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+// license:BSD-3-Clause
+// copyright-holders:Vas Crabb
+/***********************************************************************
+
+ Orange Micro Grappler/Grappler+ Printer Interface
+
+ With references to schematics from The Grappler™ Interface
+ Operators Manual (Copyright 1982 Orance Micro, Inc.) and
+ Grappler™+ Printer Interface Series Operators Manual (© Orange
+ Micro, Inc. 1982). This uses the IC locations on the "long"
+ version of the Grappler+ card - the newer "short" version of the
+ card has slightly different circuitry and completely different IC
+ locations.
+
+ 26-pin two-row header to printer:
+
+ STB 1 2 GND
+ D0 3 4 GND
+ D1 5 6 GND
+ D2 7 8 GND
+ D3 9 10 GND
+ D4 11 12 GND
+ D5 23 14 GND
+ D6 15 16 GND
+ D7 17 18 GND
+ ACK 19 20 GND
+ BUSY 21 22 GND
+ P.E. 23 24 GND
+ SLCT 25 26 GND
+
+ Orange Micro Buffered Grappler+ Printer Interface
+
+ 26-pin two-row header to printer:
+
+ STB 1 2 GND
+ D0 3 4 GND
+ D1 5 6 GND
+ D2 7 8 GND
+ D3 9 10 GND
+ D4 11 12 GND
+ D5 23 14 GND
+ D6 15 16 GND
+ D7 17 18 GND
+ ACK 19 20 GND
+ BUSY 21 22 GND
+ P.E. 23 24 GND
+ SLCT 25 26 N/C
+
+***********************************************************************/
+#ifndef MAME_BUS_A2BUS_GRAPPLERPLUS_H
+#define MAME_BUS_A2BUS_GRAPPLERPLUS_H
+
+#pragma once
+
+#include "a2bus.h"
+
+#include "bus/centronics/ctronics.h"
+#include "cpu/mcs48/mcs48.h"
+
+
+class a2bus_grappler_device_base : public device_t, public device_a2bus_card_interface
+{
+public:
+ // device_a2bus_card_interface implementation
+ virtual u8 read_c800(u16 offset) override;
+
+protected:
+ a2bus_grappler_device_base(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
+
+ // signal state
+ u8 busy_in() const { return m_busy_in; }
+ u8 pe_in() const { return m_pe_in; }
+ u8 slct_in() const { return m_slct_in; }
+
+ required_device<centronics_device> m_printer_conn;
+ required_device<output_latch_device> m_printer_out;
+ required_region_ptr<u8> m_rom;
+
+protected:
+ // device_t implementation
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual void device_start() override;
+
+ // helpers
+ void set_rom_bank(u16 rom_bank);
+
+private:
+ // printer status inputs
+ DECLARE_WRITE_LINE_MEMBER(busy_w);
+ DECLARE_WRITE_LINE_MEMBER(pe_w);
+ DECLARE_WRITE_LINE_MEMBER(slct_w);
+
+ // synchronised printer status inputs
+ void set_busy_in(void *ptr, s32 param);
+ void set_pe_in(void *ptr, s32 param);
+ void set_slct_in(void *ptr, s32 param);
+
+ u16 m_rom_bank; // U2D (pin 13)
+ u8 m_busy_in; // printer connector pin 21 (synchronised)
+ u8 m_pe_in; // printer connector pin 23 (synchronised)
+ u8 m_slct_in; // printer connector pin 25 (synchronised)
+};
+
+
+class a2bus_grappler_device : public a2bus_grappler_device_base
+{
+public:
+ a2bus_grappler_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
+
+ // device_a2bus_card_interface implementation
+ virtual u8 read_c0nx(u8 offset) override;
+ virtual void write_c0nx(u8 offset, u8 data) override;
+ virtual u8 read_cnxx(u8 offset) override;
+ virtual void write_cnxx(u8 offset, u8 data) override;
+
+protected:
+ // device_t implementation
+ virtual tiny_rom_entry const *device_rom_region() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ // printer status inputs
+ DECLARE_WRITE_LINE_MEMBER(ack_w);
+
+ // synchronised signals
+ void set_data(void *ptr, s32 param);
+ void set_strobe(void *ptr, s32 param);
+ void set_ack_in(void *ptr, s32 param);
+
+ u8 m_strobe; // U3 (pin 4)
+ u8 m_ack_latch; // U3 (pin 13)
+ u8 m_ack_in; // printer connector pin 19 (synchronised)
+};
+
+
+class a2bus_grapplerplus_device_base : public a2bus_grappler_device_base
+{
+public:
+ // DIP switch handlers
+ virtual DECLARE_INPUT_CHANGED_MEMBER(sw_msb) { }
+
+ // device_a2bus_card_interface implementation
+ virtual void write_c0nx(u8 offset, u8 data) override;
+ virtual u8 read_cnxx(u8 offset) override;
+ virtual void write_cnxx(u8 offset, u8 data) override;
+
+protected:
+ a2bus_grapplerplus_device_base(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
+
+ // device_t implementation
+ virtual ioport_constructor device_input_ports() const override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // ACK latch set input
+ DECLARE_WRITE_LINE_MEMBER(ack_w);
+
+ // signal state
+ u8 ack_latch() const { return m_ack_latch; }
+
+ required_ioport m_s1;
+
+private:
+ // synchronised printer status inputs
+ void set_ack_in(void *ptr, s32 param);
+
+ // for derived devices to implement
+ virtual void data_latched(u8 data) = 0;
+ virtual void ack_latch_set() { }
+ virtual void ack_latch_cleared() { }
+
+ u8 m_ack_latch; // U2C (pin 9)
+ u8 m_ack_in; // printer connector pin 19 (synchronised)
+};
+
+
+class a2bus_grapplerplus_device : public a2bus_grapplerplus_device_base
+{
+public:
+ a2bus_grapplerplus_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
+
+ // DIP switch handlers
+ virtual DECLARE_INPUT_CHANGED_MEMBER(sw_msb) override;
+
+ // device_a2bus_card_interface implementation
+ virtual u8 read_c0nx(u8 offset) override;
+ virtual void write_c0nx(u8 offset, u8 data) override;
+
+protected:
+ // device_t implementation
+ virtual tiny_rom_entry const *device_rom_region() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ // a2bus_grapplerplus_device_base implementation
+ virtual void data_latched(u8 data) override;
+ virtual void ack_latch_set() override;
+ virtual void ack_latch_cleared() override;
+
+ // timer handlers
+ TIMER_CALLBACK_MEMBER(update_strobe);
+
+ emu_timer * m_strobe_timer;
+
+ u8 m_data_latch; // U10
+ u8 m_irq_disable; // U2A (pin 4)
+ u8 m_irq; // U3D (pin 13)
+ u8 m_next_strobe; // U5A (pin 5)
+};
+
+
+class a2bus_buf_grapplerplus_device : public a2bus_grapplerplus_device_base
+{
+public:
+ a2bus_buf_grapplerplus_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
+
+ // device_a2bus_card_interface implementation
+ virtual u8 read_c0nx(u8 offset) override;
+
+protected:
+ a2bus_buf_grapplerplus_device(machine_config const &mconfig, device_type type, char const *tag, device_t *owner, u32 clock);
+
+ // device_t implementation
+ virtual tiny_rom_entry const *device_rom_region() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+ // helpers
+ template <typename T> void device_add_mconfig(machine_config &config, T &&mcu_clock);
+
+private:
+ // a2bus_grapplerplus_device_base implementation
+ virtual void data_latched(u8 data) override;
+
+ // printer status inputs
+ DECLARE_WRITE_LINE_MEMBER(buf_ack_w);
+
+ // MCU I/O handlers
+ void mcu_io(address_map &map);
+ void mcu_p2_w(u8 data);
+ u8 mcu_bus_r();
+ void mcu_bus_w(u8 data);
+
+ // synchronised signals
+ void set_buf_data(void *ptr, s32 param);
+ void set_buf_ack_in(void *ptr, s32 param);
+ void clear_ibusy(void *ptr, s32 param);
+
+ required_device<mcs48_cpu_device> m_mcu;
+ std::unique_ptr<u8 []> m_ram;
+
+ u16 m_ram_row; // U1-U8
+ u8 m_ram_mask; // mask out chips that are not installed
+ u8 m_mcu_p2; // U10
+ u8 m_data_latch; // U14 (synchronised)
+ u8 m_ibusy; // U12
+ u8 m_buf_ack_latch; // U12
+ u8 m_buf_ack_in; // printer connector pin 19 (synchronised)
+};
+
+
+class a2bus_buf_grapplerplus_reva_device : public a2bus_buf_grapplerplus_device
+{
+public:
+ a2bus_buf_grapplerplus_reva_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
+
+protected:
+ // device_t implementation
+ virtual void device_add_mconfig(machine_config &config) override;
+};
+
+
+DECLARE_DEVICE_TYPE(A2BUS_GRAPPLER, a2bus_grappler_device)
+DECLARE_DEVICE_TYPE(A2BUS_GRAPPLERPLUS, a2bus_grapplerplus_device)
+DECLARE_DEVICE_TYPE(A2BUS_BUFGRAPPLERPLUS, a2bus_buf_grapplerplus_device)
+DECLARE_DEVICE_TYPE(A2BUS_BUFGRAPPLERPLUSA, a2bus_buf_grapplerplus_reva_device)
+
+#endif // MAME_BUS_A2BUS_GRAPPLERPLUS_H