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author Couriersud <couriersud@users.noreply.github.com>2008-01-08 20:48:35 +0000
committer Couriersud <couriersud@users.noreply.github.com>2008-01-08 20:48:35 +0000
commit9756e829825516f2f9d3d23290af08f9c1d894a8 (patch)
tree84addf55eef54591fa7ef60fe77b1860d34b2c85 /src
parente8be9779ee0826ee03c9cd72250a767e8cf481c2 (diff)
audio/dkong.c:
* fixed LS123 constant to match TI datasheet diode circuit constant
Diffstat (limited to 'src')
-rw-r--r--src/mame/audio/dkong.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mame/audio/dkong.c b/src/mame/audio/dkong.c
index 1da73dbef7a..4b9489a0a96 100644
--- a/src/mame/audio/dkong.c
+++ b/src/mame/audio/dkong.c
@@ -672,12 +672,12 @@ DISCRETE_SOUND_END
#define GND (0)
-/* KT = 0.33 for C>1uF, 0.25 else */
+/* KT = 0.25 for diode circuit, 0.33 else */
#define DISCRETE_LS123(_N, _T, _R, _C) \
- DISCRETE_ONESHOTR(_N, 0, _T, TTL_HIGH, (0.33 * (_R) * (_C) * (1.0+700./(_R))), DISC_ONESHOT_RETRIG | DISC_ONESHOT_REDGE)
+ DISCRETE_ONESHOTR(_N, 0, _T, TTL_HIGH, (0.25 * (_R) * (_C) * (1.0+700./(_R))), DISC_ONESHOT_RETRIG | DISC_ONESHOT_REDGE)
#define DISCRETE_LS123_INV(_N, _T, _R, _C) \
- DISCRETE_ONESHOTR(_N, 0, _T, TTL_HIGH, (0.33 * (_R) * (_C) * (1.0+700./(_R))), DISC_ONESHOT_RETRIG | DISC_ONESHOT_REDGE | DISC_OUT_ACTIVE_LOW)
+ DISCRETE_ONESHOTR(_N, 0, _T, TTL_HIGH, (0.25 * (_R) * (_C) * (1.0+700./(_R))), DISC_ONESHOT_RETRIG | DISC_ONESHOT_REDGE | DISC_OUT_ACTIVE_LOW)
#define DISCRETE_BITSET(_N, _N1, _B) DISCRETE_TRANSFORM3(_N, 1, _N1, 1 << ((_B)-1), 0, "01&2>")
#define DISCRETE_ENERGY_NAND(_N, _E, _N1, _N2) DISCRETE_TRANSFORM3(_N, _E, _N1, _N2, 1, "201*-")