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author Vas Crabb <vas@vastheman.com>2019-03-26 11:13:37 +1100
committer Vas Crabb <vas@vastheman.com>2019-03-26 11:13:37 +1100
commit97b67170277437131adf6ed4d60139c172529e4f (patch)
tree7a5cbf608f191075f1612b1af15832c206a3fe2d /src/devices/machine/tms9901.h
parentb380514764cf857469bae61c11143a19f79a74c5 (diff)
(nw) Clean up the mess on master
This effectively reverts b380514764cf857469bae61c11143a19f79a74c5 and c24473ddff715ecec2e258a6eb38960cf8c8e98e, restoring the state at 598cd5227223c3b04ca31f0dbc1981256d9ea3ff. Before pushing, please check that what you're about to push is sane. Check your local commit log and ensure there isn't anything out-of-place before pushing to mainline. When things like this happen, it wastes everyone's time. I really don't need this in a week when real work™ is busting my balls and I'm behind where I want to be with preparing for MAME release.
Diffstat (limited to 'src/devices/machine/tms9901.h')
-rw-r--r--src/devices/machine/tms9901.h15
1 files changed, 12 insertions, 3 deletions
diff --git a/src/devices/machine/tms9901.h b/src/devices/machine/tms9901.h
index 86a2c6852e3..eda01f253ad 100644
--- a/src/devices/machine/tms9901.h
+++ b/src/devices/machine/tms9901.h
@@ -60,8 +60,11 @@ public:
DECLARE_WRITE_LINE_MEMBER( rst1_line );
- DECLARE_READ8_MEMBER( read );
- DECLARE_WRITE8_MEMBER( write );
+ // Synchronous clock input
+ DECLARE_WRITE_LINE_MEMBER( phi_line );
+
+ uint8_t read(offs_t offset);
+ void write(offs_t offset, uint8_t data);
auto p_out_cb(int n) { return m_write_p[n].bind(); }
auto read_cb() { return m_read_block.bind(); }
@@ -83,6 +86,9 @@ private:
// Common method for device_reset and rst1_line
void do_reset();
+ // Common clock handling
+ void clock_in(line_state clk);
+
// State of the INT1-INT15 lines (must be inverted when queried)
// Note that the levels must also be delivered when reading the pins, which
// may require to latch the int levels.
@@ -93,6 +99,9 @@ private:
bool m_int_pending; // status of the int* pin (connected to TMS9900)
bool m_timer_int_pending; // timer int pending (overrides int3 pin if timer enabled)
+ bool m_clock_active;
+ int m_clockdiv; // Clock divider counter (for synchronous clock)
+
// PIO registers
int m_pio_direction; // direction register for PIO
@@ -110,7 +119,7 @@ private:
// true = clock mode (read/write clock interval)
bool m_clock_mode;
- // MESS timer, used to emulate the decrementer register
+ // Timer, used to emulate the decrementer register
emu_timer *m_decrementer;
// clock interval, loaded in decrementer when it reaches 0.