diff options
author | couriersud <couriersud@gmx.org> | 2020-09-27 13:20:58 +0200 |
---|---|---|
committer | couriersud <couriersud@gmx.org> | 2020-09-27 13:21:32 +0200 |
commit | 81c484197b85d72717f310b1a828fb44016a6382 (patch) | |
tree | dc878267d4d104f1cacbc2027c66696f12f2206d /src/mame/audio | |
parent | e996e148f38b9603e634517128cd0a4d5eb4eb94 (diff) |
netlist: Fix astro blaster sonar sound
* Also fix two singular matrices being created.
Diffstat (limited to 'src/mame/audio')
-rw-r--r-- | src/mame/audio/nl_astrob.cpp | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/src/mame/audio/nl_astrob.cpp b/src/mame/audio/nl_astrob.cpp index 8ff80c77c2f..ac2f03295ab 100644 --- a/src/mame/audio/nl_astrob.cpp +++ b/src/mame/audio/nl_astrob.cpp @@ -96,7 +96,7 @@ NETLIST_START(astrob) PARAM(Solver.Solver_54.DYNAMIC_MIN_TIMESTEP, 4e-6) // gets rid of NR loops failure #else #if !(ENABLE_SONAR_ALT) - PARAM(Solver.Solver_42.DYNAMIC_MIN_TIMESTEP, 6e-6) // gets rid of NR loops failure + PARAM(Solver.Solver_41.DYNAMIC_MIN_TIMESTEP, 6e-6) // gets rid of NR loops failure #endif #endif #else @@ -479,7 +479,7 @@ NETLIST_START(astrob) Q_2N4403(Q1) Q_2N4403(Q2) Q_2N4403(Q3) - Q_2N4093(Q4) + //Q_2N4093(Q4) // avoid singular matrix being created Q_2N4093(Q5) Q_2N4093(Q6) Q_2N4403(Q7) @@ -691,13 +691,31 @@ NETLIST_START(astrob) NET_C(C40.2, R93.1, U2.9) NET_C(U2.10, GND) + NET_C(R5.1, R40.1, R114.1, Q3.B, R95.1, R66.1) + #if (ENABLE_SONAR_ALT) + // The oscillators need a small offset voltage to start oscillating. + // Without frontiers I assume the offset voltage is created due to the + // slight differences in resistor values in the four (now connected) + // oscillators. + + ANALOG_INPUT(I_VOFF, 0.1) + RES(RDUM1, RES_M(1)) + RES(RDUM2, RES_M(1)) + RES(RDUM3, RES_M(1)) + RES(RDUM4, RES_M(1)) + NET_C(R5.2, RDUM1.1) + NET_C(R40.2, RDUM2.1) + NET_C(R95.2, RDUM3.1) + NET_C(R66.2, RDUM4.1) + + NET_C(RDUM1.2, RDUM2.2, RDUM3.2, RDUM4.2, I_VOFF) + OPTIMIZE_FRONTIER(R5.2, RES_K(68), 192) OPTIMIZE_FRONTIER(R40.2, RES_K(68), 192) OPTIMIZE_FRONTIER(R95.2, RES_K(68), 192) OPTIMIZE_FRONTIER(R66.2, RES_K(68), 192) #endif - NET_C(R5.1, R40.1, R114.1, Q3.B, R95.1, R66.1) #endif NET_C(R114.2, GND) @@ -1183,6 +1201,7 @@ NETLIST_START(astrob) // // Unconnected outputs // + NET_C(GND, U7.7, U7.14) // avoid singular matrices #if (ENABLE_FRONTIERS) #define RXX 192 |