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(MESS) ti99: MFM hard disk emulation WIP (nw)

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This commit is contained in:
Michael Zapf 2015-04-20 12:53:53 +02:00
parent 81915bfadc
commit 73ad0b3169
2 changed files with 13 additions and 8 deletions
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8
src/emu/bus/ti99_peb/hfdc.c
View File

@ -510,8 +510,8 @@ void myarc_hfdc_device::floppy_index_callback(floppy_image_device *floppy, int s
*/
void myarc_hfdc_device::harddisk_index_callback(mfm_harddisk_device *harddisk, int state)
{
/* if (TRACE_LINES) */ if (state==1) logerror("%s: HD seek complete\n", tag());
set_bits(m_status_latch, HDC_DS_SKCOM, (state==ASSERT_LINE));
/* if (TRACE_LINES) */ if (state==1) logerror("%s: HD index pulse\n", tag());
set_bits(m_status_latch, HDC_DS_INDEX, (state==ASSERT_LINE));
signal_drive_status();
}
@ -520,8 +520,8 @@ void myarc_hfdc_device::harddisk_index_callback(mfm_harddisk_device *harddisk, i
*/
void myarc_hfdc_device::harddisk_skcom_callback(mfm_harddisk_device *harddisk, int state)
{
/* if (TRACE_LINES) */ if (state==1) logerror("%s: HD index pulse\n", tag());
set_bits(m_status_latch, HDC_DS_INDEX, (state==ASSERT_LINE));
/* if (TRACE_LINES) */ if (state==1) logerror("%s: HD seek complete\n", tag());
set_bits(m_status_latch, HDC_DS_SKCOM, (state==ASSERT_LINE));
signal_drive_status();
}

13
src/emu/machine/ti99_hd.c
View File

@ -117,6 +117,7 @@ void mfm_harddisk_device::device_timer(emu_timer &timer, device_timer_id id, int
// Start the settle timer
m_step_phase = STEP_SETTLE;
m_seek_timer->adjust(attotime::from_usec(16800));
logerror("%s: Arrived at target track %d, settling ...\n", tag(), m_current_cylinder);
}
break;
case STEP_SETTLE:
@ -125,6 +126,7 @@ void mfm_harddisk_device::device_timer(emu_timer &timer, device_timer_id id, int
else
{
// Seek completed
logerror("%s: Settling done at cylinder %d, seek complete\n", tag(), m_current_cylinder);
m_seek_complete = true;
m_seek_complete_cb(this, ASSERT_LINE);
m_step_phase = STEP_COLLECT;
@ -136,8 +138,11 @@ void mfm_harddisk_device::device_timer(emu_timer &timer, device_timer_id id, int
void mfm_harddisk_device::head_move()
{
int disttime = m_track_delta*200;
if (disttime < 0) disttime = -disttime;
int steps = m_track_delta;
if (steps < 0) steps = -steps;
logerror("%s: Moving head by %d step(s) %s\n", tag(), steps, (m_track_delta<0)? "outward" : "inward");
int disttime = steps*200;
m_step_phase = STEP_MOVING;
m_seek_timer->adjust(attotime::from_usec(disttime));
// We pretend that we already arrived
@ -208,10 +213,10 @@ void mfm_harddisk_device::step_w(line_state line)
m_seek_complete_cb(this, CLEAR_LINE);
}
logerror("%s: Got seek pulse; distance %d, direction %s\n", tag(), m_track_delta, m_seek_inward? "inward" : "outward");
// Counter will be adjusted according to the direction (+-1)
m_track_delta += (m_seek_inward)? +1 : -1;
if (m_track_delta < 0 || m_track_delta > 670)
logerror("%s: Got seek pulse; track delta %d\n", tag(), m_track_delta);
if (m_track_delta < -670 || m_track_delta > 670)
{
logerror("%s: Excessive step pulses - doing auto-truncation\n", tag());
m_autotruncation = true;