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-rw-r--r--src/mame/drivers/dps1.cpp238
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diff --git a/src/mame/drivers/dps1.cpp b/src/mame/drivers/dps1.cpp
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--- a/src/mame/drivers/dps1.cpp
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-// license:BSD-3-Clause
-// copyright-holders:Miodrag Milanovic, Robbbert
-/****************************************************************************************************************
-
-Ithaca Intersystems DPS-1
-
-The last commercial release of a computer fitted with a front panel.
-
-It needs to boot from floppy before anything appears on screen.
-
-ToDo:
-- Need artwork of the front panel switches and LEDs, and port FF.
-
-***************************************************************************************************************/
-
-#include "emu.h"
-#include "cpu/z80/z80.h"
-#include "imagedev/floppy.h"
-#include "machine/am9519.h"
-#include "machine/upd765.h"
-#include "machine/mc2661.h"
-#include "bus/rs232/rs232.h"
-//#include "bus/s100/s100.h"
-#include "softlist.h"
-
-class dps1_state : public driver_device
-{
-public:
- dps1_state(const machine_config &mconfig, device_type type, const char *tag)
- : driver_device(mconfig, type, tag)
- , m_maincpu(*this, "maincpu")
- , m_fdc(*this, "fdc")
- , m_floppy0(*this, "fdc:0")
- //, m_floppy1(*this, "fdc:1")
- { }
-
- void dps1(machine_config &config);
-
- void init_dps1();
-
-protected:
- virtual void machine_reset() override;
-
-private:
- DECLARE_WRITE8_MEMBER(portb2_w);
- DECLARE_WRITE8_MEMBER(portb4_w);
- DECLARE_WRITE8_MEMBER(portb6_w);
- DECLARE_WRITE8_MEMBER(portb8_w);
- DECLARE_WRITE8_MEMBER(portba_w);
- DECLARE_WRITE8_MEMBER(portbc_w);
- DECLARE_WRITE8_MEMBER(portbe_w);
- DECLARE_READ8_MEMBER(portff_r);
- DECLARE_WRITE8_MEMBER(portff_w);
- DECLARE_WRITE_LINE_MEMBER(fdc_drq_w);
-
- void io_map(address_map &map);
- void mem_map(address_map &map);
- bool m_dma_dir;
- uint16_t m_dma_adr;
- required_device<cpu_device> m_maincpu;
- required_device<upd765_family_device> m_fdc;
- required_device<floppy_connector> m_floppy0;
- //required_device<floppy_connector> m_floppy1;
-};
-
-void dps1_state::mem_map(address_map &map)
-{
- map(0x0000, 0x03ff).bankr("bankr0").bankw("bankw0");
- map(0x0400, 0xffff).ram();
-}
-
-void dps1_state::io_map(address_map &map)
-{
- map.global_mask(0xff);
- map.unmap_value_high();
- map(0x00, 0x03).rw("uart", FUNC(mc2661_device::read), FUNC(mc2661_device::write)); // S2651
- map(0xb0, 0xb1).m(m_fdc, FUNC(upd765_family_device::map));
- map(0xb2, 0xb3).w(FUNC(dps1_state::portb2_w)); // set dma fdc->memory
- map(0xb4, 0xb5).w(FUNC(dps1_state::portb4_w)); // set dma memory->fdc
- map(0xb6, 0xb7).w(FUNC(dps1_state::portb6_w)); // enable eprom
- map(0xb8, 0xb9).w(FUNC(dps1_state::portb8_w)); // set A16-23
- map(0xba, 0xbb).w(FUNC(dps1_state::portba_w)); // set A8-15
- map(0xbc, 0xbd).w(FUNC(dps1_state::portbc_w)); // set A0-7
- map(0xbe, 0xbf).w(FUNC(dps1_state::portbe_w)); // disable eprom
- map(0xff, 0xff).rw(FUNC(dps1_state::portff_r), FUNC(dps1_state::portff_w));
- // other allocated ports, optional
- // map(0x04, 0x07).rw("uart2", FUNC(mc2661_device::read), FUNC(mc2661_device::write)); // S2651
- // map(0x08, 0x0b) parallel ports
- // map(0x10, 0x11) // interrupt response
- map(0x14, 0x14).rw("am9519a", FUNC(am9519_device::data_r), FUNC(am9519_device::data_w));
- map(0x15, 0x15).rw("am9519a", FUNC(am9519_device::stat_r), FUNC(am9519_device::cmd_w));
- map(0x16, 0x16).rw("am9519b", FUNC(am9519_device::data_r), FUNC(am9519_device::data_w));
- map(0x17, 0x17).rw("am9519b", FUNC(am9519_device::stat_r), FUNC(am9519_device::cmd_w));
- // map(0x18, 0x1f) control lines 0 to 7
- map(0xe0, 0xe3).noprw(); //unknown device
-}
-
-
-// read from disk, to memory
-WRITE8_MEMBER( dps1_state::portb2_w )
-{
- m_dma_dir = 1;
-}
-
-// write to disk, from memory
-WRITE8_MEMBER( dps1_state::portb4_w )
-{
- m_dma_dir = 0;
-}
-
-// enable eprom
-WRITE8_MEMBER( dps1_state::portb6_w )
-{
- membank("bankr0")->set_entry(1); // point at rom
-}
-
-// set A16-23
-WRITE8_MEMBER( dps1_state::portb8_w )
-{
-}
-
-// set A8-15
-WRITE8_MEMBER( dps1_state::portba_w )
-{
- m_dma_adr = (data << 8) | (m_dma_adr & 0xff);
-}
-
-// set A0-7
-WRITE8_MEMBER( dps1_state::portbc_w )
-{
- m_dma_adr = (m_dma_adr & 0xff00) | data;
-}
-
-// disable eprom
-WRITE8_MEMBER( dps1_state::portbe_w )
-{
- membank("bankr0")->set_entry(0); // point at ram
-}
-
-// read 8 front-panel switches
-READ8_MEMBER( dps1_state::portff_r )
-{
- return 0x0e;
-}
-
-// write to 8 leds
-WRITE8_MEMBER( dps1_state::portff_w )
-{
-}
-
-// do dma
-WRITE_LINE_MEMBER( dps1_state::fdc_drq_w )
-{
- if (state)
- {
- // acknowledge drq by taking /dack low (unsupported)
- // then depending on direction, transfer a byte
- address_space& mem = m_maincpu->space(AS_PROGRAM);
- if (m_dma_dir)
- { // disk to mem
- mem.write_byte(m_dma_adr, m_fdc->dma_r());
- }
- else
- { // mem to disk
- m_fdc->dma_w(mem.read_byte(m_dma_adr));
- }
- m_dma_adr++;
- }
- // else take /dack high (unsupported)
-}
-
-void dps1_state::machine_reset()
-{
- membank("bankr0")->set_entry(1); // point at rom
- membank("bankw0")->set_entry(0); // always write to ram
- // set fdc for 8 inch floppies
- m_fdc->set_rate(500000);
- // turn on the motor
- floppy_image_device *floppy = m_floppy0->get_device();
- m_fdc->set_floppy(floppy);
- floppy->mon_w(0);
-}
-
-void dps1_state::init_dps1()
-{
- uint8_t *main = memregion("maincpu")->base();
-
- membank("bankr0")->configure_entry(1, &main[0x0000]);
- membank("bankr0")->configure_entry(0, &main[0x0400]);
- membank("bankw0")->configure_entry(0, &main[0x0400]);
-}
-
-static INPUT_PORTS_START( dps1 )
-INPUT_PORTS_END
-
-static void floppies(device_slot_interface &device)
-{
- device.option_add("floppy0", FLOPPY_8_DSDD);
-}
-
-void dps1_state::dps1(machine_config &config)
-{
- // basic machine hardware
- Z80(config, m_maincpu, 4_MHz_XTAL);
- m_maincpu->set_addrmap(AS_PROGRAM, &dps1_state::mem_map);
- m_maincpu->set_addrmap(AS_IO, &dps1_state::io_map);
-
- /* video hardware */
- mc2661_device &uart(MC2661(config, "uart", 5.0688_MHz_XTAL)); // Signetics 2651N
- uart.txd_handler().set("rs232", FUNC(rs232_port_device::write_txd));
- uart.rts_handler().set("rs232", FUNC(rs232_port_device::write_rts));
- uart.dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr));
-
- rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal"));
- rs232.rxd_handler().set(uart, FUNC(mc2661_device::rx_w));
- rs232.dsr_handler().set(uart, FUNC(mc2661_device::dsr_w));
- rs232.cts_handler().set(uart, FUNC(mc2661_device::cts_w));
-
- AM9519(config, "am9519a", 0);
- AM9519(config, "am9519b", 0);
-
- // floppy
- UPD765A(config, m_fdc, 16_MHz_XTAL / 2, false, true);
- //m_fdc->intrq_wr_callback().set(FUNC(dps1_state::fdc_int_w)); // doesn't appear to be used
- m_fdc->drq_wr_callback().set(FUNC(dps1_state::fdc_drq_w));
- FLOPPY_CONNECTOR(config, "fdc:0", floppies, "floppy0", floppy_image_device::default_floppy_formats).enable_sound(true);
- //FLOPPY_CONNECTOR(config, "fdc:1", floppies, "floppy1", floppy_image_device::default_floppy_formats).enable_sound(true);
-
- // software lists
- SOFTWARE_LIST(config, "flop_list").set_original("dps1");
-}
-
-ROM_START( dps1 )
- ROM_REGION( 0x800, "maincpu", 0 )
- ROM_LOAD( "boot 1280", 0x000, 0x400, CRC(9c2e98fa) SHA1(78e6c9d00aa6e8f6c4d3c65984cfdf4e99434c66) ) // actually on the FDC-2 board
-ROM_END
-
-COMP( 1979, dps1, 0, 0, dps1, dps1, dps1_state, init_dps1, "Ithaca InterSystems", "DPS-1", MACHINE_NO_SOUND_HW )