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*-")