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https://github.com/holub/mame
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amstrad/nc: Rewrite driver
- Use memory views for banking - Simplify IRQ handling - Simplify power off handling - Replace custom PCMCIA hookup with MAME standard - Combine screen_update for all variants and update LCD colors - Add support for the NC200 floppy drive - Hook up RS232 ports - Split drivers into regional variants with matching keyboard - Support changing battery state - Add support for save states New working systems ------------------- NC100 (Sweden) [CPCWiki]
This commit is contained in:
Dirk Best
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@ -1,212 +0,0 @@
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// license:GPL-2.0+
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// copyright-holders:Wilbert Pol, Kevin Thacker
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/*****************************************************************************
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*
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* includes/nc.h
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*
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****************************************************************************/
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#ifndef MAME_AMSTRAD_NC_H
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#define MAME_AMSTRAD_NC_H
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#pragma once
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#include "bus/centronics/ctronics.h"
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#include "machine/upd765.h" // for NC200 disk drive interface
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#include "machine/i8251.h"
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#include "machine/clock.h"
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#include "machine/ram.h"
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#include "machine/nvram.h"
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#include "machine/timer.h"
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#include "sound/beep.h"
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#include "emupal.h"
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#include "bus/generic/slot.h"
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#include "bus/generic/carts.h"
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#define NC_NUM_COLOURS 4
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#define NC_SCREEN_WIDTH 480
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#define NC_SCREEN_HEIGHT 64
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#define NC200_SCREEN_WIDTH 480
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#define NC200_SCREEN_HEIGHT 128
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#define NC200_NUM_COLOURS 4
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class nc_state : public driver_device
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{
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public:
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enum nc_type
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{
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NC_TYPE_1xx, // nc100/nc150
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NC_TYPE_200 // nc200
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};
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nc_state(const machine_config &mconfig, device_type type, const char *tag, nc_type variant) :
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driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_ram(*this, RAM_TAG),
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m_beeper1(*this, "beep.1"),
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m_beeper2(*this, "beep.2"),
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m_centronics(*this, "centronics"),
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m_card(*this, "cardslot"),
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m_uart(*this, "uart"),
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m_uart_clock(*this, "uart_clock"),
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m_nvram(*this, "nvram"),
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m_fdc(*this, "upd765"),
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m_bankhandler_r(*this, "bank%u", 1U),
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m_bankhandler_w(*this, "bank%u", 5U),
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m_nc_type(variant)
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{
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}
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void nc_base(machine_config &config);
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void init_nc();
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protected:
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uint8_t nc_memory_management_r(offs_t offset);
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void nc_memory_management_w(offs_t offset, uint8_t data);
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void nc_irq_mask_w(uint8_t data);
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void nc_irq_status_w(uint8_t data);
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uint8_t nc_irq_status_r();
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uint8_t nc_key_data_in_r(offs_t offset);
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void nc_sound_w(offs_t offset, uint8_t data);
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void nc_uart_control_w(uint8_t data);
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void nc100_display_memory_start_w(uint8_t data);
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void nc_colours(palette_device &palette) const;
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TIMER_CALLBACK_MEMBER(nc_keyboard_timer_callback);
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TIMER_DEVICE_CALLBACK_MEMBER(dummy_timer_callback);
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DECLARE_WRITE_LINE_MEMBER(write_uart_clock);
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DECLARE_WRITE_LINE_MEMBER(write_centronics_busy);
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DECLARE_DEVICE_IMAGE_LOAD_MEMBER( load_pcmcia_card );
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DECLARE_DEVICE_IMAGE_UNLOAD_MEMBER( unload_pcmcia_card );
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virtual void machine_start() override;
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virtual void machine_reset() override;
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virtual void video_start() override;
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void nc_map(address_map &map);
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uint32_t screen_update_nc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int height, int width, int const (&pens)[2]);
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void nc_update_interrupts();
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private:
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int card_calculate_mask(int size);
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void set_card_present_state(int state);
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void nc_refresh_memory_bank_config(int bank);
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void nc_refresh_memory_config();
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void nc_sound_update(int channel);
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protected: // HACK FOR MC6845
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required_device<cpu_device> m_maincpu;
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required_device<ram_device> m_ram;
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required_device<beep_device> m_beeper1;
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required_device<beep_device> m_beeper2;
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required_device<centronics_device> m_centronics;
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required_device<generic_slot_device> m_card;
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required_device<i8251_device> m_uart;
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required_device<clock_device> m_uart_clock;
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required_device<nvram_device> m_nvram;
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optional_device<upd765a_device> m_fdc;
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required_memory_bank_array<4> m_bankhandler_r, m_bankhandler_w;
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char m_memory_config[4]{};
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emu_timer *m_keyboard_timer = nullptr;
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int m_membank_rom_mask = 0;
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int m_membank_internal_ram_mask = 0;
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uint8_t m_poweroff_control = 0;
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int m_card_status = 0;
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unsigned char m_uart_control = 0;
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int m_irq_mask = 0;
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int m_irq_status = 0;
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int m_irq_latch = 0;
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int m_irq_latch_mask = 0;
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int m_sound_channel_periods[2]{};
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int m_previous_inputport_10_state = 0;
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int m_previous_alarm_state = 0;
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memory_region *m_card_ram = nullptr;
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int m_membank_card_ram_mask = 0;
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int m_card_size = 0;
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unsigned long m_display_memory_start = 0;
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const nc_type m_nc_type;
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int m_centronics_ack = 0;
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int m_centronics_busy = 0;
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};
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class nc100_state : public nc_state
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{
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public:
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nc100_state(const machine_config &mconfig, device_type type, const char *tag) :
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nc_state(mconfig, type, tag, NC_TYPE_1xx)
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{
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}
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void nc100(machine_config &config);
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protected:
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void nc100_uart_control_w(uint8_t data);
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void nc100_poweroff_control_w(uint8_t data);
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uint8_t nc100_card_battery_status_r();
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void nc100_memory_card_wait_state_w(uint8_t data);
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DECLARE_WRITE_LINE_MEMBER(nc100_tc8521_alarm_callback);
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DECLARE_WRITE_LINE_MEMBER(nc100_txrdy_callback);
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DECLARE_WRITE_LINE_MEMBER(nc100_rxrdy_callback);
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DECLARE_WRITE_LINE_MEMBER(write_nc100_centronics_ack);
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virtual void machine_reset() override;
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void nc100_io(address_map &map);
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uint32_t screen_update_nc100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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};
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class nc200_state : public nc_state
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{
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public:
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nc200_state(const machine_config &mconfig, device_type type, const char *tag) :
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nc_state(mconfig, type, tag, NC_TYPE_200)
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{
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}
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void nc200(machine_config &config);
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protected:
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void nc200_irq_status_w(uint8_t data);
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uint8_t nc200_card_battery_status_r();
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uint8_t nc200_printer_status_r();
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void nc200_uart_control_w(uint8_t data);
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void nc200_memory_card_wait_state_w(uint8_t data);
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void nc200_poweroff_control_w(uint8_t data);
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[[maybe_unused]] void nc200_display_memory_start_w(uint8_t data);
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DECLARE_WRITE_LINE_MEMBER(write_nc200_centronics_ack);
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DECLARE_WRITE_LINE_MEMBER(nc200_txrdy_callback);
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DECLARE_WRITE_LINE_MEMBER(nc200_rxrdy_callback);
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DECLARE_WRITE_LINE_MEMBER(nc200_fdc_interrupt);
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[[maybe_unused]] void nc200_floppy_drive_index_callback(int drive_id);
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virtual void machine_reset() override;
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uint32_t screen_update_nc200(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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void nc200_io(address_map &map);
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private:
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void nc200_video_set_backlight(int state);
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void nc200_refresh_uart_interrupt();
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uint8_t m_nc200_uart_interrupt_irq = 0;
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int m_nc200_backlight = 0;
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};
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#endif // MAME_AMSTRAD_NC_H
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@ -1,87 +0,0 @@
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// license:GPL-2.0+
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// copyright-holders:Wilbert Pol, Kevin Thacker
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/***************************************************************************
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nc.c
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***************************************************************************/
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#include "emu.h"
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#include "nc.h"
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#include "machine/i8251.h"
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/*************************************************************************************************/
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/* PCMCIA Ram Card management */
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/* the data is stored as a simple memory dump, there is no header or other information */
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/* stores size of actual file on filesystem */
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/* this is not a real register, it is used to record card status */
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/* ==0, card not inserted, !=0 card is inserted */
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// set pcmcia card present state
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void nc_state::set_card_present_state(int state)
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{
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m_card_status = state;
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}
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// this mask will prevent overwrites from end of data
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int nc_state::card_calculate_mask(int size)
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{
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/* memory block is visible as 16k blocks */
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/* mask can only operate on power of two sizes */
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/* memory cards normally in power of two sizes */
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/* maximum of 64 16k blocks can be accessed using memory paging of nc computer */
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/* max card size is therefore 1mb */
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for (int i = 14; i < 20; i++)
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{
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if (size < (1 << i))
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return 0x03f >> (19 - i);
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}
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return 0x03f;
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}
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// load pcmcia card data
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DEVICE_IMAGE_LOAD_MEMBER( nc_state::load_pcmcia_card )
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{
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uint32_t size = m_card->common_get_size("rom");
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m_card->rom_alloc(size, GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE);
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m_card->common_load_rom(m_card->get_rom_base(), size, "rom");
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set_card_present_state(1);
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m_membank_card_ram_mask = card_calculate_mask(size);
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return image_init_result::PASS;
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}
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// save pcmcia card data back
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DEVICE_IMAGE_UNLOAD_MEMBER( nc_state::unload_pcmcia_card )
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{
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// if there is no data to write, quit
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if (!m_card_size)
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return;
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logerror("attempting card save\n");
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// write data
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image.fwrite(m_card_ram, m_card_size);
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logerror("write succeeded!\r\n");
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// set card not present state
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set_card_present_state(0);
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m_card_size = 0;
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}
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void nc_state::init_nc()
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{
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// set card not present state
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set_card_present_state(0);
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m_card_size = 0;
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}
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@ -1,95 +0,0 @@
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// license:GPL-2.0+
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// copyright-holders:Wilbert Pol, Kevin Thacker
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/***************************************************************************
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nc.c
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Functions to emulate the video hardware of the Amstrad PCW.
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***************************************************************************/
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#include "emu.h"
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#include "nc.h"
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#include "machine/ram.h"
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/***************************************************************************
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Start the video hardware emulation.
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***************************************************************************/
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void nc_state::video_start()
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{
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}
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#if 0
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/* two colours */
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static const unsigned short nc_colour_table[NC_NUM_COLOURS] =
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{
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0, 1,2,3
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};
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#endif
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/* black/white */
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static const rgb_t nc_palette[NC_NUM_COLOURS] =
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{
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rgb_t(0x060, 0x060, 0x060),
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rgb_t(0x000, 0x000, 0x000),
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rgb_t(0x080, 0x0a0, 0x060),
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rgb_t(0x000, 0x000, 0x000)
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};
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/* Initialise the palette */
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void nc_state::nc_colours(palette_device &palette) const
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{
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palette.set_pen_colors(0, nc_palette);
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}
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void nc200_state::nc200_video_set_backlight(int state)
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{
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m_nc200_backlight = state;
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}
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/***************************************************************************
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Draw the game screen in the given bitmap_ind16.
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Do NOT call osd_update_display() from this function,
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it will be called by the main emulation engine.
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***************************************************************************/
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uint32_t nc_state::screen_update_nc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int height, int width, int const (&pens)[2])
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{
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for (int y = 0; y < height; y++)
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{
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/* 64 bytes per line */
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char const *line_ptr = ((char const *)m_ram->pointer()) + m_display_memory_start + (y<<6);
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for (int x = 0, by = 0; by < (width >> 3); by++)
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{
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unsigned char byte = line_ptr[0];
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for (int b = 0; b < 8; b++)
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{
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bitmap.pix(y, x) = pens[(byte>>7) & 0x01];
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byte = byte<<1;
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x++;
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}
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line_ptr++;
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}
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}
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return 0;
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}
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uint32_t nc100_state::screen_update_nc100(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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int const pens[]{ 2, 3 };
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return screen_update_nc(screen, bitmap, cliprect, NC_SCREEN_HEIGHT, NC_SCREEN_WIDTH, pens);
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}
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uint32_t nc200_state::screen_update_nc200(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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int const pens[]{ m_nc200_backlight ? 2 : 0, m_nc200_backlight ? 3 : 1 };
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return screen_update_nc(screen, bitmap, cliprect, NC200_SCREEN_HEIGHT, NC200_SCREEN_WIDTH, pens);
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}
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@ -688,10 +688,14 @@ gx4000 // Amstrad GX4000 - 1990
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kccomp // VEB KC compact
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@source:amstrad/nc.cpp
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dw225 //
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nc100 // 1992 NC100
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nc150 // 1992 NC150
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nc200 // 1993 NC200
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nc100 // 1992 Amstrad
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nc100de // 1992 Amstrad
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nc100dk // 1992 Amstrad
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nc100sv // 1992 Amstrad
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dw225 // 1992 NTS
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nc150fr // 1992 Amstrad
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nc150it // 1992 Amstrad
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nc200 // 1993 Amstrad
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@source:amstrad/pc1512.cpp
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pc1512 //
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