From fec7ca20757bd4b049a4ad084bffff6f6156d34a Mon Sep 17 00:00:00 2001 From: fulivi Date: Sun, 6 Mar 2016 16:29:43 +0100 Subject: [PATCH] hp9845: call_display and a different approach to stopping tape added to TACO driver. --- src/devices/machine/hp_taco.cpp | 987 +++++++++++++++++--------------- src/devices/machine/hp_taco.h | 161 +++--- 2 files changed, 597 insertions(+), 551 deletions(-) diff --git a/src/devices/machine/hp_taco.cpp b/src/devices/machine/hp_taco.cpp index eb94faf3b05..664279199e7 100644 --- a/src/devices/machine/hp_taco.cpp +++ b/src/devices/machine/hp_taco.cpp @@ -134,11 +134,12 @@ // #include "emu.h" #include "hp_taco.h" +#include "ui/ui.h" // Debugging #define VERBOSE 1 #define LOG(x) do { if (VERBOSE) logerror x; } while (0) -#define VERBOSE_0 0 +#define VERBOSE_0 1 #define LOG_0(x) do { if (VERBOSE_0) logerror x; } while (0) // Macros to clear/set single bits @@ -160,13 +161,13 @@ enum { #define ONE_INCH_POS (TACH_TICKS_PER_INCH * TAPE_POS_FRACT) // Value in tape_pos_t representing 1 inch of tape #define TACH_FREQ_SLOW 21276 // Tachometer pulse frequency for slow speed (21.98 ips) #define TACH_FREQ_FAST 87196 // Tachometer pulse frequency for fast speed (90.08 ips) +#define TACH_FREQ_BRAKE_SLOW 11606 // Tachometer pulse frequency when stopping from slow speed (11.99 ips) +#define TACH_FREQ_BRAKE_FAST 44566 // Tachometer pulse frequency when stopping from fast speed (46.04 ips) #define TAPE_LENGTH ((140 * 12 + 72 * 2) * ONE_INCH_POS) // Tape length: 140 ft of usable tape + 72" of punched tape at either end #define TAPE_INIT_POS (80 * ONE_INCH_POS) // Initial tape position: 80" from beginning (just past the punched part) #define ZERO_BIT_LEN 619 // Length of 0 bits at slow tape speed: 1/(35200 Hz) #define ONE_BIT_LEN 1083 // Length of 1 bits at slow tape speed: 1.75 times ZERO_BIT_LEN #define QUICK_CMD_USEC 25 // usec for "quick" command execution -#define FAST_BRAKE_MSEC 73 // Braking time from fast speed to stop (2 ips) in msec (deceleration is 1200 in/s^2) -#define SLOW_BRAKE_MSEC 17 // Braking time from slow speed to stop in msec #define FAST_BRAKE_DIST 3350450 // Braking distance at fast speed (~3.38 in) #define SLOW_BRAKE_DIST 197883 // Braking distance at slow speed (~0.2 in) #define PREAMBLE_WORD 0 // Value of preamble word @@ -377,35 +378,36 @@ void hp_taco_device::device_config_complete() // device_start void hp_taco_device::device_start() { - LOG(("device_start")); - m_irq_handler.resolve_safe(); - m_flg_handler.resolve_safe(); - m_sts_handler.resolve_safe(); + LOG(("device_start")); + m_irq_handler.resolve_safe(); + m_flg_handler.resolve_safe(); + m_sts_handler.resolve_safe(); - save_item(NAME(m_data_reg)); - save_item(NAME(m_data_reg_full)); - save_item(NAME(m_cmd_reg)); - save_item(NAME(m_cmd_state)); - save_item(NAME(m_status_reg)); - save_item(NAME(m_tach_reg)); - save_item(NAME(m_checksum_reg)); - save_item(NAME(m_timing_reg)); - save_item(NAME(m_irq)); - save_item(NAME(m_flg)); - save_item(NAME(m_sts)); - save_item(NAME(m_tape_pos)); - save_item(NAME(m_start_time)); - save_item(NAME(m_tape_fwd)); - save_item(NAME(m_tape_fast)); - save_item(NAME(m_image_dirty)); - save_item(NAME(m_tape_wr)); - save_item(NAME(m_rw_pos)); - save_item(NAME(m_next_word)); - save_item(NAME(m_rd_it_valid)); - save_item(NAME(m_gap_detect_start)); + save_item(NAME(m_data_reg)); + save_item(NAME(m_data_reg_full)); + save_item(NAME(m_cmd_reg)); + save_item(NAME(m_cmd_state)); + save_item(NAME(m_status_reg)); + save_item(NAME(m_tach_reg)); + save_item(NAME(m_checksum_reg)); + save_item(NAME(m_timing_reg)); + save_item(NAME(m_irq)); + save_item(NAME(m_flg)); + save_item(NAME(m_sts)); + save_item(NAME(m_tape_pos)); + save_item(NAME(m_start_time)); + save_item(NAME(m_tape_fwd)); + save_item(NAME(m_tape_fast)); + save_item(NAME(m_tape_stopping)); + save_item(NAME(m_image_dirty)); + save_item(NAME(m_tape_wr)); + save_item(NAME(m_rw_pos)); + save_item(NAME(m_next_word)); + save_item(NAME(m_rd_it_valid)); + save_item(NAME(m_gap_detect_start)); - m_tape_timer = timer_alloc(TAPE_TMR_ID); - m_hole_timer = timer_alloc(HOLE_TMR_ID); + m_tape_timer = timer_alloc(TAPE_TMR_ID); + m_hole_timer = timer_alloc(HOLE_TMR_ID); } // device_stop @@ -429,227 +431,227 @@ void hp_taco_device::device_reset() void hp_taco_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { - if (CMD_CODE(m_cmd_reg) != CMD_STOP) { - update_tape_pos(); - } + update_tape_pos(); - switch (id) { - case TAPE_TMR_ID: - LOG_0(("Tape tmr @%g\n" , machine().time().as_double())); + switch (id) { + case TAPE_TMR_ID: + LOG_0(("Tape tmr @%g\n" , machine().time().as_double())); - tape_pos_t length; + tape_pos_t length; - switch (CMD_CODE(m_cmd_reg)) { - case CMD_INDTA_INGAP: - if (m_cmd_state == 0) { - m_cmd_state = 1; - tape_pos_t target = m_tape_pos; - if (next_n_gap(target, 1, MIN_IRG_LENGTH)) { - m_tape_timer->adjust(time_to_target(target)); - } - return; - } - break; + switch (CMD_CODE(m_cmd_reg)) { + case CMD_INDTA_INGAP: + if (m_cmd_state == 0) { + m_cmd_state = 1; + tape_pos_t target = m_tape_pos; + if (next_n_gap(target, 1, MIN_IRG_LENGTH)) { + m_tape_timer->adjust(time_to_target(target)); + } + return; + } + break; - case CMD_RECORD_WRITE: - if (m_cmd_state == 0) { - if (m_rd_it->second == PREAMBLE_WORD) { - LOG_0(("Got preamble\n")); - m_cmd_state = 1; - // m_rw_pos already at correct position - m_tape_timer->adjust(fetch_next_wr_word()); - break; - } else { - adv_res_t res = adv_it(m_rd_it); - if (res != ADV_NO_MORE_DATA) { - m_tape_timer->adjust(time_to_rd_next_word(m_rw_pos)); - } - // No IRQ - return; - } - } - // Intentional fall-through - case CMD_INIT_WRITE: - write_word(m_rw_pos , m_next_word , length); - pos_offset(m_rw_pos , length); - // Just to be sure.. - m_tape_pos = m_rw_pos; - m_tape_timer->adjust(fetch_next_wr_word()); - break; + case CMD_RECORD_WRITE: + if (m_cmd_state == 0) { + if (m_rd_it->second == PREAMBLE_WORD) { + LOG_0(("Got preamble\n")); + m_cmd_state = 1; + // m_rw_pos already at correct position + m_tape_timer->adjust(fetch_next_wr_word()); + break; + } else { + adv_res_t res = adv_it(m_rd_it); + if (res != ADV_NO_MORE_DATA) { + m_tape_timer->adjust(time_to_rd_next_word(m_rw_pos)); + } + // No IRQ + return; + } + } + // Intentional fall-through + case CMD_INIT_WRITE: + write_word(m_rw_pos , m_next_word , length); + pos_offset(m_rw_pos , length); + // Just to be sure.. + m_tape_pos = m_rw_pos; + m_tape_timer->adjust(fetch_next_wr_word()); + break; - case CMD_STOP: - move_tape_pos(m_tape_fast ? FAST_BRAKE_DIST : SLOW_BRAKE_DIST); - stop_tape(); - break; + case CMD_STOP: + stop_tape(); + m_tape_stopping = false; + break; - case CMD_INGAP_MOVE: - if (m_cmd_state == 0) { - m_cmd_state = 1; - m_tape_timer->adjust(time_to_tach_pulses()); - return; - } - break; + case CMD_INGAP_MOVE: + if (m_cmd_state == 0) { + m_cmd_state = 1; + m_tape_timer->adjust(time_to_tach_pulses()); + return; + } + break; - case CMD_FINAL_GAP: - case CMD_WRITE_IRG: - write_gap(m_rw_pos , m_tape_pos); - m_hole_timer->reset(); - break; + case CMD_FINAL_GAP: + case CMD_WRITE_IRG: + write_gap(m_rw_pos , m_tape_pos); + m_hole_timer->reset(); + break; - case CMD_SCAN_RECORDS: - if (m_cmd_state == 0) { - m_cmd_state = 1; - tape_pos_t target = m_tape_pos; - if (next_n_gap(target, 0x10000U - m_tach_reg, MIN_IRG_LENGTH)) { - LOG_0(("%u gaps @%d\n" , 0x10000U - m_tach_reg, target)); - m_tape_timer->adjust(time_to_target(target)); - } - return; - } else { - m_hole_timer->reset(); - } - break; + case CMD_SCAN_RECORDS: + if (m_cmd_state == 0) { + m_cmd_state = 1; + tape_pos_t target = m_tape_pos; + if (next_n_gap(target, 0x10000U - m_tach_reg, MIN_IRG_LENGTH)) { + LOG_0(("%u gaps @%d\n" , 0x10000U - m_tach_reg, target)); + m_tape_timer->adjust(time_to_target(target)); + } + return; + } else { + m_hole_timer->reset(); + } + break; - case CMD_MOVE_INDTA: - if (m_cmd_state == 0) { - if (next_data(m_rd_it , m_tape_pos , true)) { - m_cmd_state = 1; - m_tape_timer->adjust(time_to_target(farthest_end(m_rd_it))); - } - // No IRQ - return; - } - // m_cmd_state == 1 -> IRQ & cmd end - break; + case CMD_MOVE_INDTA: + if (m_cmd_state == 0) { + if (next_data(m_rd_it , m_tape_pos , true)) { + m_cmd_state = 1; + m_tape_timer->adjust(time_to_target(farthest_end(m_rd_it))); + } + // No IRQ + return; + } + // m_cmd_state == 1 -> IRQ & cmd end + break; - case CMD_DELTA_MOVE_HOLE: - case CMD_DELTA_MOVE_IRG: - // Interrupt at end of movement - m_hole_timer->reset(); - break; + case CMD_DELTA_MOVE_HOLE: + case CMD_DELTA_MOVE_IRG: + // Interrupt at end of movement + m_hole_timer->reset(); + break; - case CMD_START_READ: - { - bool set_intr = true; - // Just to be sure.. - m_tape_pos = m_rw_pos; - if (m_cmd_state == 0) { - set_intr = false; - if (m_rd_it->second == PREAMBLE_WORD) { - m_cmd_state = 1; - } - LOG_0(("Got preamble\n")); - } else { - m_data_reg = m_rd_it->second; - m_checksum_reg += m_data_reg; - LOG_0(("RD %04x\n" , m_data_reg)); - } - adv_res_t res = adv_it(m_rd_it); - LOG_0(("adv_it %d\n" , res)); - if (res == ADV_NO_MORE_DATA) { - m_rd_it_valid = false; - } else { - if (res == ADV_DISCONT_DATA) { - // Hit a gap, restart preamble search - m_cmd_state = 0; - } - m_tape_timer->adjust(time_to_rd_next_word(m_rw_pos)); - } - if (!set_intr) { - return; - } - } - break; + case CMD_START_READ: + { + bool set_intr = true; + // Just to be sure.. + m_tape_pos = m_rw_pos; - case CMD_END_READ: - { - m_tape_pos = m_rw_pos; - // Note: checksum is not updated - m_data_reg = m_rd_it->second; - LOG_0(("Final RD %04x\n" , m_data_reg)); - adv_res_t res = adv_it(m_rd_it); - if (res == ADV_NO_MORE_DATA) { - m_rd_it_valid = false; - } - m_hole_timer->reset(); - } - break; + if (m_cmd_state == 0) { + set_intr = false; + if (m_rd_it->second == PREAMBLE_WORD) { + m_cmd_state = 1; + LOG_0(("Got preamble\n")); + } + } else { + m_data_reg = m_rd_it->second; + m_checksum_reg += m_data_reg; + LOG_0(("RD %04x\n" , m_data_reg)); + } + adv_res_t res = adv_it(m_rd_it); + LOG_0(("adv_it %d\n" , res)); + if (res == ADV_NO_MORE_DATA) { + m_rd_it_valid = false; + } else { + if (res == ADV_DISCONT_DATA) { + // Hit a gap, restart preamble search + m_cmd_state = 0; + } + m_tape_timer->adjust(time_to_rd_next_word(m_rw_pos)); + } + if (!set_intr) { + return; + } + } + break; - default: - // Other commands: just raise irq - break; - } - irq_w(true); - break; + case CMD_END_READ: + { + m_tape_pos = m_rw_pos; + // Note: checksum is not updated + m_data_reg = m_rd_it->second; + LOG_0(("Final RD %04x\n" , m_data_reg)); + adv_res_t res = adv_it(m_rd_it); + if (res == ADV_NO_MORE_DATA) { + m_rd_it_valid = false; + } + m_hole_timer->reset(); + } + break; - case HOLE_TMR_ID: - LOG_0(("Hole tmr @%g\n" , machine().time().as_double())); + default: + // Other commands: just raise irq + break; + } + irq_w(true); + break; - BIT_SET(m_status_reg , STATUS_HOLE_BIT); + case HOLE_TMR_ID: + LOG_0(("Hole tmr @%g\n" , machine().time().as_double())); - switch (CMD_CODE(m_cmd_reg)) { - case CMD_FINAL_GAP: - case CMD_WRITE_IRG: - write_gap(m_rw_pos , m_tape_pos); - m_rw_pos = m_tape_pos; - break; + BIT_SET(m_status_reg , STATUS_HOLE_BIT); - case CMD_SCAN_RECORDS: - case CMD_DELTA_MOVE_HOLE: - // Cmds 18 & 1c are terminated at first hole - m_tape_timer->reset(); - irq_w(true); - // No reloading of hole timer - return; + switch (CMD_CODE(m_cmd_reg)) { + case CMD_FINAL_GAP: + case CMD_WRITE_IRG: + write_gap(m_rw_pos , m_tape_pos); + m_rw_pos = m_tape_pos; + break; - case CMD_DELTA_MOVE_IRG: - // TODO: update r6 - m_hole_timer->adjust(time_to_next_hole()); - // No IRQ at holes - return; + case CMD_SCAN_RECORDS: + case CMD_DELTA_MOVE_HOLE: + // Cmds 18 & 1c are terminated at first hole + m_tape_timer->reset(); + irq_w(true); + // No reloading of hole timer + return; - case CMD_START_READ: - case CMD_END_READ: - set_error(true); - break; + case CMD_DELTA_MOVE_IRG: + // TODO: update r6 + m_hole_timer->adjust(time_to_next_hole()); + // No IRQ at holes + return; - default: - // Other cmds: default processing (update tape pos, set IRQ, schedule timer for next hole) - break; - } + case CMD_START_READ: + case CMD_END_READ: + set_error(true); + break; - irq_w(true); - m_hole_timer->adjust(time_to_next_hole()); - break; + default: + // Other cmds: default processing (update tape pos, set IRQ, schedule timer for next hole) + break; + } - default: - break; - } + irq_w(true); + m_hole_timer->adjust(time_to_next_hole()); + break; + + default: + break; + } } void hp_taco_device::clear_state(void) { - m_data_reg = 0; - m_data_reg_full = false; - m_cmd_reg = 0; - m_status_reg = 0; - m_tach_reg = 0; - m_checksum_reg = 0; - m_timing_reg = 0; - m_cmd_state = 0; - // m_tape_pos is not reset, tape stays where it is - m_start_time = attotime::never; - m_tape_fwd = false; - m_tape_fast = false; - // m_image_dirty is not touched - m_tape_wr = false; - m_rw_pos = 0; - m_next_word = 0; - m_rd_it_valid = false; - m_gap_detect_start = NULL_TAPE_POS; + m_data_reg = 0; + m_data_reg_full = false; + m_cmd_reg = 0; + m_status_reg = 0; + m_tach_reg = 0; + m_checksum_reg = 0; + m_timing_reg = 0; + m_cmd_state = 0; + // m_tape_pos is not reset, tape stays where it is + m_start_time = attotime::never; + m_tape_fwd = false; + m_tape_fast = false; + m_tape_stopping = false; + // m_image_dirty is not touched + m_tape_wr = false; + m_rw_pos = 0; + m_next_word = 0; + m_rd_it_valid = false; + m_gap_detect_start = NULL_TAPE_POS; - set_tape_present(false); - set_tape_present(is_loaded()); + set_tape_present(false); + set_tape_present(is_loaded()); } void hp_taco_device::irq_w(bool state) @@ -670,7 +672,9 @@ void hp_taco_device::set_error(bool state) unsigned hp_taco_device::speed_to_tick_freq(void) const { - return m_tape_fast ? TACH_FREQ_FAST * TAPE_POS_FRACT : TACH_FREQ_SLOW * TAPE_POS_FRACT; + return m_tape_stopping ? + (m_tape_fast ? TACH_FREQ_BRAKE_FAST * TAPE_POS_FRACT : TACH_FREQ_BRAKE_SLOW * TAPE_POS_FRACT) : + (m_tape_fast ? TACH_FREQ_FAST * TAPE_POS_FRACT : TACH_FREQ_SLOW * TAPE_POS_FRACT); } bool hp_taco_device::pos_offset(tape_pos_t& pos , tape_pos_t offset) const @@ -697,47 +701,50 @@ bool hp_taco_device::pos_offset(tape_pos_t& pos , tape_pos_t offset) const } } -void hp_taco_device::move_tape_pos(tape_pos_t delta_pos) +hp_taco_device::tape_pos_t hp_taco_device::current_tape_pos(void) const { - tape_pos_t tape_start_pos = m_tape_pos; - if (!pos_offset(m_tape_pos , delta_pos)) { - LOG(("Tape unspooled!\n")); - } - m_start_time = machine().time(); - LOG_0(("Tape pos = %u\n" , m_tape_pos)); - if (any_hole(tape_start_pos , m_tape_pos)) { - // Crossed one or more holes - BIT_SET(m_status_reg , STATUS_HOLE_BIT); - } + attotime delta_time(machine().time() - m_start_time); + LOG_0(("delta_time = %g\n" , delta_time.as_double())); + // How many tachometer ticks has the tape moved? + tape_pos_t delta_tach = (tape_pos_t)(delta_time.as_ticks(speed_to_tick_freq())); + LOG_0(("delta_tach = %u\n" , delta_tach)); + + tape_pos_t tape_pos = m_tape_pos; + if (!pos_offset(tape_pos , delta_tach)) { + LOG(("Tape unspooled!\n")); + } + + return tape_pos; } void hp_taco_device::update_tape_pos(void) { - if (m_start_time.is_never()) { - // Tape not moving - return; - } + if (m_start_time.is_never()) { + // Tape not moving + return; + } - attotime delta_time(machine().time() - m_start_time); - LOG_0(("delta_time = %g\n" , delta_time.as_double())); - // How many tachometer ticks has the tape moved? - tape_pos_t delta_tach = (tape_pos_t)(delta_time.as_ticks(speed_to_tick_freq())); - LOG_0(("delta_tach = %u\n" , delta_tach)); + tape_pos_t tape_start_pos = m_tape_pos; + m_tape_pos = current_tape_pos(); + m_start_time = machine().time(); + LOG_0(("Tape pos = %u\n" , m_tape_pos)); - move_tape_pos(delta_tach); - - // Gap detection - bool gap_detected = false; - if (m_gap_detect_start != NULL_TAPE_POS && abs(m_gap_detect_start - m_tape_pos) >= MIN_IRG_LENGTH) { - tape_pos_t tmp = m_tape_pos; - pos_offset(tmp , -MIN_IRG_LENGTH); - gap_detected = just_gap(tmp , m_tape_pos); - } - if (gap_detected) { - BIT_SET(m_status_reg, STATUS_GAP_BIT); - } else { - BIT_CLR(m_status_reg, STATUS_GAP_BIT); - } + if (any_hole(tape_start_pos , m_tape_pos)) { + // Crossed one or more holes + BIT_SET(m_status_reg , STATUS_HOLE_BIT); + } + // Gap detection + bool gap_detected = false; + if (m_gap_detect_start != NULL_TAPE_POS && abs(m_gap_detect_start - m_tape_pos) >= MIN_IRG_LENGTH) { + tape_pos_t tmp = m_tape_pos; + pos_offset(tmp , -MIN_IRG_LENGTH); + gap_detected = just_gap(tmp , m_tape_pos); + } + if (gap_detected) { + BIT_SET(m_status_reg, STATUS_GAP_BIT); + } else { + BIT_CLR(m_status_reg, STATUS_GAP_BIT); + } } void hp_taco_device::ensure_a_lt_b(tape_pos_t& a , tape_pos_t& b) @@ -802,41 +809,43 @@ attotime hp_taco_device::time_to_target(tape_pos_t target) const bool hp_taco_device::start_tape_cmd(UINT16 cmd_reg , UINT16 must_be_1 , UINT16 must_be_0) { - m_cmd_reg = cmd_reg; + m_cmd_reg = cmd_reg; - UINT16 to_be_tested = (m_cmd_reg & CMD_REG_MASK) | (m_status_reg & STATUS_REG_MASK); - // Bits in STATUS_ERR_MASK must always be 0 - must_be_0 |= STATUS_ERR_MASK; + UINT16 to_be_tested = (m_cmd_reg & CMD_REG_MASK) | (m_status_reg & STATUS_REG_MASK); + // Bits in STATUS_ERR_MASK must always be 0 + must_be_0 |= STATUS_ERR_MASK; - // It's not an error if the error state is already set (sts false) - if (((to_be_tested & (must_be_1 | must_be_0)) ^ must_be_1) != 0) { - set_error(true); - return false; - } else { - bool prev_tape_wr = m_tape_wr; - bool prev_tape_fwd = m_tape_fwd; - bool prev_tape_fast = m_tape_fast; - bool not_moving = m_start_time.is_never(); + // It's not an error if the error state is already set (sts false) + if (((to_be_tested & (must_be_1 | must_be_0)) ^ must_be_1) != 0) { + set_error(true); + return false; + } else { + bool prev_tape_wr = m_tape_wr; + bool prev_tape_fwd = m_tape_fwd; + bool prev_tape_fast = m_tape_fast; + bool prev_tape_stopping = m_tape_stopping; + bool not_moving = m_start_time.is_never(); - m_start_time = machine().time(); - m_tape_wr = (must_be_0 & STATUS_WPR_MASK) != 0; - m_tape_fwd = DIR_FWD(m_cmd_reg); - m_tape_fast = SPEED_FAST(m_cmd_reg); - // TODO: remove? - BIT_CLR(m_status_reg, STATUS_HOLE_BIT); + m_start_time = machine().time(); + m_tape_wr = (must_be_0 & STATUS_WPR_MASK) != 0; + m_tape_fwd = DIR_FWD(m_cmd_reg); + m_tape_fast = SPEED_FAST(m_cmd_reg); + m_tape_stopping = false; + // TODO: remove? + BIT_CLR(m_status_reg, STATUS_HOLE_BIT); - if (m_tape_wr) { - // Write command: disable gap detector - m_gap_detect_start = NULL_TAPE_POS; - BIT_CLR(m_status_reg, STATUS_GAP_BIT); - m_image_dirty = true; - } else if (not_moving || prev_tape_wr != m_tape_wr || prev_tape_fwd != m_tape_fwd || prev_tape_fast != m_tape_fast) { - // Tape started right now, switched from writing to reading, direction changed or speed changed: (re)start gap detector - m_gap_detect_start = m_tape_pos; - BIT_CLR(m_status_reg, STATUS_GAP_BIT); - } - return true; - } + if (m_tape_wr) { + // Write command: disable gap detector + m_gap_detect_start = NULL_TAPE_POS; + BIT_CLR(m_status_reg, STATUS_GAP_BIT); + m_image_dirty = true; + } else if (not_moving || prev_tape_stopping || prev_tape_wr != m_tape_wr || prev_tape_fwd != m_tape_fwd || prev_tape_fast != m_tape_fast) { + // Tape started or re-started right now, switched from writing to reading, direction changed or speed changed: (re)start gap detector + m_gap_detect_start = m_tape_pos; + BIT_CLR(m_status_reg, STATUS_GAP_BIT); + } + return true; + } } void hp_taco_device::stop_tape(void) @@ -1218,211 +1227,211 @@ attotime hp_taco_device::time_to_tach_pulses(void) const void hp_taco_device::start_cmd_exec(UINT16 new_cmd_reg) { - LOG(("Cmd = %02x\n" , CMD_CODE(new_cmd_reg))); + LOG(("Cmd = %02x\n" , CMD_CODE(new_cmd_reg))); - update_tape_pos(); + update_tape_pos(); - attotime cmd_duration = attotime::never; - attotime time_to_hole = attotime::never; + attotime cmd_duration = attotime::never; + attotime time_to_hole = attotime::never; - unsigned new_cmd_code = CMD_CODE(new_cmd_reg); + unsigned new_cmd_code = CMD_CODE(new_cmd_reg); - if (new_cmd_code != CMD_START_READ && - new_cmd_code != CMD_END_READ && - new_cmd_code != CMD_CLEAR) { - m_rd_it_valid = false; - } + if (new_cmd_code != CMD_START_READ && + new_cmd_code != CMD_END_READ && + new_cmd_code != CMD_CLEAR) { + m_rd_it_valid = false; + } - switch (new_cmd_code) { - case CMD_INDTA_INGAP: - // Errors: CART OUT,FAST SPEED - if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - m_cmd_state = 0; - if (next_data(m_rd_it , m_tape_pos , true)) { - cmd_duration = time_to_target(farthest_end(m_rd_it)); - } - } - break; + switch (new_cmd_code) { + case CMD_INDTA_INGAP: + // Errors: CART OUT,FAST SPEED + if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + m_cmd_state = 0; + if (next_data(m_rd_it , m_tape_pos , true)) { + cmd_duration = time_to_target(farthest_end(m_rd_it)); + } + } + break; - case CMD_FINAL_GAP: - // Errors: WP,CART OUT - if (start_tape_cmd(new_cmd_reg , 0 , STATUS_WPR_MASK)) { - m_rw_pos = m_tape_pos; - cmd_duration = time_to_distance(END_GAP_LENGTH); - time_to_hole = time_to_next_hole(); - } - break; + case CMD_FINAL_GAP: + // Errors: WP,CART OUT + if (start_tape_cmd(new_cmd_reg , 0 , STATUS_WPR_MASK)) { + m_rw_pos = m_tape_pos; + cmd_duration = time_to_distance(END_GAP_LENGTH); + time_to_hole = time_to_next_hole(); + } + break; - case CMD_CLEAR: - set_error(false); - BIT_CLR(m_status_reg, STATUS_HOLE_BIT); - BIT_CLR(m_status_reg, STATUS_CART_OUT_BIT); - BIT_CLR(m_status_reg, STATUS_WPR_BIT); - set_tape_present(is_loaded()); - // This is a special command: it doesn't raise IRQ at completion and it - // doesn't replace current command - return; + case CMD_CLEAR: + set_error(false); + BIT_CLR(m_status_reg, STATUS_HOLE_BIT); + BIT_CLR(m_status_reg, STATUS_CART_OUT_BIT); + BIT_CLR(m_status_reg, STATUS_WPR_BIT); + set_tape_present(is_loaded()); + // This is a special command: it doesn't raise IRQ at completion and it + // doesn't replace current command + return; - case CMD_NOT_INDTA: - // Errors: CART OUT,FAST SPEED - if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - tape_pos_t target = m_tape_pos; - if (next_n_gap(target, 1, NO_DATA_GAP)) { - LOG_0(("End of data @%d\n" , target)); - cmd_duration = time_to_target(target); - } - // Holes detected? - } - break; + case CMD_NOT_INDTA: + // Errors: CART OUT,FAST SPEED + if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + tape_pos_t target = m_tape_pos; + if (next_n_gap(target, 1, NO_DATA_GAP)) { + LOG_0(("End of data @%d\n" , target)); + cmd_duration = time_to_target(target); + } + // Holes detected? + } + break; - case CMD_INIT_WRITE: - // Errors: WP,CART OUT,fast speed,reverse - if (start_tape_cmd(new_cmd_reg , DIR_FWD_MASK , STATUS_WPR_MASK | SPEED_FAST_MASK)) { - m_next_word = PREAMBLE_WORD; - m_rw_pos = m_tape_pos; - cmd_duration = time_to_distance(word_length(m_next_word)); - } - break; + case CMD_INIT_WRITE: + // Errors: WP,CART OUT,fast speed,reverse + if (start_tape_cmd(new_cmd_reg , DIR_FWD_MASK , STATUS_WPR_MASK | SPEED_FAST_MASK)) { + m_next_word = PREAMBLE_WORD; + m_rw_pos = m_tape_pos; + cmd_duration = time_to_distance(word_length(m_next_word)); + } + break; - case CMD_STOP: - if (CMD_CODE(m_cmd_reg) != CMD_STOP) { - if (m_start_time.is_never()) { - // Tape is already stopped - cmd_duration = attotime::from_usec(QUICK_CMD_USEC); - } else { - // Start braking timer - cmd_duration = attotime::from_msec(m_tape_fast ? FAST_BRAKE_MSEC : SLOW_BRAKE_MSEC); - } - m_cmd_reg = new_cmd_reg; - } else { - // TODO: check if ok - return; - } - break; + case CMD_STOP: + if (!m_tape_stopping) { + if (m_start_time.is_never()) { + // Tape is already stopped + cmd_duration = attotime::from_usec(QUICK_CMD_USEC); + } else { + // Start braking timer + m_tape_stopping = true; + cmd_duration = time_to_distance(m_tape_fast ? FAST_BRAKE_DIST : SLOW_BRAKE_DIST); + } + m_cmd_reg = new_cmd_reg; + } else { + return; + } + break; - case CMD_SET_TRACK: - // Don't know if this command really starts the tape or not (probably it doesn't) - if (start_tape_cmd(new_cmd_reg , 0 , 0)) { - // When b9 is 0, set track A/B - // When b9 is 1, ignore command (in TACO chip it has an unknown purpose) - if (!UNKNOWN_B9(new_cmd_reg)) { - if (CMD_OPT(new_cmd_reg)) { - BIT_SET(m_status_reg, STATUS_TRACKB_BIT); - } else { - BIT_CLR(m_status_reg, STATUS_TRACKB_BIT); - } - } - cmd_duration = attotime::from_usec(QUICK_CMD_USEC); - } - break; + case CMD_SET_TRACK: + // Don't know if this command really starts the tape or not (probably it doesn't) + if (start_tape_cmd(new_cmd_reg , 0 , 0)) { + // When b9 is 0, set track A/B + // When b9 is 1, ignore command (in TACO chip it has an unknown purpose) + if (!UNKNOWN_B9(new_cmd_reg)) { + if (CMD_OPT(new_cmd_reg)) { + BIT_SET(m_status_reg, STATUS_TRACKB_BIT); + } else { + BIT_CLR(m_status_reg, STATUS_TRACKB_BIT); + } + } + cmd_duration = attotime::from_usec(QUICK_CMD_USEC); + } + break; - case CMD_MOVE: - if (start_tape_cmd(new_cmd_reg , 0 , 0)) { - time_to_hole = time_to_next_hole(); - } - break; + case CMD_MOVE: + if (start_tape_cmd(new_cmd_reg , 0 , 0)) { + time_to_hole = time_to_next_hole(); + } + break; - case CMD_INGAP_MOVE: - // Errors: CART OUT,FAST SPEED - if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - m_cmd_state = 0; - tape_pos_t target = m_tape_pos; - if (next_n_gap(target, 1, MIN_IRG_LENGTH)) { - LOG_0(("IRG @%d\n" , target)); - cmd_duration = time_to_target(target); - } - // Holes detected? - } - break; + case CMD_INGAP_MOVE: + // Errors: CART OUT,FAST SPEED + if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + m_cmd_state = 0; + tape_pos_t target = m_tape_pos; + if (next_n_gap(target, 1, MIN_IRG_LENGTH)) { + LOG_0(("IRG @%d\n" , target)); + cmd_duration = time_to_target(target); + } + // Holes detected? + } + break; - case CMD_WRITE_IRG: - // Errors: WP,CART OUT - if (start_tape_cmd(new_cmd_reg , 0 , STATUS_WPR_MASK)) { - m_rw_pos = m_tape_pos; - cmd_duration = time_to_tach_pulses(); - time_to_hole = time_to_next_hole(); - } - break; + case CMD_WRITE_IRG: + // Errors: WP,CART OUT + if (start_tape_cmd(new_cmd_reg , 0 , STATUS_WPR_MASK)) { + m_rw_pos = m_tape_pos; + cmd_duration = time_to_tach_pulses(); + time_to_hole = time_to_next_hole(); + } + break; - case CMD_SCAN_RECORDS: - // Errors: CART OUT - if (start_tape_cmd(new_cmd_reg , 0 , 0)) { - m_cmd_state = 0; - if (next_data(m_rd_it , m_tape_pos , true)) { - cmd_duration = time_to_target(farthest_end(m_rd_it)); - } - time_to_hole = time_to_next_hole(); - } - break; + case CMD_SCAN_RECORDS: + // Errors: CART OUT + if (start_tape_cmd(new_cmd_reg , 0 , 0)) { + m_cmd_state = 0; + if (next_data(m_rd_it , m_tape_pos , true)) { + cmd_duration = time_to_target(farthest_end(m_rd_it)); + } + time_to_hole = time_to_next_hole(); + } + break; - case CMD_RECORD_WRITE: - // Errors: WP,CART OUT,fast speed,reverse - if (start_tape_cmd(new_cmd_reg , DIR_FWD_MASK , STATUS_WPR_MASK | SPEED_FAST_MASK)) { - // Search for preamble first - m_cmd_state = 0; - m_rd_it_valid = next_data(m_rd_it , m_tape_pos , false); - cmd_duration = time_to_rd_next_word(m_rw_pos); - // Holes detected? - } - break; + case CMD_RECORD_WRITE: + // Errors: WP,CART OUT,fast speed,reverse + if (start_tape_cmd(new_cmd_reg , DIR_FWD_MASK , STATUS_WPR_MASK | SPEED_FAST_MASK)) { + // Search for preamble first + m_cmd_state = 0; + m_rd_it_valid = next_data(m_rd_it , m_tape_pos , false); + cmd_duration = time_to_rd_next_word(m_rw_pos); + // Holes detected? + } + break; - case CMD_MOVE_INDTA: - // Errors: CART OUT,FAST SPEED - if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - m_cmd_state = 0; - cmd_duration = time_to_tach_pulses(); - // Holes detected? - } - break; + case CMD_MOVE_INDTA: + // Errors: CART OUT,FAST SPEED + if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + m_cmd_state = 0; + cmd_duration = time_to_tach_pulses(); + // Holes detected? + } + break; - case CMD_UNK_1b: - if (start_tape_cmd(new_cmd_reg , 0 , 0)) { - // Unknown purpose, but make it a NOP (it's used in "T" test of test ROM) - cmd_duration = attotime::from_usec(QUICK_CMD_USEC); - } - break; + case CMD_UNK_1b: + if (start_tape_cmd(new_cmd_reg , 0 , 0)) { + // Unknown purpose, but make it a NOP (it's used in "T" test of test ROM) + cmd_duration = attotime::from_usec(QUICK_CMD_USEC); + } + break; - case CMD_DELTA_MOVE_HOLE: - case CMD_DELTA_MOVE_IRG: - if (start_tape_cmd(new_cmd_reg , 0 , 0)) { - cmd_duration = time_to_tach_pulses(); - time_to_hole = time_to_next_hole(); - } - break; + case CMD_DELTA_MOVE_HOLE: + case CMD_DELTA_MOVE_IRG: + if (start_tape_cmd(new_cmd_reg , 0 , 0)) { + cmd_duration = time_to_tach_pulses(); + time_to_hole = time_to_next_hole(); + } + break; - case CMD_START_READ: - // Yes, you can read tape backwards: test "C" does that! - // Because of this DIR_FWD_MASK is not in the "must be 1" mask. - if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - // TODO: check anche m_rw_pos sforato - if (!m_rd_it_valid) { - // Search for preamble first - m_cmd_state = 0; - m_rd_it_valid = next_data(m_rd_it , m_tape_pos , false); - } + case CMD_START_READ: + // Yes, you can read tape backwards: test "C" does that! + // Because of this DIR_FWD_MASK is not in the "must be 1" mask. + if (start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + // TODO: check anche m_rw_pos sforato + if (!m_rd_it_valid) { + // Search for preamble first + m_cmd_state = 0; + m_rd_it_valid = next_data(m_rd_it , m_tape_pos , false); + } - cmd_duration = time_to_rd_next_word(m_rw_pos); - time_to_hole = time_to_next_hole(); - } - break; + cmd_duration = time_to_rd_next_word(m_rw_pos); + time_to_hole = time_to_next_hole(); + } + break; - case CMD_END_READ: - // This command only makes sense after CMD_START_READ - if (CMD_CODE(m_cmd_reg) == CMD_START_READ && m_cmd_state == 1 && - start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { - LOG_0(("END_READ %d\n" , m_rd_it_valid)); - cmd_duration = time_to_rd_next_word(m_rw_pos); - time_to_hole = time_to_next_hole(); - } - break; + case CMD_END_READ: + // This command only makes sense after CMD_START_READ + if (CMD_CODE(m_cmd_reg) == CMD_START_READ && m_cmd_state == 1 && + start_tape_cmd(new_cmd_reg , 0 , SPEED_FAST_MASK)) { + LOG_0(("END_READ %d\n" , m_rd_it_valid)); + cmd_duration = time_to_rd_next_word(m_rw_pos); + time_to_hole = time_to_next_hole(); + } + break; - default: - LOG(("Unrecognized command\n")); - break; - } + default: + LOG(("Unrecognized command\n")); + break; + } - m_tape_timer->adjust(cmd_duration); - m_hole_timer->adjust(time_to_hole); + m_tape_timer->adjust(cmd_duration); + m_hole_timer->adjust(time_to_hole); } bool hp_taco_device::call_load() @@ -1461,6 +1470,42 @@ void hp_taco_device::call_unload() set_tape_present(false); } +void hp_taco_device::call_display() +{ + // Mostly lifted from cassette_image_device::call_display ;) + + // Do not show anything if image not loaded or tape not moving + if (!exists() || m_start_time.is_never()) { + return; + } + + char buffer[ 64 ]; + + char track = BIT(m_status_reg , STATUS_TRACKB_BIT) ? 'B' : 'A'; + char r_w = m_tape_wr ? 'W' : 'R'; + char m1; + char m2; + + if (m_tape_fwd) { + m1 = '>'; + m2 = m_tape_fast ? '>' : ' '; + } else { + m1 = '<'; + m2 = m_tape_fast ? '<' : ' '; + } + + int pos_in = current_tape_pos() / ONE_INCH_POS; + + snprintf(buffer , sizeof(buffer) , "%c %c %c%c [%04d/1824]" , track , r_w , m1 , m2 , pos_in); + + float x, y; + x = 0.2f; + y = 0.5f; + y *= device().machine().ui().get_line_height() + 2.0f * UI_BOX_TB_BORDER; + + device().machine().ui().draw_text_box(&device().machine().render().ui_container(), buffer, JUSTIFY_LEFT, x, y, UI_BACKGROUND_COLOR); +} + const char *hp_taco_device::file_extensions() const { return "hti"; diff --git a/src/devices/machine/hp_taco.h b/src/devices/machine/hp_taco.h index 1695b7ce706..bcfb6bdcb7b 100644 --- a/src/devices/machine/hp_taco.h +++ b/src/devices/machine/hp_taco.h @@ -47,6 +47,7 @@ public: virtual bool call_load() override; virtual bool call_create(int format_type, option_resolution *format_options) override; virtual void call_unload() override; + virtual void call_display() override; virtual iodevice_t image_type() const override { return IO_MAGTAPE; } virtual bool is_readable() const override { return true; } virtual bool is_writeable() const override { return true; } @@ -71,96 +72,96 @@ protected: virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; private: - // Storage of tracks: mapping from a tape position to word stored there - typedef std::map tape_track_t; + // Storage of tracks: mapping from a tape position to word stored there + typedef std::map tape_track_t; - devcb_write_line m_irq_handler; - devcb_write_line m_flg_handler; - devcb_write_line m_sts_handler; + devcb_write_line m_irq_handler; + devcb_write_line m_flg_handler; + devcb_write_line m_sts_handler; - // Registers - UINT16 m_data_reg; - bool m_data_reg_full; - UINT16 m_cmd_reg; - UINT16 m_status_reg; - UINT16 m_tach_reg; - UINT16 m_checksum_reg; - UINT16 m_timing_reg; + // Registers + UINT16 m_data_reg; + bool m_data_reg_full; + UINT16 m_cmd_reg; + UINT16 m_status_reg; + UINT16 m_tach_reg; + UINT16 m_checksum_reg; + UINT16 m_timing_reg; - // State - bool m_irq; - bool m_flg; - bool m_sts; - UINT8 m_cmd_state; + // State + bool m_irq; + bool m_flg; + bool m_sts; + UINT8 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; + // 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; - emu_timer *m_hole_timer; + // Timers + emu_timer *m_tape_timer; + emu_timer *m_hole_timer; - // Content of tape tracks - tape_track_t m_tracks[ 2 ]; - bool m_image_dirty; + // Content of tape tracks + tape_track_t m_tracks[ 2 ]; + bool m_image_dirty; - // Reading & writing - bool m_tape_wr; - tape_pos_t m_rw_pos; - UINT16 m_next_word; - tape_track_t::iterator m_rd_it; - bool m_rd_it_valid; + // Reading & writing + bool m_tape_wr; + tape_pos_t m_rw_pos; + UINT16 m_next_word; + tape_track_t::iterator m_rd_it; + bool m_rd_it_valid; - // Gap detection - tape_pos_t m_gap_detect_start; + // Gap detection + tape_pos_t m_gap_detect_start; - typedef enum { - ADV_NO_MORE_DATA, - ADV_CONT_DATA, - ADV_DISCONT_DATA - } adv_res_t; + typedef enum { + ADV_NO_MORE_DATA, + ADV_CONT_DATA, + ADV_DISCONT_DATA + } adv_res_t; - void clear_state(void); - void irq_w(bool state); - void set_error(bool state); - unsigned speed_to_tick_freq(void) const; - bool pos_offset(tape_pos_t& pos , tape_pos_t offset) const; - void move_tape_pos(tape_pos_t delta_pos); - void update_tape_pos(void); - 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; - bool start_tape_cmd(UINT16 cmd_reg , UINT16 must_be_1 , UINT16 must_be_0); - void start_tape(UINT16 cmd_reg); - void stop_tape(void); - tape_track_t& current_track(void); - static tape_pos_t word_length(tape_word_t w); - static tape_pos_t word_end_pos(const tape_track_t::iterator& it); - static void adjust_it(tape_track_t& track , tape_track_t::iterator& it , tape_pos_t pos); - void write_word(tape_pos_t start , tape_word_t word , tape_pos_t& length); - void write_gap(tape_pos_t a , tape_pos_t b); - bool just_gap(tape_pos_t a , tape_pos_t b); - tape_pos_t farthest_end(const tape_track_t::iterator& it) const; - bool next_data(tape_track_t::iterator& it , tape_pos_t pos , bool inclusive); - 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); - 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); - void dump_sequence(tape_track_t::const_iterator it_start , unsigned n_words); - void save_tape(void); - bool load_track(tape_track_t& track); - bool load_tape(void); - void set_tape_present(bool present); - attotime time_to_next_hole(void) const; - attotime time_to_tach_pulses(void) const; - void start_cmd_exec(UINT16 new_cmd_reg); + void clear_state(void); + void irq_w(bool state); + void set_error(bool state); + 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; + void update_tape_pos(void); + 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; + 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); + static tape_pos_t word_length(tape_word_t w); + static tape_pos_t word_end_pos(const tape_track_t::iterator& it); + static void adjust_it(tape_track_t& track , tape_track_t::iterator& it , tape_pos_t pos); + void write_word(tape_pos_t start , tape_word_t word , tape_pos_t& length); + void write_gap(tape_pos_t a , tape_pos_t b); + bool just_gap(tape_pos_t a , tape_pos_t b); + tape_pos_t farthest_end(const tape_track_t::iterator& it) const; + bool next_data(tape_track_t::iterator& it , tape_pos_t pos , bool inclusive); + 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); + 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); + void dump_sequence(tape_track_t::const_iterator it_start , unsigned n_words); + void save_tape(void); + bool load_track(tape_track_t& track); + bool load_tape(void); + void set_tape_present(bool present); + attotime time_to_next_hole(void) const; + attotime time_to_tach_pulses(void) const; + void start_cmd_exec(UINT16 new_cmd_reg); }; // device type definition