/*****************************************************************************
*
* includes/pdp1.h
*
****************************************************************************/
#ifndef PDP1_H_
#define PDP1_H_
/* defines for each bit and mask in input port "CSW" */
enum
{
/* bit numbers */
pdp1_control_bit = 0,
pdp1_extend_bit = 1,
pdp1_start_nobrk_bit= 2,
pdp1_start_brk_bit = 3,
pdp1_stop_bit = 4,
pdp1_continue_bit = 5,
pdp1_examine_bit = 6,
pdp1_deposit_bit = 7,
pdp1_read_in_bit = 8,
pdp1_reader_bit = 9,
pdp1_tape_feed_bit = 10,
pdp1_single_step_bit= 11,
pdp1_single_inst_bit= 12,
/* masks */
pdp1_control = (1 << pdp1_control_bit),
pdp1_extend = (1 << pdp1_extend_bit),
pdp1_start_nobrk = (1 << pdp1_start_nobrk_bit),
pdp1_start_brk = (1 << pdp1_start_brk_bit),
pdp1_stop = (1 << pdp1_stop_bit),
pdp1_continue = (1 << pdp1_continue_bit),
pdp1_examine = (1 << pdp1_examine_bit),
pdp1_deposit = (1 << pdp1_deposit_bit),
pdp1_read_in = (1 << pdp1_read_in_bit),
pdp1_reader = (1 << pdp1_reader_bit),
pdp1_tape_feed = (1 << pdp1_tape_feed_bit),
pdp1_single_step = (1 << pdp1_single_step_bit),
pdp1_single_inst = (1 << pdp1_single_inst_bit)
};
/* defines for each bit in input port pdp1_spacewar_controllers*/
#define ROTATE_LEFT_PLAYER1 0x01
#define ROTATE_RIGHT_PLAYER1 0x02
#define THRUST_PLAYER1 0x04
#define FIRE_PLAYER1 0x08
#define ROTATE_LEFT_PLAYER2 0x10
#define ROTATE_RIGHT_PLAYER2 0x20
#define THRUST_PLAYER2 0x40
#define FIRE_PLAYER2 0x80
#define HSPACE_PLAYER1 0x100
#define HSPACE_PLAYER2 0x200
/* defines for each field in input port pdp1_config */
enum
{
pdp1_config_extend_bit = 0,
pdp1_config_extend_mask = 0x3, /* 2 bits */
pdp1_config_hw_mul_div_bit = 2,
pdp1_config_hw_mul_div_mask = 0x1,
/*pdp1_config_hw_obsolete_bit = 3,
pdp1_config_hw_obsolete_mask = 0x1,*/
pdp1_config_type_20_sbs_bit = 4,
pdp1_config_type_20_sbs_mask = 0x1,
pdp1_config_lightpen_bit = 5,
pdp1_config_lightpen_mask = 0x1
};
/* defines for each field in input port pdp1_lightpen_state */
enum
{
pdp1_lightpen_down_bit = 0,
pdp1_lightpen_smaller_bit = 1,
pdp1_lightpen_larger_bit = 2,
pdp1_lightpen_down = (1 << pdp1_lightpen_down_bit),
pdp1_lightpen_smaller = (1 << pdp1_lightpen_smaller_bit),
pdp1_lightpen_larger = (1 << pdp1_lightpen_larger_bit)
};
/* defines for our font */
enum
{
pdp1_charnum = /*104*/128, /* ASCII set + 8 special characters */
/* for whatever reason, 104 breaks some characters */
pdp1_fontdata_size = 8 * pdp1_charnum
};
enum
{
/* size and position of crt window */
crt_window_width = 512,
crt_window_height = 512,
crt_window_offset_x = 0,
crt_window_offset_y = 0,
/* size and position of operator control panel window */
panel_window_width = 384,
panel_window_height = 128,
panel_window_offset_x = crt_window_width,
panel_window_offset_y = 0,
/* size and position of typewriter window */
typewriter_window_width = 640,
typewriter_window_height = 160,
typewriter_window_offset_x = 0,
typewriter_window_offset_y = crt_window_height
};
enum
{
total_width = crt_window_width + panel_window_width,
total_height = crt_window_height + typewriter_window_height,
/* respect 4:3 aspect ratio to keep pixels square */
virtual_width_1 = ((total_width+3)/4)*4,
virtual_height_1 = ((total_height+2)/3)*3,
virtual_width_2 = virtual_height_1*4/3,
virtual_height_2 = virtual_width_1*3/4,
virtual_width = (virtual_width_1 > virtual_width_2) ? virtual_width_1 : virtual_width_2,
virtual_height = (virtual_height_1 > virtual_height_2) ? virtual_height_1 : virtual_height_2
};
enum
{ /* refresh rate in Hz: can be changed at will */
refresh_rate = 60
};
/* Color codes */
enum
{
/* first pen_crt_num_levels colors used for CRT (with remanence) */
pen_crt_num_levels = 69,
pen_crt_max_intensity = pen_crt_num_levels-1,
/* next colors used for control panel and typewriter */
pen_black = pen_crt_num_levels,
pen_white,
pen_green,
pen_dk_green,
pen_red,
pen_lt_gray,
/* color constants for control panel */
pen_panel_bg = pen_black,
pen_panel_caption = pen_white,
color_panel_caption = 0,
pen_switch_nut = pen_lt_gray,
pen_switch_button = pen_white,
pen_lit_lamp = pen_green,
pen_unlit_lamp = pen_dk_green,
/* color constants for typewriter */
pen_typewriter_bg = pen_white,
color_typewriter_black = 1,
color_typewriter_red = 2,
/* color constants used for light pen */
pen_lightpen_nonpressed = pen_red,
pen_lightpen_pressed = pen_green
};
/* tape reader registers */
typedef struct tape_reader_t
{
device_image_interface *fd; /* file descriptor of tape image */
int motor_on; /* 1-bit reader motor on */
int rb; /* 18-bit reader buffer */
int rcl; /* 1-bit reader clutch */
int rc; /* 2-bit reader counter */
int rby; /* 1-bit reader binary mode flip-flop */
int rcp; /* 1-bit reader "need a completion pulse" flip-flop */
emu_timer *timer; /* timer to simulate reader timing */
} tape_reader_t;
/* tape puncher registers */
typedef struct tape_puncher_t
{
device_image_interface *fd; /* file descriptor of tape image */
emu_timer *timer; /* timer to generate completion pulses */
} tape_puncher_t;
/* typewriter registers */
typedef struct typewriter_t
{
device_image_interface *fd; /* file descriptor of output image */
int tb; /* typewriter buffer */
emu_timer *tyo_timer;/* timer to generate completion pulses */
} typewriter_t;
/* MIT parallel drum (mostly similar to type 23) */
typedef struct parallel_drum_t
{
device_image_interface *fd; /* file descriptor of drum image */
int il; /* initial location (12-bit) */
int wc; /* word counter (12-bit) */
int wcl; /* word core location counter (16-bit) */
int rfb; /* read field buffer (5-bit) */
int wfb; /* write field buffer (5-bit) */
int dba;
emu_timer *rotation_timer; /* timer called each time dc is 0 */
emu_timer *il_timer; /* timer called each time dc is il */
} parallel_drum_t;
typedef struct lightpen_t
{
char active;
char down;
short x, y;
short radius;
} lightpen_t;
class pdp1_state : public driver_device
{
public:
pdp1_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) { }
pdp1_reset_param_t m_reset_param;
int m_io_status;
tape_reader_t m_tape_reader;
tape_puncher_t m_tape_puncher;
typewriter_t m_typewriter;
emu_timer *m_dpy_timer;
lightpen_t m_lightpen;
parallel_drum_t m_parallel_drum;
int m_old_typewriter_keys[4];
int m_old_lightpen;
int m_old_control_keys;
int m_old_tw_keys;
int m_old_ta_keys;
int m_typewriter_color;
bitmap_ind16 m_panel_bitmap;
bitmap_ind16 m_typewriter_bitmap;
lightpen_t m_lightpen_state;
lightpen_t m_previous_lightpen_state;
int m_pos;
int m_case_shift;
device_t *m_crt;
};
/*----------- defined in video/pdp1.c -----------*/
VIDEO_START( pdp1 );
SCREEN_VBLANK( pdp1 );
SCREEN_UPDATE_IND16( pdp1 );
void pdp1_plot(running_machine &machine, int x, int y);
void pdp1_typewriter_drawchar(running_machine &machine, int character);
void pdp1_update_lightpen_state(running_machine &machine, const lightpen_t *new_state);
#endif /* PDP1_H_ */