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author Olivier Galibert <galibert@pobox.com>2022-04-24 12:44:37 +0200
committer Olivier Galibert <galibert@pobox.com>2022-04-27 12:18:04 +0200
commit623e248524a0ae8330606bbef108aa416b5cf85c (patch)
treeb008c10aa660e76d76ae4a41d8f7e5f1a2dabd5a /src/devices/machine/iwm.h
parent1b3081129da5927c5f594022f664118a02840265 (diff)
iwm: Do a complete clock change on sync write for better flux change time precision
iwm: Increate the flux write buffer size for better performance (complete sector write in a single call) 2gs: Correct the q3 clock value, making (sync) writes reliable
Diffstat (limited to 'src/devices/machine/iwm.h')
-rw-r--r--src/devices/machine/iwm.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/devices/machine/iwm.h b/src/devices/machine/iwm.h
index 5bae4443791..c4f13c09e6d 100644
--- a/src/devices/machine/iwm.h
+++ b/src/devices/machine/iwm.h
@@ -62,19 +62,18 @@ private:
double m_q3_fclk_ratio, m_fclk_q3_ratio;
u64 m_last_sync, m_next_state_change, m_sync_update, m_async_update;
u64 m_flux_write_start;
- std::array<u64, 16> m_flux_write;
+ std::array<u64, 65536> m_flux_write;
u32 m_flux_write_count;
u32 m_q3_clock;
int m_active, m_rw, m_rw_state;
u8 m_data, m_whd, m_mode, m_status, m_control, m_rw_bit_count;
u8 m_rsh, m_wsh;
u8 m_devsel;
+ bool m_q3_clock_active;
u8 control(int offset, u8 data);
u64 time_to_cycles(const attotime &tm) const;
attotime cycles_to_time(u64 cycles) const;
- u64 fclk_to_q3(u64 cycles) const;
- u64 q3_to_fclk(u64 cycles) const;
void mode_w(u8 data);
void data_w(u8 data);
@@ -82,9 +81,10 @@ private:
u64 window_size() const;
u64 half_window_size() const;
u64 read_register_update_delay() const;
- u64 write_sync_half_window_size() const;
inline bool is_sync() const;
void flush_write(u64 when = 0);
+ void write_clock_start();
+ void write_clock_stop();
};
DECLARE_DEVICE_TYPE(IWM, iwm_device)