diff options
author | 2019-12-10 23:47:13 +0100 | |
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committer | 2019-12-10 23:49:05 +0100 | |
commit | ed2f586df867ea2e999107c018c681d23fb2d3a4 (patch) | |
tree | f0f4607d0d0d3b32ef0e9a795912176f944d26bb /src/devices/sound/sn76496.h | |
parent | f7762a550209208a7aaecc5090ccaf5360d8a835 (diff) |
Using an emu_timer to control the READY line.
Diffstat (limited to 'src/devices/sound/sn76496.h')
-rw-r--r-- | src/devices/sound/sn76496.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/devices/sound/sn76496.h b/src/devices/sound/sn76496.h index cd7b4a6c509..07fb3a47932 100644 --- a/src/devices/sound/sn76496.h +++ b/src/devices/sound/sn76496.h @@ -23,7 +23,6 @@ class sn76496_base_device : public device_t, public device_sound_interface { public: auto ready_cb() { return m_ready_handler.bind(); } - void stereo_w(u8 data); void write(u8 data); DECLARE_READ_LINE_MEMBER( ready_r ) { return m_ready_state ? 1 : 0; } @@ -51,10 +50,9 @@ protected: private: inline bool in_noise_mode(); void register_for_save_states(); - void countdown_cycles(); + void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; bool m_ready_state; - devcb_write_line m_ready_handler; sound_stream* m_sound; @@ -78,7 +76,8 @@ private: int32_t m_period[4]; // Length of 1/2 of waveform int32_t m_count[4]; // Position within the waveform int32_t m_output[4]; // 1-bit output of each channel, pre-volume - int32_t m_cycles_to_ready; // number of cycles until the READY line goes active + + emu_timer *m_ready_timer; }; // SN76496: Whitenoise verified, phase verified, periodic verified (by Michael Zapf) |