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-rw-r--r--src/mess/includes/bbc.h439
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diff --git a/src/mess/includes/bbc.h b/src/mess/includes/bbc.h
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-// license:BSD-3-Clause
-// copyright-holders:Gordon Jefferyes, Nigel Barnes
-/*****************************************************************************
- *
- * includes/bbc.h
- *
- * BBC Model B
- *
- * Driver by Gordon Jefferyes <mess_bbc@romvault.com>
- *
- ****************************************************************************/
-
-#ifndef BBC_H_
-#define BBC_H_
-
-#include "bus/rs232/rs232.h"
-#include "machine/6522via.h"
-#include "machine/6850acia.h"
-#include "machine/clock.h"
-#include "machine/mc6854.h"
-#include "machine/ram.h"
-#include "machine/i8271.h"
-#include "machine/wd_fdc.h"
-#include "machine/upd7002.h"
-#include "machine/mc146818.h"
-#include "video/mc6845.h"
-#include "video/saa5050.h"
-#include "sound/sn76496.h"
-#include "sound/tms5220.h"
-#include "imagedev/cassette.h"
-
-#include "bus/generic/slot.h"
-#include "bus/generic/carts.h"
-
-#define RS232_TAG "rs232"
-
-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_mc6845(*this, "mc6845"),
- m_adlc(*this, "mc6854"),
- m_sn(*this, "sn76489"),
- m_trom(*this, "saa5050"),
- m_tms(*this, "tms5220"),
- m_cassette(*this, "cassette"),
- m_acia(*this, "acia6850"),
- m_acia_clock(*this, "acia_clock"),
- m_rs232(*this, RS232_TAG),
- m_via6522_0(*this, "via6522_0"),
- m_via6522_1(*this, "via6522_1"),
- m_upd7002(*this, "upd7002"),
- m_rtc(*this, "rtc"),
- m_i8271(*this, "i8271"),
- m_wd1770(*this, "wd1770"),
- m_wd1772(*this, "wd1772"),
- m_exp1(*this, "exp_rom1"),
- m_exp2(*this, "exp_rom2"),
- m_exp3(*this, "exp_rom3"),
- m_exp4(*this, "exp_rom4"),
- m_joy0(*this, "JOY0"),
- m_joy1(*this, "JOY1"),
- m_joy2(*this, "JOY2"),
- m_joy3(*this, "JOY3"),
- m_region_maincpu(*this, "maincpu"),
- m_region_os(*this, "os"),
- m_region_opt(*this, "option"),
- m_bank1(*this, "bank1"),
- m_bank2(*this, "bank2"),
- m_bank3(*this, "bank3"),
- m_bank4(*this, "bank4"),
- m_bank5(*this, "bank5"),
- m_bank6(*this, "bank6"),
- m_bank7(*this, "bank7"),
- m_bank8(*this, "bank8"),
- m_ACCCON_IRR(CLEAR_LINE),
- m_via_system_irq(CLEAR_LINE),
- m_via_user_irq(CLEAR_LINE),
- m_acia_irq(CLEAR_LINE),
- m_palette(*this, "palette")
- { }
-
- DECLARE_FLOPPY_FORMATS(floppy_formats_525sd);
- DECLARE_FLOPPY_FORMATS(floppy_formats_525dd);
- DECLARE_FLOPPY_FORMATS(floppy_formats_35dd);
-
- DECLARE_WRITE8_MEMBER(bbc_page_selecta_w);
- DECLARE_WRITE8_MEMBER(bbc_memorya1_w);
- DECLARE_WRITE8_MEMBER(bbc_page_selectb_w);
- DECLARE_WRITE8_MEMBER(bbc_memoryb3_w);
- DECLARE_WRITE8_MEMBER(bbc_memoryb4_w);
- DECLARE_WRITE8_MEMBER(bbc_page_selectbp_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybp1_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybp2_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybp4_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybp4_128_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybp6_128_w);
- DECLARE_READ8_MEMBER(bbcm_ACCCON_read);
- DECLARE_WRITE8_MEMBER(bbcm_ACCCON_write);
- DECLARE_WRITE8_MEMBER(page_selectbm_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybm1_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybm2_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybm4_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybm5_w);
- DECLARE_WRITE8_MEMBER(bbc_memorybm7_w);
- DECLARE_READ8_MEMBER(bbcm_r);
- DECLARE_WRITE8_MEMBER(bbcm_w);
- DECLARE_WRITE8_MEMBER(bbc_SerialULA_w);
-
- DECLARE_WRITE8_MEMBER(bbc_wd1770_status_w);
- DECLARE_READ8_MEMBER(bbcm_wd177xl_read);
- DECLARE_WRITE8_MEMBER(bbcm_wd1770l_write);
- DECLARE_WRITE8_MEMBER(bbcm_wd1772l_write);
- DECLARE_WRITE8_MEMBER(bbc_videoULA_w);
- DECLARE_READ8_MEMBER(bbc_fe_r);
- DECLARE_DIRECT_UPDATE_MEMBER(bbcbp_direct_handler);
- DECLARE_DIRECT_UPDATE_MEMBER(bbcm_direct_handler);
-
- DECLARE_DRIVER_INIT(bbc);
-
- DECLARE_MACHINE_START(bbca);
- DECLARE_MACHINE_RESET(bbca);
- DECLARE_VIDEO_START(bbca);
-
- DECLARE_MACHINE_START(bbcb);
- DECLARE_MACHINE_RESET(bbcb);
- DECLARE_VIDEO_START(bbcb);
-
- DECLARE_MACHINE_START(bbcbp);
- DECLARE_MACHINE_RESET(bbcbp);
- DECLARE_VIDEO_START(bbcbp);
-
- DECLARE_MACHINE_START(bbcm);
- DECLARE_MACHINE_RESET(bbcm);
- DECLARE_VIDEO_START(bbcm);
-
- DECLARE_PALETTE_INIT(bbc);
- UINT32 screen_update_bbc(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
- INTERRUPT_GEN_MEMBER(bbcb_vsync);
- INTERRUPT_GEN_MEMBER(bbcb_keyscan);
- INTERRUPT_GEN_MEMBER(bbcm_keyscan);
- TIMER_CALLBACK_MEMBER(bbc_tape_timer_cb);
- DECLARE_WRITE_LINE_MEMBER(write_acia_clock);
- DECLARE_WRITE_LINE_MEMBER(bbcb_acia6850_irq_w);
- DECLARE_WRITE_LINE_MEMBER(econet_clk_w);
- DECLARE_WRITE8_MEMBER(bbcb_via_system_write_porta);
- DECLARE_WRITE8_MEMBER(bbcb_via_system_write_portb);
- DECLARE_READ8_MEMBER(bbcb_via_system_read_porta);
- DECLARE_READ8_MEMBER(bbcb_via_system_read_portb);
- DECLARE_WRITE_LINE_MEMBER(bbcb_via_system_irq_w);
- DECLARE_READ8_MEMBER(bbcb_via_user_read_portb);
- DECLARE_WRITE8_MEMBER(bbcb_via_user_write_portb);
- DECLARE_WRITE_LINE_MEMBER(bbcb_via_user_irq_w);
- DECLARE_WRITE_LINE_MEMBER(bbc_wd177x_intrq_w);
- DECLARE_WRITE_LINE_MEMBER(bbc_wd177x_drq_w);
- DECLARE_WRITE_LINE_MEMBER(bbc_vsync);
- void update_acia_rxd();
- void update_acia_dcd();
- void update_acia_cts();
- DECLARE_WRITE_LINE_MEMBER(bbc_rts_w);
- DECLARE_WRITE_LINE_MEMBER(bbc_txd_w);
- DECLARE_WRITE_LINE_MEMBER(write_rxd_serial);
- DECLARE_WRITE_LINE_MEMBER(write_dcd_serial);
- DECLARE_WRITE_LINE_MEMBER(write_cts_serial);
- DECLARE_INPUT_CHANGED_MEMBER( trigger_reset );
- DECLARE_WRITE_LINE_MEMBER(bbc_i8271_interrupt);
- DECLARE_WRITE_LINE_MEMBER(motor_w);
-
- UPD7002_GET_ANALOGUE(BBC_get_analogue_input);
- UPD7002_EOC(BBC_uPD7002_EOC);
-
- void bbc_setup_banks(memory_bank *membank, int banks, UINT32 shift, UINT32 size);
- void bbcm_setup_banks(memory_bank *membank, int banks, UINT32 shift, UINT32 size);
-
- int bbc_load_cart(device_image_interface &image, generic_slot_device *slot);
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp1_load) { return bbc_load_cart(image, m_exp1); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp2_load) { return bbc_load_cart(image, m_exp2); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp3_load) { return bbc_load_cart(image, m_exp3); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(exp4_load) { return bbc_load_cart(image, m_exp4); }
-
- int bbcm_load_cart(device_image_interface &image, generic_slot_device *slot);
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(bbcm_exp1_load) { return bbcm_load_cart(image, m_exp1); }
- DECLARE_DEVICE_IMAGE_LOAD_MEMBER(bbcm_exp2_load) { return bbcm_load_cart(image, m_exp2); }
-
- MC6845_UPDATE_ROW(crtc_update_row);
-
-private:
- required_device<cpu_device> m_maincpu;
- required_device<ram_device> m_ram;
- required_device<mc6845_device> m_mc6845;
- optional_device<mc6854_device> m_adlc;
- optional_device<sn76489_device> m_sn;
-public: // HACK FOR MC6845
- 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;
- 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<mc146818_device> m_rtc;
- optional_device<i8271_device> m_i8271;
- optional_device<wd1770_t> m_wd1770;
- optional_device<wd1772_t> m_wd1772;
- required_device<generic_slot_device> m_exp1;
- required_device<generic_slot_device> m_exp2;
- optional_device<generic_slot_device> m_exp3;
- optional_device<generic_slot_device> m_exp4;
- optional_ioport m_joy0, m_joy1, m_joy2, m_joy3;
-
- required_memory_region m_region_maincpu;
- required_memory_region m_region_os;
- required_memory_region m_region_opt;
- required_memory_bank m_bank1; // bbca bbcb bbcbp bbcbp128 bbcm
- optional_memory_bank m_bank2; // bbcbp bbcbp128 bbcm
- optional_memory_bank m_bank3; // bbca bbcb
- required_memory_bank m_bank4; // bbca bbcb bbcbp bbcbp128 bbcm
- optional_memory_bank m_bank5; // bbcm
- optional_memory_bank m_bank6; // bbcbp bbcbp128
- required_memory_bank m_bank7; // bbca bbcb bbcbp bbcbp128 bbcm
- optional_memory_bank m_bank8; // bbcm
-
- void check_interrupts();
-
- int m_SWRAMtype; // this stores the DIP switch setting for the SWRAM type being used
- int m_Speech; // this stores the CONF setting for Speech enabled/disabled
-
- int m_ACCCON_IRR; // IRQ inputs
-
- int m_rombank; // This is the latch that holds the sideways ROM bank to read
-
- int m_userport; // This stores the sideways RAM latch type.
- // Acorn and others use the bbc_rombank latch to select the write bank to be used.(type 0)
- // Solidisc use the BBC's userport to select the write bank to be used (type 1)
-
- int m_pagedRAM; // 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_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;
-
-
- /*
- The addressable latch
- This 8 bit addressable latch is operated from port B lines 0-3.
- PB0-PB2 are set to the required address of the output bit to be set.
- PB3 is set to the value which should be programmed at that bit.
- The function of the 8 output bits from this latch are:-
-
- B0 - Write Enable to the sound generator IC
- B1 - READ select on the speech processor
- B2 - WRITE select on the speech processor
- B3 - Keyboard write enable
- B4,B5 - these two outputs define the number to be added to the
- start of screen address in hardware to control hardware scrolling:-
- Mode Size Start of screen Number to add B5 B4
- 0,1,2 20K &3000 12K 1 1
- 3 16K &4000 16K 0 0
- 4,5 10K &5800 (or &1800) 22K 1 0
- 6 8K &6000 (or &2000) 24K 0 1
- B6 - Operates the CAPS lock LED (Pin 17 keyboard connector)
- B7 - Operates the SHIFT lock LED (Pin 16 keyboard connector)
- */
-
- int m_b0_sound;
- int m_b1_speech_read;
- int m_b2_speech_write;
- int m_b3_keyboard;
- int m_b4_video0;
- int m_b5_video1;
- int m_b6_caps_lock_led;
- int m_b7_shift_lock_led;
-
- int m_MC146818_WR; // FE30 bit 1 replaces b1_speech_read
- int m_MC146818_DS; // FE30 bit 2 replaces b2_speech_write
- int m_MC146818_AS; // 6522 port b bit 7
- int m_MC146818_CE; // 6522 port b bit 6
-
- int m_via_system_porta;
- int m_via_system_irq;
- int m_via_user_irq;
- int m_acia_irq;
-
- 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;
- int m_mc6850_clock;
- UINT8 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 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;
-
-
- /**************************************
- i8271 disc control
- ***************************************/
-
- int m_previous_i8271_int_state; // 8271 interrupt status
-
- /**************************************
- WD1770 disc control
- ***************************************/
-
- int m_drive_control;
- int m_wd177x_irq_state;
- int m_wd177x_drq_state;
- int m_previous_wd177x_int_state;
- int m_177x_IntEnabled;
-
- /**************************************
- Video Code
- ***************************************/
-
- int m_memorySize;
-
-
-// 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
-
-// this is the screen memory location of the next pixels to be drawn
-
-// this is a more global variable to store the bitmap variable passed in in the bbc_vh_screenrefresh function
-
-// this is the X and Y screen location in emulation pixels of the next pixels to be drawn
-
-
- unsigned char *m_BBC_Video_RAM;
- UINT16 *m_BBC_display;
- UINT16 *m_BBC_display_left;
- UINT16 *m_BBC_display_right;
- bitmap_ind16 *m_BBC_bitmap;
- int m_y_screen_pos;
- unsigned char m_pixel_bits[256];
- int m_BBC_HSync;
- int m_BBC_VSync;
-
-
- int m_Teletext_Latch;
- int m_VideoULA_CR;
- int m_VideoULA_CR_counter;
- int m_videoULA_Reg;
- int m_videoULA_master_cursor_size;
- int m_videoULA_width_of_cursor;
- int m_videoULA_6845_clock_rate;
- int m_videoULA_characters_per_line;
- int m_videoULA_teletext_normal_select;
- int m_videoULA_flash_colour_select;
-
-
- int m_pixels_per_byte;
- int m_emulation_pixels_per_real_pixel;
- int m_emulation_pixels_per_byte;
-
- int m_emulation_cursor_size;
- int m_cursor_state;
-
- int m_videoULA_pallet0[16];
- int m_videoULA_pallet1[16];
- int *m_videoULA_pallet_lookup;
-
- void (*m_draw_function)(running_machine &machine);
-
- void bbcbp_setvideoshadow(int vdusel);
- void common_init(int memorySize);
- void set_pixel_lookup();
- void set_cursor(bbc_state *state);
- void BBC_Clock_CR(bbc_state *state);
- void BBC_draw_teletext();
- void BBC_ula_drawpixel(bbc_state *state, int col, int number_of_pixels);
- void BBC_draw_hi_res();
- void BBC_Set_HSync(int offset, int data);
- void BBC_Set_VSync(int offset, int data);
- void BBC_Set_CRE(int offset, int data);
- void bbc_frameclock();
- int vdudriverset();
- int bbcm_vdudriverset();
- int bbc_keyboard(address_space &space, int data);
- void bbcb_IC32_initialise(bbc_state *state);
- void MC146818_set(address_space &space);
- void bbc_TMSint(int status);
- void MC6850_Receive_Clock(int new_clock);
- void BBC_Cassette_motor(unsigned char status);
- void bbc_update_fdq_int(int state);
- unsigned int calculate_video_address(int ma,int ra);
- required_device<palette_device> m_palette;
-};
-
-#endif /* BBC_H_ */