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mame/src/mame/includes/bbc.h

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// license:BSD-3-Clause
// copyright-holders:Gordon Jefferyes, Nigel Barnes
/*****************************************************************************
*
* BBC Model B/B+/Master/Compact
*
* Driver by Gordon Jefferyes <mess_bbc@romvault.com>
*
****************************************************************************/
#ifndef MAME_INCLUDES_BBC_H
#define MAME_INCLUDES_BBC_H
#pragma once
#include "cpu/m6502/m6502.h"
#include "cpu/m6502/m65sc02.h"
#include "imagedev/floppy.h"
#include "machine/74259.h"
#include "machine/6522via.h"
#include "machine/6850acia.h"
#include "machine/clock.h"
#include "machine/mc6854.h"
#include "machine/ram.h"
#include "machine/wd_fdc.h"
#include "machine/upd7002.h"
#include "machine/mc146818.h"
#include "machine/i2cmem.h"
#include "machine/bankdev.h"
#include "machine/input_merger.h"
#include "video/mc6845.h"
#include "video/saa5050.h"
#include "sound/sn76496.h"
#include "sound/tms5220.h"
#include "sound/samples.h"
#include "imagedev/cassette.h"
#include "bus/rs232/rs232.h"
#include "bus/centronics/ctronics.h"
#include "bus/econet/econet.h"
#include "bus/bbc/rom/slot.h"
#include "bus/bbc/fdc/fdc.h"
#include "bus/bbc/analogue/analogue.h"
#include "bus/bbc/1mhzbus/1mhzbus.h"
#include "bus/bbc/modem/modem.h"
#include "bus/bbc/internal/internal.h"
#include "bus/bbc/tube/tube.h"
#include "bus/bbc/userport/userport.h"
#include "bus/bbc/exp/exp.h"
#include "bus/bbc/joyport/joyport.h"
#include "bus/bbc/cart/slot.h"
#include "emupal.h"
#include "screen.h"
class bbc_state : public driver_device
{
public:
bbc_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_maincpu(*this, "maincpu")
, m_ram(*this, RAM_TAG)
, m_hd6845(*this, "hd6845")
, m_screen(*this, "screen")
, m_irqs(*this, "irqs")
, m_palette(*this, "palette")
, m_adlc(*this, "mc6854")
, m_sn(*this, "sn76489")
, m_samples(*this, "samples")
, m_keyboard(*this, "COL%u", 0)
, m_trom(*this, "saa5050")
, m_tms(*this, "tms5220")
, m_cassette(*this, "cassette")
, m_acia(*this, "acia6850")
, m_acia_clock(*this, "acia_clock")
, m_latch(*this, "latch")
, m_rs232(*this, "rs423")
, m_via6522_0(*this, "via6522_0")
, m_via6522_1(*this, "via6522_1")
, m_upd7002(*this, "upd7002")
, m_analog(*this, "analogue")
, m_joyport(*this, "joyport")
, m_tube(*this, "tube")
, m_intube(*this, "intube")
, m_extube(*this, "extube")
, m_1mhzbus(*this, "1mhzbus")
, m_modem(*this, "modem")
, m_userport(*this, "userport")
, m_internal(*this, "internal")
, m_exp(*this, "exp")
, m_rtc(*this, "rtc")
, m_i2cmem(*this, "i2cmem")
, m_fdc(*this, "fdc")
, m_wd_fdc(*this, "wd_fdc")
, m_rom(*this, "romslot%u", 0U)
, m_cart(*this, "cartslot%u", 1U)
, m_region_mos(*this, "mos")
, m_region_swr(*this, "swr")
, m_bank1(*this, "bank1")
, m_bank2(*this, "bank2")
, m_bankdev(*this, "bankdev")
, m_bbcconfig(*this, "BBCCONFIG")
{ }
enum class monitor_type
{
COLOUR,
BLACKWHITE,
GREEN,
AMBER
};
DECLARE_FLOPPY_FORMATS(floppy_formats);
uint8_t bbc_ram_r(offs_t offset);
void bbc_ram_w(offs_t offset, uint8_t data);
uint8_t bbc_romsel_r(offs_t offset);
void bbc_romsel_w(offs_t offset, uint8_t data);
uint8_t bbc_paged_r(offs_t offset);
void bbc_paged_w(offs_t offset, uint8_t data);
uint8_t bbc_mos_r(offs_t offset);
void bbc_mos_w(offs_t offset, uint8_t data);
uint8_t bbc_fred_r(offs_t offset);
void bbc_fred_w(offs_t offset, uint8_t data);
uint8_t bbc_jim_r(offs_t offset);
void bbc_jim_w(offs_t offset, uint8_t data);
uint8_t bbcbp_fetch_r(offs_t offset);
void bbcbp_romsel_w(offs_t offset, uint8_t data);
uint8_t bbcbp_paged_r(offs_t offset);
void bbcbp_paged_w(offs_t offset, uint8_t data);
uint8_t bbcm_fetch_r(offs_t offset);
uint8_t bbcm_acccon_r();
void bbcm_acccon_w(uint8_t data);
void bbcm_romsel_w(offs_t offset, uint8_t data);
uint8_t bbcm_paged_r(offs_t offset);
void bbcm_paged_w(offs_t offset, uint8_t data);
uint8_t bbcm_hazel_r(offs_t offset);
void bbcm_hazel_w(offs_t offset, uint8_t data);
uint8_t bbcm_tube_r(offs_t offset);
void bbcm_tube_w(offs_t offset, uint8_t data);
uint8_t bbcmc_paged_r(offs_t offset);
void bbcmc_paged_w(offs_t offset, uint8_t data);
void bbcbp_drive_control_w(uint8_t data);
void bbcm_drive_control_w(uint8_t data);
void serial_ula_w(uint8_t data);
void video_ula_w(offs_t offset, uint8_t data);
uint8_t bbc_fe_r() { return 0xfe; };
DECLARE_VIDEO_START(bbc);
INTERRUPT_GEN_MEMBER(bbcb_keyscan);
TIMER_CALLBACK_MEMBER(tape_timer_cb);
TIMER_CALLBACK_MEMBER(reset_timer_cb);
DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
DECLARE_WRITE_LINE_MEMBER(adlc_irq_w);
DECLARE_WRITE_LINE_MEMBER(bus_nmi_w);
DECLARE_WRITE_LINE_MEMBER(snd_enable_w);
DECLARE_WRITE_LINE_MEMBER(speech_rsq_w);
DECLARE_WRITE_LINE_MEMBER(speech_wsq_w);
DECLARE_WRITE_LINE_MEMBER(kbd_enable_w);
DECLARE_WRITE_LINE_MEMBER(capslock_led_w);
DECLARE_WRITE_LINE_MEMBER(shiftlock_led_w);
uint8_t via_system_porta_r();
void via_system_porta_w(uint8_t data);
uint8_t via_system_portb_r();
void via_system_portb_w(uint8_t data);
DECLARE_WRITE_LINE_MEMBER(lpstb_w);
DECLARE_WRITE_LINE_MEMBER(bbc_hsync_changed);
DECLARE_WRITE_LINE_MEMBER(bbc_vsync_changed);
DECLARE_WRITE_LINE_MEMBER(bbc_de_changed);
DECLARE_INPUT_CHANGED_MEMBER(reset_palette);
void update_palette(monitor_type monitor_type);
void update_acia_rxd();
void update_acia_dcd();
void update_acia_cts();
DECLARE_WRITE_LINE_MEMBER(write_rts);
DECLARE_WRITE_LINE_MEMBER(write_txd);
DECLARE_WRITE_LINE_MEMBER(write_rxd);
DECLARE_WRITE_LINE_MEMBER(write_dcd);
DECLARE_WRITE_LINE_MEMBER(write_cts);
DECLARE_INPUT_CHANGED_MEMBER(trigger_reset);
DECLARE_WRITE_LINE_MEMBER(fdc_intrq_w);
DECLARE_WRITE_LINE_MEMBER(fdc_drq_w);
int get_analogue_input(int channel_number);
void upd7002_eoc(int data);
std::string get_rom_name(uint8_t* header);
void insert_device_rom(memory_region *rom);
void setup_device_roms();
MC6845_UPDATE_ROW(crtc_update_row);
void bbca(machine_config &config);
void bbcb(machine_config &config);
void bbcb_de(machine_config &config);
void bbcb_us(machine_config &config);
void bbca_mem(address_map &map);
void bbc_base(address_map &map);
void bbcb_mem(address_map &map);
void init_bbc();
void init_ltmp();
void init_cfa();
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
virtual void video_start() override;
virtual void video_reset() override;
required_device<cpu_device> m_maincpu;
required_device<ram_device> m_ram;
required_device<mc6845_device> m_hd6845;
required_device<screen_device> m_screen;
required_device<input_merger_device> m_irqs;
required_device<palette_device> m_palette;
optional_device<mc6854_device> m_adlc;
optional_device<sn76489a_device> m_sn;
optional_device<samples_device> m_samples;
required_ioport_array<16> m_keyboard;
optional_device<saa5050_device> m_trom;
optional_device<tms5220_device> m_tms;
optional_device<cassette_image_device> m_cassette;
optional_device<acia6850_device> m_acia;
optional_device<clock_device> m_acia_clock;
required_device<ls259_device> m_latch;
optional_device<rs232_port_device> m_rs232;
required_device<via6522_device> m_via6522_0;
optional_device<via6522_device> m_via6522_1;
optional_device<upd7002_device> m_upd7002;
optional_device<bbc_analogue_slot_device> m_analog;
optional_device<bbc_joyport_slot_device> m_joyport;
optional_device<bbc_tube_slot_device> m_tube;
optional_device<bbc_tube_slot_device> m_intube;
optional_device<bbc_tube_slot_device> m_extube;
optional_device<bbc_1mhzbus_slot_device> m_1mhzbus;
optional_device<bbc_modem_slot_device> m_modem;
optional_device<bbc_userport_slot_device> m_userport;
optional_device<bbc_internal_slot_device> m_internal;
optional_device<bbc_exp_slot_device> m_exp;
optional_device<mc146818_device> m_rtc;
optional_device<i2cmem_device> m_i2cmem;
optional_device<bbc_fdc_slot_device> m_fdc;
optional_device<wd_fdc_digital_device_base> m_wd_fdc;
optional_device_array<bbc_romslot_device, 16> m_rom;
optional_device_array<bbc_cartslot_device, 2> m_cart;
required_memory_region m_region_mos;
required_memory_region m_region_swr;
optional_memory_bank m_bank1; // bbcbp bbcbp128 bbcm
optional_memory_bank m_bank2; // bbcbp bbcbp128 bbcm
optional_device<address_map_bank_device> m_bankdev; // bbcm
optional_ioport m_bbcconfig;
int m_romsel; // This is the latch that holds the sideways ROM bank to read
int m_paged_ram; // BBC B+ memory handling
int m_vdusel; // BBC B+ memory handling
/*
ACCCON
b7 IRR 1=Causes an IRQ to the processor
b6 TST 1=Selects &FC00-&FEFF read from OS-ROM
b5 IFJ 1=Internal 1 MHz bus
0=External 1MHz bus
b4 ITU 1=Internal Tube
0=External Tube
b3 Y 1=Read/Write HAZEL &C000-&DFFF RAM
0=Read/Write ROM &C000-&DFFF OS-ROM
b2 X 1=Read/Write LYNNE
0=Read/WRITE main memory &3000-&8000
b1 E 1=Causes shadow if VDU code
0=Main all the time
b0 D 1=Display LYNNE as screen
0=Display main RAM screen
ACCCON is a read/write register
*/
int m_acccon;
int m_acccon_irr;
int m_acccon_tst;
int m_acccon_ifj;
int m_acccon_itu;
int m_acccon_y;
int m_acccon_x;
int m_acccon_e;
int m_acccon_d;
void mc146818_set();
int m_mc146818_as; // 6522 port b bit 7
int m_mc146818_ce; // 6522 port b bit 6
int m_via_system_porta;
// interrupt state
int m_adlc_irq;
int m_bus_nmi;
int m_column; // this is a counter in the keyboard circuit
/***************************************
BBC 2C199 Serial Interface Cassette
****************************************/
double m_last_dev_val;
int m_wav_len;
int m_len0;
int m_len1;
int m_len2;
int m_len3;
uint8_t m_serproc_data;
int m_rxd_serial;
int m_dcd_serial;
int m_cts_serial;
int m_dcd_cass;
int m_rxd_cass;
int m_cass_out_enabled;
int m_txd;
uint32_t m_nr_high_tones;
int m_cass_out_samples_to_go;
int m_cass_out_bit;
int m_cass_out_phase;
emu_timer *m_tape_timer;
/**************************************
WD1770 disc control
***************************************/
int m_fdc_irq;
int m_fdc_drq;
/**************************************
Video Code
***************************************/
// this is the real location of the start of the BBC's ram in the emulation
// it can be changed if shadow ram is being used to point at the upper 32K of RAM
uint8_t *m_video_ram;
uint8_t m_pixel_bits[256];
int m_hsync;
int m_vsync;
uint8_t m_teletext_latch;
uint8_t m_vula_ctrl;
struct video_nula {
uint8_t palette_mode;
uint8_t horiz_offset;
uint8_t left_blank;
uint8_t disable;
uint8_t attr_mode;
uint8_t attr_text;
uint8_t flash[8];
uint8_t palette_byte;
uint8_t palette_write;
} m_vnula;
int m_pixels_per_byte;
int m_cursor_size;
uint8_t m_vula_palette[16];
uint8_t m_vula_palette_lookup[16];
void setvideoshadow(int vdusel);
void set_pixel_lookup();
uint8_t bus_video_data();
int bbc_keyboard(int data);
void mc6850_receive_clock(int new_clock);
void cassette_motor(bool state);
void update_nmi();
uint16_t calculate_video_address(uint16_t ma, uint8_t ra);
private:
emu_timer *m_reset_timer;
};
class torch_state : public bbc_state
{
public:
using bbc_state::bbc_state;
static constexpr feature_type imperfect_features() { return feature::KEYBOARD; }
void torchf(machine_config &config);
void torchh(machine_config &config);
void torch301(machine_config &config);
void torch725(machine_config &config);
};
class bbcbp_state : public bbc_state
{
public:
using bbc_state::bbc_state;
void bbcbp(machine_config &config);
void bbcbp128(machine_config &config);
void abc110(machine_config &config);
void acw443(machine_config &config);
void abc310(machine_config &config);
void econx25(machine_config &config);
void reutapm(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
void bbcbp_mem(address_map &map);
void reutapm_mem(address_map &map);
void bbcbp_fetch(address_map &map);
};
class bbcm_state : public bbc_state
{
public:
using bbc_state::bbc_state;
void bbcm(machine_config &config);
void bbcmt(machine_config &config);
void bbcmet(machine_config &config);
void bbcmaiv(machine_config &config);
void bbcm512(machine_config &config);
void bbcmarm(machine_config &config);
void cfa3000(machine_config &config);
void daisy(machine_config &config);
void discmon(machine_config &config);
void discmate(machine_config &config);
void bbcmc(machine_config &config);
void pro128s(machine_config &config);
void autoc15(machine_config &config);
protected:
virtual void machine_start() override;
virtual void machine_reset() override;
void bbcm_mem(address_map &map);
void bbcm_bankdev(address_map &map);
void bbcmet_bankdev(address_map &map);
void bbcmc_mem(address_map &map);
void bbcmc_bankdev(address_map &map);
void autoc15_bankdev(address_map &map);
void bbcm_fetch(address_map &map);
};
#endif // MAME_INCLUDES_BBC_H
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