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author MetalliC <0vetal0@gmail.com>2020-07-25 02:59:28 +0300
committer MetalliC <0vetal0@gmail.com>2020-07-25 02:59:28 +0300
commitcd02b2f1fd880b1cd6b74a6b013ee5a3826745dc (patch)
treef27baf1006fe926c5d1572d2c25b3b6a69838e13 /src/devices/bus
parentd0159e9f7bbedbfc81d0d539dc379d5aaa4de7b5 (diff)
bus/spectrum: add common printer interfaces: ZX Lprint, ZX Lprint III, Kempston Centronics E Interface ('flat' and 'upright' models)
Diffstat (limited to 'src/devices/bus')
-rw-r--r--src/devices/bus/spectrum/exp.cpp7
-rw-r--r--src/devices/bus/spectrum/lprint.cpp454
-rw-r--r--src/devices/bus/spectrum/lprint.h157
3 files changed, 617 insertions, 1 deletions
diff --git a/src/devices/bus/spectrum/exp.cpp b/src/devices/bus/spectrum/exp.cpp
index 9d01db00b1f..264ff55beb2 100644
--- a/src/devices/bus/spectrum/exp.cpp
+++ b/src/devices/bus/spectrum/exp.cpp
@@ -163,13 +163,14 @@ void spectrum_expansion_slot_device::mreq_w(offs_t offset, uint8_t data)
#include "fuller.h"
#include "kempjoy.h"
#include "kempdisc.h"
+#include "logitek.h"
+#include "lprint.h"
#include "melodik.h"
#include "mface.h"
#include "mgt.h"
#include "mikroplus.h"
#include "opus.h"
#include "plus2test.h"
-#include "logitek.h"
#include "protek.h"
#include "sdi.h"
#include "sixword.h"
@@ -199,6 +200,10 @@ void spectrum_expansion_devices(device_slot_interface &device)
device.option_add("fuller", SPECTRUM_FULLER);
device.option_add("kempjoy", SPECTRUM_KEMPJOY);
device.option_add("kempdisc", SPECTRUM_KEMPDISC);
+ device.option_add("kempcentref", SPECTRUM_KEMPCENTREF);
+ device.option_add("kempcentreu", SPECTRUM_KEMPCENTREU);
+ device.option_add("lprint", SPECTRUM_LPRINT);
+ device.option_add("lprint3", SPECTRUM_LPRINT3);
device.option_add("melodik", SPECTRUM_MELODIK);
device.option_add("mface1", SPECTRUM_MFACE1);
device.option_add("mface128", SPECTRUM_MFACE128);
diff --git a/src/devices/bus/spectrum/lprint.cpp b/src/devices/bus/spectrum/lprint.cpp
new file mode 100644
index 00000000000..093c38cbac4
--- /dev/null
+++ b/src/devices/bus/spectrum/lprint.cpp
@@ -0,0 +1,454 @@
+// license:BSD-3-Clause
+// copyright-holders:MetalliC
+/*********************************************************************
+
+ Common printer interfaces
+
+ ZX Lprint
+ (c) 1983 Euroelectronics (UK)
+
+ ZX Lprint III
+ (c) 1984 Euroelectronics (UK)
+ Centronics and RS232 interface, most common printer interface for ZX-Spectrum.
+
+ (TODO) Kempston Centronics S Interface
+ (c) 1983 Kempston Micro Electronics Ltd (UK)
+ ROM-less device, require printer driver to be loaded from tape.
+
+ Kempston Centronics E Interface
+ (c) 1984 Kempston Micro Electronics Ltd (UK)
+
+ Notes/TODOs:
+ - add information and docs
+
+*********************************************************************/
+
+#include "emu.h"
+#include "lprint.h"
+#include <algorithm>
+
+
+/***************************************************************************
+ DEVICE DEFINITIONS
+***************************************************************************/
+
+DEFINE_DEVICE_TYPE(SPECTRUM_LPRINT, spectrum_lprint_device, "spectrum_lprint", "ZX Lprint")
+DEFINE_DEVICE_TYPE(SPECTRUM_LPRINT3, spectrum_lprint3_device, "spectrum_lprint3", "ZX Lprint III")
+DEFINE_DEVICE_TYPE(SPECTRUM_KEMPCENTREF, spectrum_kempcentre_device, "spectrum_kempcentref", "Kempston Centronics E (flat)")
+DEFINE_DEVICE_TYPE(SPECTRUM_KEMPCENTREU, spectrum_kempcentreu_device, "spectrum_kempcentreu", "Kempston Centronics E (upright)")
+
+//-------------------------------------------------
+// ROMs
+//-------------------------------------------------
+
+ROM_START(lprint)
+ ROM_REGION(0x800, "rom", 0)
+ ROM_LOAD("lprint.rom", 0x0000, 0x0800, CRC(3c3483e5) SHA1(3e4c7ecd8c3eb011cdf75eb23faf8d8ea8329757)) // permanently overlay 0x0800-0x0fff ROM area
+ROM_END
+
+ROM_START(lprint3)
+ ROM_REGION(0x800, "rom", 0)
+ ROM_DEFAULT_BIOS("v2")
+
+ // original
+ ROM_SYSTEM_BIOS(0, "v1", "v1.0")
+ ROMX_LOAD("v10.rom", 0x0000, 0x0800, CRC(a5014f40) SHA1(fe823a8b87a8bdacb14aac848bc7fe946f76faae), ROM_BIOS(0))
+ ROM_SYSTEM_BIOS(1, "v2", "v2.0")
+ ROMX_LOAD("v20.rom", 0x0000, 0x0800, CRC(b8f9a58d) SHA1(4966664badbed44ddb1c1a2ca01bdef60f0a30f8), ROM_BIOS(1))
+
+ // clones
+ ROM_SYSTEM_BIOS(2, "kp", "Sandy") // from Sandy Disco V3 (Kempston Disc clone) lower PCB, also have joystick port and passthru connector
+ ROMX_LOAD("sandy.rom", 0x0000, 0x0800, CRC(77e752f2) SHA1(11f44c5e743a413e8bc0d07c4249f36d2c0a172a), ROM_BIOS(2))
+ ROM_SYSTEM_BIOS(3, "rus", "Art East Computers (RU)") // added support for popular Soviet and Eastern Block made printers
+ ROMX_LOAD("himak.rom", 0x0000, 0x0800, CRC(b1f15976) SHA1(d9c0297c05e8092fb7e0198f4172d3d4e6ed252c), ROM_BIOS(3))
+ROM_END
+
+ROM_START(kempcentref)
+ ROM_REGION(0x800, "rom", 0)
+ ROM_LOAD("kemp-e.rom", 0x0000, 0x0800, CRC(a58b1e97) SHA1(b26e9f720a215019b8710a4a094d6fde6ecae5fd))
+ROM_END
+
+ROM_START(kempcentreu)
+ ROM_REGION(0x800, "rom", 0)
+ ROM_LOAD("7f.rom", 0x0000, 0x0800, CRC(b67a416d) SHA1(6d0772e81cfd9bc994b1c91d4e01b45e0fc0d3d3)) // scrambled
+ROM_END
+
+//-------------------------------------------------
+// device_add_mconfig - add device configuration
+//-------------------------------------------------
+
+void spectrum_lprint_device::device_add_mconfig(machine_config &config)
+{
+ CENTRONICS(config, m_centronics, centronics_devices, "printer");
+ m_centronics->busy_handler().set(FUNC(spectrum_lprint_device::busy_w));
+}
+
+void spectrum_lprint3_device::device_add_mconfig(machine_config &config)
+{
+ CENTRONICS(config, m_centronics, centronics_devices, "printer");
+ m_centronics->busy_handler().set(FUNC(spectrum_lprint3_device::busy_w));
+
+ RS232_PORT(config, m_rs232, default_rs232_devices, nullptr);
+
+ // passthru
+ // this is not really accurate, original ZX-Lprint boards had no passthru connector, but only some of clones
+ // TODO: populate expansion port only for devices which really had it
+ SPECTRUM_EXPANSION_SLOT(config, m_exp, spectrum_expansion_devices, nullptr);
+ m_exp->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
+ m_exp->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
+}
+
+void spectrum_kempcentre_device::device_add_mconfig(machine_config &config)
+{
+ CENTRONICS(config, m_centronics, centronics_devices, "printer");
+ m_centronics->busy_handler().set(FUNC(spectrum_kempcentre_device::busy_w));
+}
+
+const tiny_rom_entry *spectrum_lprint_device::device_rom_region() const
+{
+ return ROM_NAME(lprint);
+}
+
+const tiny_rom_entry *spectrum_lprint3_device::device_rom_region() const
+{
+ return ROM_NAME(lprint3);
+}
+
+const tiny_rom_entry *spectrum_kempcentre_device::device_rom_region() const
+{
+ return ROM_NAME(kempcentref);
+}
+
+const tiny_rom_entry *spectrum_kempcentreu_device::device_rom_region() const
+{
+ return ROM_NAME(kempcentreu);
+}
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// spectrum_lprint_device - constructors
+//-------------------------------------------------
+
+spectrum_lprint_device::spectrum_lprint_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, SPECTRUM_LPRINT, tag, owner, clock)
+ , device_spectrum_expansion_interface(mconfig, *this)
+ , m_rom(*this, "rom")
+ , m_centronics(*this, "centronics")
+{
+}
+
+spectrum_lprint3_device::spectrum_lprint3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, SPECTRUM_LPRINT3, tag, owner, clock)
+ , device_spectrum_expansion_interface(mconfig, *this)
+ , m_rom(*this, "rom")
+ , m_centronics(*this, "centronics")
+ , m_rs232(*this, "rs232")
+ , m_exp(*this, "exp")
+{
+}
+
+spectrum_kempcentre_device::spectrum_kempcentre_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+ : device_t(mconfig, type, tag, owner, clock)
+ , device_spectrum_expansion_interface(mconfig, *this)
+ , m_rom(*this, "rom")
+ , m_centronics(*this, "centronics")
+{
+}
+
+spectrum_kempcentre_device::spectrum_kempcentre_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : spectrum_kempcentre_device(mconfig, SPECTRUM_KEMPCENTREF, tag, owner, clock)
+{
+}
+
+spectrum_kempcentreu_device::spectrum_kempcentreu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+ : spectrum_kempcentre_device(mconfig, SPECTRUM_KEMPCENTREU, tag, owner, clock)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void spectrum_lprint_device::device_start()
+{
+ m_busy = 0;
+ save_item(NAME(m_romcs));
+ save_item(NAME(m_busy));
+}
+
+void spectrum_lprint3_device::device_start()
+{
+ m_busy = 0;
+ save_item(NAME(m_romcs));
+ save_item(NAME(m_busy));
+}
+
+void spectrum_kempcentre_device::device_start()
+{
+ m_busy = 0;
+ save_item(NAME(m_active));
+ save_item(NAME(m_romcs));
+ save_item(NAME(m_busy));
+}
+
+//-------------------------------------------------
+// device_reset - device-specific reset
+//-------------------------------------------------
+
+void spectrum_lprint_device::device_reset()
+{
+ m_romcs = 0;
+ m_centronics->write_strobe(1);
+}
+
+void spectrum_lprint3_device::device_reset()
+{
+ m_romcs = 0;
+ m_centronics->write_strobe(1);
+}
+
+void spectrum_kempcentre_device::device_reset()
+{
+ m_active = 0;
+ m_romcs = 0;
+ m_centronics->write_strobe(1);
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION (lprint)
+//**************************************************************************
+
+READ_LINE_MEMBER(spectrum_lprint_device::romcs)
+{
+ return m_romcs;
+}
+
+void spectrum_lprint_device::pre_opcode_fetch(offs_t offset)
+{
+ if (!machine().side_effects_disabled())
+ m_romcs = offset >= 0x0800 && offset < 0x1000;
+}
+
+void spectrum_lprint_device::pre_data_fetch(offs_t offset)
+{
+ if (!machine().side_effects_disabled())
+ m_romcs = offset >= 0x0800 && offset < 0x1000;
+}
+
+uint8_t spectrum_lprint_device::mreq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (m_romcs)
+ data = m_rom->base()[offset & 0x7ff];
+
+ return data;
+}
+
+uint8_t spectrum_lprint_device::iorq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (!BIT(offset, 2))
+ {
+ // code check this like - if (value & 0xe0) == 0x40, bit 6 probably /BUSY
+ data &= ~0xe0;
+ data |= !m_busy << 6;
+ }
+
+ return data;
+}
+
+void spectrum_lprint_device::iorq_w(offs_t offset, uint8_t data)
+{
+ if (!BIT(offset, 2))
+ {
+ m_centronics->write_data0(BIT(data, 0));
+ m_centronics->write_data1(BIT(data, 1));
+ m_centronics->write_data2(BIT(data, 2));
+ m_centronics->write_data3(BIT(data, 3));
+ m_centronics->write_data4(BIT(data, 4));
+ m_centronics->write_data5(BIT(data, 5));
+ m_centronics->write_data6(BIT(data, 6));
+ m_centronics->write_data7(BIT(data, 7));
+ m_centronics->write_strobe(1); // strobe probably fired automatically
+ m_centronics->write_strobe(0);
+ m_centronics->write_strobe(1);
+ }
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION (lprint3)
+//**************************************************************************
+
+READ_LINE_MEMBER(spectrum_lprint3_device::romcs)
+{
+ return m_romcs | m_exp->romcs();
+}
+
+uint8_t spectrum_lprint3_device::iorq_r(offs_t offset)
+{
+ uint8_t data = m_exp->iorq_r(offset);
+
+ if (!BIT(offset, 2))
+ {
+ if (!machine().side_effects_disabled())
+ m_romcs = BIT(offset, 7);
+ data &= ~0xc0;
+ data |= !m_rs232->dsr_r() << 6;
+ data |= m_busy << 7;
+ }
+
+ return data;
+}
+
+void spectrum_lprint3_device::iorq_w(offs_t offset, uint8_t data)
+{
+ if (!BIT(offset, 2))
+ {
+ m_centronics->write_data0(BIT(data, 0));
+ m_centronics->write_data1(BIT(data, 1));
+ m_centronics->write_data2(BIT(data, 2));
+ m_centronics->write_data3(BIT(data, 3));
+ m_centronics->write_data4(BIT(data, 4));
+ m_centronics->write_data5(BIT(data, 5));
+ m_centronics->write_data6(BIT(data, 6));
+ m_centronics->write_data7(BIT(data, 7));
+ m_centronics->write_strobe(BIT(offset, 7));
+ m_rs232->write_txd(!BIT(data, 7));
+ }
+
+ m_exp->iorq_w(offset, data);
+}
+
+uint8_t spectrum_lprint3_device::mreq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (m_romcs)
+ data = m_rom->base()[offset & 0x7ff];
+
+ if (m_exp->romcs())
+ data &= m_exp->mreq_r(offset);
+
+ return data;
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION (kempcentre)
+//**************************************************************************
+
+READ_LINE_MEMBER(spectrum_kempcentre_device::romcs)
+{
+ return m_romcs;
+}
+
+void spectrum_kempcentre_device::pre_opcode_fetch(offs_t offset)
+{
+ if (!machine().side_effects_disabled())
+ m_romcs = m_active && offset >= 0x0800 && offset < 0x1000;
+}
+
+void spectrum_kempcentre_device::pre_data_fetch(offs_t offset)
+{
+ if (!machine().side_effects_disabled())
+ m_romcs = m_active && offset >= 0x0800 && offset < 0x1000;
+}
+
+uint8_t spectrum_kempcentre_device::iorq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (!BIT(offset, 2)) // earlier version ? uses same paging as Lprint III
+ {
+ if (!machine().side_effects_disabled())
+ m_active = BIT(offset, 7);
+ }
+
+ if ((offset & 0xf0) == 0xb0) // BB or BF, actual address decode is not known
+ {
+ data &= ~0xc0;
+ data |= m_busy << 6;
+ }
+
+ return data;
+}
+
+void spectrum_kempcentre_device::iorq_w(offs_t offset, uint8_t data)
+{
+ if ((offset & 0xf0) == 0xb0) // BB or BF, actual address decode is not known
+ {
+ m_centronics->write_data0(BIT(data, 0));
+ m_centronics->write_data1(BIT(data, 1));
+ m_centronics->write_data2(BIT(data, 2));
+ m_centronics->write_data3(BIT(data, 3));
+ m_centronics->write_data4(BIT(data, 4));
+ m_centronics->write_data5(BIT(data, 5));
+ m_centronics->write_data6(BIT(data, 6));
+ m_centronics->write_data7(BIT(data, 7));
+ m_centronics->write_strobe(BIT(offset, 2));
+ }
+}
+
+uint8_t spectrum_kempcentre_device::mreq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if (m_romcs)
+ data = m_rom->base()[offset & 0x7ff];
+
+ return data;
+}
+
+
+//**************************************************************************
+// IMPLEMENTATION (kempcentreu)
+//**************************************************************************
+
+void spectrum_kempcentreu_device::device_start()
+{
+ // descramble ROM
+ std::vector<uint8_t> temp(m_rom->bytes());
+ std::copy_n(m_rom->base(), m_rom->bytes(), &temp[0]);
+ for (int i = 0; i < m_rom->bytes(); i++)
+ {
+ uint16_t addr = bitswap<11>(i, 10, 1, 0, 3, 7, 2, 6, 5, 4, 8, 9);
+ m_rom->base()[i] = bitswap<8>(temp[addr], 4, 5, 0, 1, 6, 7, 2, 3);
+ }
+ spectrum_kempcentre_device::device_start();
+}
+
+void spectrum_kempcentreu_device::pre_opcode_fetch(offs_t offset)
+{
+ if (!machine().side_effects_disabled())
+ {
+ if (offset == 0x09F4 || offset == 0x0eb4) // later version ? paged at PRINT and COPY routines
+ m_active = 1;
+
+ m_romcs = m_active && offset >= 0x0800 && offset < 0x1000;
+ }
+}
+
+uint8_t spectrum_kempcentreu_device::iorq_r(offs_t offset)
+{
+ uint8_t data = 0xff;
+
+ if ((offset & 0xf0) == 0xb0) // BB or BF, actual address decode is not known
+ {
+ if (!machine().side_effects_disabled())
+ m_active = !BIT(offset, 2);
+ data &= ~0xc0;
+ data |= m_busy << 6;
+ //data |= something_centronics << 7; // wired to centronics port, but connected to GND via wire-mod
+ }
+
+ return data;
+}
diff --git a/src/devices/bus/spectrum/lprint.h b/src/devices/bus/spectrum/lprint.h
new file mode 100644
index 00000000000..814b9ae9c62
--- /dev/null
+++ b/src/devices/bus/spectrum/lprint.h
@@ -0,0 +1,157 @@
+// license:BSD-3-Clause
+// copyright-holders:MetalliC
+/*********************************************************************
+
+ Common printer interfaces
+
+*********************************************************************/
+#ifndef MAME_BUS_SPECTRUM_LPRINT_H
+#define MAME_BUS_SPECTRUM_LPRINT_H
+
+#include "exp.h"
+#include "bus/centronics/ctronics.h"
+#include "bus/rs232/rs232.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class spectrum_lprint_device :
+ public device_t,
+ public device_spectrum_expansion_interface
+
+{
+public:
+ // construction/destruction
+ spectrum_lprint_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ virtual void pre_opcode_fetch(offs_t offset) override;
+ virtual void pre_data_fetch(offs_t offset) override;
+ virtual uint8_t mreq_r(offs_t offset) override;
+ virtual uint8_t iorq_r(offs_t offset) override;
+ virtual void iorq_w(offs_t offset, uint8_t data) override;
+ virtual DECLARE_READ_LINE_MEMBER(romcs) override;
+
+ DECLARE_WRITE_LINE_MEMBER(busy_w) { m_busy = state; };
+
+ required_memory_region m_rom;
+ required_device<centronics_device> m_centronics;
+
+ int m_romcs;
+ int m_busy;
+};
+
+class spectrum_lprint3_device :
+ public device_t,
+ public device_spectrum_expansion_interface
+
+{
+public:
+ // construction/destruction
+ spectrum_lprint3_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ virtual uint8_t mreq_r(offs_t offset) override;
+ virtual uint8_t iorq_r(offs_t offset) override;
+ virtual void iorq_w(offs_t offset, uint8_t data) override;
+ virtual DECLARE_READ_LINE_MEMBER(romcs) override;
+
+ // passthru
+ virtual void pre_opcode_fetch(offs_t offset) override { m_exp->pre_opcode_fetch(offset); };
+ virtual void post_opcode_fetch(offs_t offset) override { m_exp->post_opcode_fetch(offset); };
+ virtual void pre_data_fetch(offs_t offset) override { m_exp->pre_data_fetch(offset); };
+ virtual void post_data_fetch(offs_t offset) override { m_exp->post_data_fetch(offset); };
+ virtual void mreq_w(offs_t offset, uint8_t data) override { if (m_exp->romcs()) m_exp->mreq_w(offset, data); }
+
+ DECLARE_WRITE_LINE_MEMBER(busy_w) { m_busy = state; };
+
+ required_memory_region m_rom;
+ required_device<centronics_device> m_centronics;
+ required_device<rs232_port_device> m_rs232;
+ required_device<spectrum_expansion_slot_device> m_exp;
+
+ int m_romcs;
+ int m_busy;
+};
+
+class spectrum_kempcentre_device :
+ public device_t,
+ public device_spectrum_expansion_interface
+
+{
+public:
+ // construction/destruction
+ spectrum_kempcentre_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+ spectrum_kempcentre_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ // device-level overrides
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual const tiny_rom_entry *device_rom_region() const override;
+
+ virtual void pre_opcode_fetch(offs_t offset) override;
+ virtual void pre_data_fetch(offs_t offset) override;
+ virtual uint8_t mreq_r(offs_t offset) override;
+ virtual uint8_t iorq_r(offs_t offset) override;
+ virtual void iorq_w(offs_t offset, uint8_t data) override;
+ virtual DECLARE_READ_LINE_MEMBER(romcs) override;
+
+ DECLARE_WRITE_LINE_MEMBER(busy_w) { m_busy = state; };
+
+ required_memory_region m_rom;
+ required_device<centronics_device> m_centronics;
+
+ int m_active;
+ int m_romcs;
+ int m_busy;
+};
+
+class spectrum_kempcentreu_device :
+ public spectrum_kempcentre_device
+{
+public:
+ // construction/destruction
+ spectrum_kempcentreu_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 const tiny_rom_entry *device_rom_region() const override;
+
+ virtual void pre_opcode_fetch(offs_t offset) override;
+ virtual uint8_t iorq_r(offs_t offset) override;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(SPECTRUM_LPRINT, spectrum_lprint_device)
+DECLARE_DEVICE_TYPE(SPECTRUM_LPRINT3, spectrum_lprint3_device)
+DECLARE_DEVICE_TYPE(SPECTRUM_KEMPCENTREF, spectrum_kempcentre_device)
+DECLARE_DEVICE_TYPE(SPECTRUM_KEMPCENTREU, spectrum_kempcentreu_device)
+
+
+#endif // MAME_BUS_SPECTRUM_LPRINT_H