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swim2: Correct writing

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floppy: Correct index duration (2ms, not 20us) and polarity in superdrive
This commit is contained in:
Olivier Galibert 2021-03-06 13:21:12 +01:00
parent 25d91e9762
commit b310c8ff63
2 changed files with 5 additions and 4 deletions
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8
src/devices/imagedev/floppy.cpp
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@ -800,10 +800,10 @@ void floppy_image_device::index_resync()
}
int position = int(delta.as_double()*angular_speed + 0.5);
int new_idx = position < 20000;
int new_idx = position < 2000000;
if(new_idx) {
attotime index_up_time = attotime::from_double(20000/angular_speed);
attotime index_up_time = attotime::from_double(2000000/angular_speed);
index_timer->adjust(index_up_time - delta);
} else
index_timer->adjust(rev_time - delta);
@ -2631,8 +2631,8 @@ bool mac_floppy_device::wpt_r()
return !dskchg;
case 0x4:
case 0xc: // Index pulse, probably only on the superdrive though
return !m_has_mfm ? false : !image || mon ? true : idx;
case 0xc: // Index pulse, probably only in mfm mode and while writing though
return !m_has_mfm ? false : !image || mon ? true : !idx;
case 0x5: // Is it a superdrive (supports 1.4M MFM) ?
return m_has_mfm;

1
src/devices/machine/swim2.cpp
View File

@ -111,6 +111,7 @@ void swim2_device::flush_write(u64 when)
m_flux_write_count = 0;
if(last_on_edge)
m_flux_write[m_flux_write_count++] = when;
m_flux_write_start = when;
} else
m_flux_write_count = 0;
}