 0x03;
- m_bank1->set_entry((m_map_select << 2) | m_page_select[m_map_select]);
-}
-
-void cms_state::page_select_w(uint8_t data)
-{
- /* 27513 in socket M4 (map 0) */
- if (m_map_select == 0x00)
- {
- m_page_select[m_map_select] = data & 0x03;
- }
- m_bank1->set_entry((m_map_select << 2) | m_page_select[m_map_select]);
-}
-
-
-/* Input ports */
-static INPUT_PORTS_START( cms )
-INPUT_PORTS_END
-
-
-void cms_state::machine_start()
-{
- m_bank1->configure_entries(0, 16, m_rom->base(), 0x4000);
-
- /* register for save states */
- save_item(NAME(m_map_select));
- save_item(NAME(m_page_select));
-}
-
-
-void cms_state::machine_reset()
-{
- m_map_select = 0x00;
- for (int i = 0; i < 4; i++)
- {
- m_page_select[i] = 0x00;
- }
- m_bank1->set_entry(0);
-}
-
-
-WRITE_LINE_MEMBER(cms_state::bus_nmi_w)
-{
- m_maincpu->set_input_line(INPUT_LINE_NMI, state);
-}
-
-
-/***************************************************************************
- MACHINE DRIVERS
-***************************************************************************/
-
-void cms_state::cms6502(machine_config &config)
-{
- M6502(config, m_maincpu, 1_MHz_XTAL);
- m_maincpu->set_addrmap(AS_PROGRAM, &cms_state::cms6502_mem);
-
- INPUT_MERGER_ANY_HIGH(config, m_irqs).output_handler().set_inputline(m_maincpu, M6502_IRQ_LINE);
-
- MOS6522(config, m_via, 1_MHz_XTAL);
- m_via->irq_handler().set("irqs", FUNC(input_merger_device::in_w<0>));
-
- M3002(config, "rtc", 32.768_kHz_XTAL);
-
- /* 7 Slot Backplane */
- ACORN_BUS(config, m_bus, 0);
- m_bus->set_space(m_maincpu, AS_PROGRAM);
- m_bus->out_irq_callback().set(m_irqs, FUNC(input_merger_device::in_w<1>));
- m_bus->out_nmi_callback().set(FUNC(cms_state::bus_nmi_w));
- ACORN_BUS_SLOT(config, "bus1", m_bus, cms_bus_devices, "4080term");
- ACORN_BUS_SLOT(config, "bus2", m_bus, cms_bus_devices, nullptr);
- ACORN_BUS_SLOT(config, "bus3", m_bus, cms_bus_devices, "fdc");
- ACORN_BUS_SLOT(config, "bus4", m_bus, cms_bus_devices, "hires");
- ACORN_BUS_SLOT(config, "bus5", m_bus, cms_bus_devices, nullptr);
- ACORN_BUS_SLOT(config, "bus6", m_bus, cms_bus_devices, nullptr);
-}
-
-
-/***************************************************************************
- ROM definitions
-***************************************************************************/
-
-ROM_START( cms6502 )
- ROM_REGION(0x04000, "mos", 0) /* 27128 */
- ROM_LOAD("6502 system os.m5", 0x0000, 0x4000, CRC(1b6da63d) SHA1(5c0afc55288ad86e1d6e653dda9c5dcccdaf0ff2))
-
- ROM_REGION(0x40000, "rom", 0)
- /* Socket M4 27513 */
- ROM_LOAD("basic.m4", 0x00000, 0x4000, CRC(e27b6146) SHA1(ae89ee695bed6f49402f009ded16ad3a36f64c28))
- ROM_LOAD("dfs-1.4.m4", 0x04000, 0x4000, CRC(0743ddb5) SHA1(cd61956a10510a6954cba9ba17f70c2991e81d9b))
- ROM_LOAD("multi-basic.m4", 0x08000, 0x4000, CRC(fb785563) SHA1(9f97582ba0b82f314008bf95eacb00e7bced3cac))
- ROM_LOAD("simon-2.02.m4", 0x0c000, 0x4000, CRC(d1f1b633) SHA1(991c3691a70f45fff3c828c8c0a0906b9f5e34fc))
- /* Socket M3 empty */
- /* Socket M2 27128 */
- ROM_LOAD("gdp.m2", 0x20000, 0x4000, CRC(f545293b) SHA1(532c45ac4661643c6c6f633d504ef72e800cc900))
- /* Socket M1 contains RAM, not mapped as ROM */
-
- ROM_REGION(0x200, "proms", 0)
- ROM_LOAD("bassys2.ic8", 0x0000, 0x0200, CRC(417ff0b4) SHA1(878718accb83f18456fefaf67a0e4a6a407113e4)) // 512x8
-ROM_END
-
-
-/* Driver */
-
-/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */
-COMP( 1986, cms6502, 0, 0, cms6502, cms, cms_state, empty_init, "Cambridge Microprocessor Systems", "CMS 6502 Development System", MACHINE_NO_SOUND_HW )