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+// license:GPL-2.0+
+// copyright-holders:Raphael Nabet
+/*****************************************************************************
+ *
+ * includes/pdp1.h
+ *
+ ****************************************************************************/
+
+#ifndef PDP1_H_
+#define PDP1_H_
+
+#include "cpu/pdp1/pdp1.h"
+#include "video/crt.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 */
+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 puncher registers */
+struct tape_puncher_t
+{
+ device_image_interface *fd; /* file descriptor of tape image */
+
+ emu_timer *timer; /* timer to generate completion pulses */
+};
+
+
+
+/* typewriter registers */
+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 */
+};
+
+/* MIT parallel drum (mostly similar to type 23) */
+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 */
+};
+
+
+struct lightpen_t
+{
+ char active;
+ char down;
+ short x, y;
+ short radius;
+};
+
+
+class pdp1_state : public driver_device
+{
+public:
+ pdp1_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_gfxdecode(*this, "gfxdecode"),
+ m_palette(*this, "palette"),
+ m_crt(*this, "crt"),
+ m_spacewar(*this, "SPACEWAR"),
+ m_csw(*this, "CSW"),
+ m_sense(*this, "SENSE"),
+ m_tstadd(*this, "TSTADD"),
+ m_twdmsb(*this, "TWDMSB"),
+ m_twdlsb(*this, "TWDLSB"),
+ m_twr(*this, "TWR"),
+ m_cfg(*this, "CFG"),
+ m_io_lightpen(*this, "LIGHTPEN"),
+ m_lightx(*this, "LIGHTX"),
+ m_lighty(*this, "LIGHTY")
+ { }
+
+ 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;
+ required_device<pdp1_device> m_maincpu;
+
+ virtual void machine_start();
+ virtual void machine_reset();
+ virtual void video_start();
+ DECLARE_PALETTE_INIT(pdp1);
+ UINT32 screen_update_pdp1(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
+ void screen_eof_pdp1(screen_device &screen, bool state);
+ INTERRUPT_GEN_MEMBER(pdp1_interrupt);
+ TIMER_CALLBACK_MEMBER(reader_callback);
+ TIMER_CALLBACK_MEMBER(puncher_callback);
+ TIMER_CALLBACK_MEMBER(tyo_callback);
+ TIMER_CALLBACK_MEMBER(dpy_callback);
+ TIMER_CALLBACK_MEMBER(il_timer_callback);
+ void pdp1_machine_stop();
+ inline void pdp1_plot_pixel(bitmap_ind16 &bitmap, int x, int y, UINT32 color);
+ void pdp1_plot(int x, int y);
+ void pdp1_draw_led(bitmap_ind16 &bitmap, int x, int y, int state);
+ void pdp1_draw_multipleled(bitmap_ind16 &bitmap, int x, int y, int value, int nb_bits);
+ void pdp1_draw_switch(bitmap_ind16 &bitmap, int x, int y, int state);
+ void pdp1_draw_multipleswitch(bitmap_ind16 &bitmap, int x, int y, int value, int nb_bits);
+ void pdp1_draw_char(bitmap_ind16 &bitmap, char character, int x, int y, int color);
+ void pdp1_draw_string(bitmap_ind16 &bitmap, const char *buf, int x, int y, int color);
+ void pdp1_draw_panel_backdrop(bitmap_ind16 &bitmap);
+ void pdp1_draw_panel(bitmap_ind16 &bitmap);
+ void pdp1_typewriter_linefeed();
+ void pdp1_typewriter_drawchar(int character);
+ void pdp1_update_lightpen_state(const lightpen_t *new_state);
+ void pdp1_draw_circle(bitmap_ind16 &bitmap, int x, int y, int radius, int color_);
+ void pdp1_erase_lightpen(bitmap_ind16 &bitmap);
+ void pdp1_draw_lightpen(bitmap_ind16 &bitmap);
+ int tape_read(UINT8 *reply);
+ void begin_tape_read(int binary, int nac);
+ void tape_write(UINT8 data);
+ void typewriter_out(UINT8 data);
+ void parallel_drum_set_il(int il);
+ void parallel_drum_init();
+ UINT32 drum_read(int field, int position);
+ void drum_write(int field, int position, UINT32 data);
+ void pdp1_keyboard();
+ void pdp1_lightpen();
+ int read_spacewar() { return m_spacewar->read(); }
+
+private:
+ pdp1_reset_param_t m_reset_param;
+ 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;
+ required_device<gfxdecode_device> m_gfxdecode;
+ required_device<palette_device> m_palette;
+ required_device<crt_device> m_crt;
+ required_ioport m_spacewar;
+ required_ioport m_csw;
+ required_ioport m_sense;
+ required_ioport m_tstadd;
+ required_ioport m_twdmsb;
+ required_ioport m_twdlsb;
+ required_ioport_array<4> m_twr;
+ required_ioport m_cfg;
+ required_ioport m_io_lightpen;
+ required_ioport m_lightx;
+ required_ioport m_lighty;
+};
+#endif /* PDP1_H_ */