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hp9845: big improvement to TACO driver after study of SIF utilities

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This commit is contained in:
fulivi 2016-04-06 12:26:00 +02:00
parent e740ed13ec
commit 874aac03cf
2 changed files with 573 additions and 400 deletions
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951
src/devices/machine/hp_taco.cpp
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File diff suppressed because it is too large Load Diff

22
src/devices/machine/hp_taco.h
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@ -88,20 +88,32 @@ private:
tape_pos_t m_tach_reg_ref;
bool m_tach_reg_frozen;
UINT16 m_checksum_reg;
bool m_clear_checksum_reg;
UINT16 m_timing_reg;
// State
bool m_irq;
bool m_flg;
bool m_sts;
UINT8 m_cmd_state;
// Command FSM state
typedef enum {
CMD_IDLE,
CMD_INVERTING,
CMD_PH0,
CMD_PH1,
CMD_PH2,
CMD_PH3,
CMD_END,
CMD_STOPPING
} cmd_state_t;
cmd_state_t m_cmd_state;
// Tape position & motion
tape_pos_t m_tape_pos;
attotime m_start_time; // Tape moving if != never
bool m_tape_fwd;
bool m_tape_fast;
bool m_tape_stopping;
// Timers
emu_timer *m_tape_timer;
@ -130,6 +142,7 @@ private:
void clear_state(void);
void irq_w(bool state);
void set_error(bool state);
bool is_braking(void) const;
unsigned speed_to_tick_freq(void) const;
bool pos_offset(tape_pos_t& pos , tape_pos_t offset) const;
tape_pos_t current_tape_pos(void) const;
@ -137,10 +150,10 @@ private:
void update_tach_reg(void);
void freeze_tach_reg(bool freeze);
static void ensure_a_lt_b(tape_pos_t& a , tape_pos_t& b);
static bool any_hole(tape_pos_t tape_pos_a , tape_pos_t tape_pos_b);
tape_pos_t next_hole(void) const;
attotime time_to_distance(tape_pos_t distance) const;
attotime time_to_target(tape_pos_t target) const;
attotime time_to_stopping_pos(void) const;
bool start_tape_cmd(UINT16 cmd_reg , UINT16 must_be_1 , UINT16 must_be_0);
void stop_tape(void);
tape_track_t& current_track(void);
@ -155,6 +168,7 @@ private:
adv_res_t adv_it(tape_track_t::iterator& it);
attotime fetch_next_wr_word(void);
attotime time_to_rd_next_word(tape_pos_t& word_rd_pos);
tape_pos_t min_gap_size(void) const;
bool next_n_gap(tape_pos_t& pos , tape_track_t::iterator it , unsigned n_gaps , tape_pos_t min_gap);
bool next_n_gap(tape_pos_t& pos , unsigned n_gaps , tape_pos_t min_gap);
void clear_tape(void);
@ -165,6 +179,8 @@ private:
void set_tape_present(bool present);
attotime time_to_next_hole(void) const;
attotime time_to_tach_pulses(void) const;
void terminate_cmd_now(void);
void cmd_fsm(void);
void start_cmd_exec(UINT16 new_cmd_reg);
};