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Diffstat (limited to 'src/mame/audio/nl_zac1b11142.cpp')
-rw-r--r--src/mame/audio/nl_zac1b11142.cpp8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/mame/audio/nl_zac1b11142.cpp b/src/mame/audio/nl_zac1b11142.cpp
index 0d2f8c2cc64..6e716788a3f 100644
--- a/src/mame/audio/nl_zac1b11142.cpp
+++ b/src/mame/audio/nl_zac1b11142.cpp
@@ -196,13 +196,15 @@ NETLIST_START(zac1b11142_schematics)
RES(R112, RES_K(100))
RES(R113, RES_M(1))
LM3900(U5B1)
+ TTL_74LS14_GATE(U4A1)
NET_C(ANAL5, R66.1, R67.1)
NET_C(R67.2, C28.1, R40.1, T7.B)
NET_C(R64.2, T6.C, U3A.3)
- NET_C(R65.2, U3A.2, U3A.4, U3A.1) // FIXME: pin 1 actually comes from a Schmitt trigger in U4A
+ NET_C(R65.2, U3A.2, U3A.4)
+ NET_C(U3A.1, U4A1.Q)
NET_C(U3A.5, R39.1, U5D.13)
- NET_C(R39.2, C37.1) // FIXME: this junction feeds a Schmitt trigger in U4A
+ NET_C(U4A1.A, R39.2, C37.1)
NET_C(R109.1, R94.2, R108.1, R95.1)
NET_C(R109.2, LEVELT)
NET_C(R110.2, R112.1, R111.1)
@@ -210,7 +212,7 @@ NETLIST_START(zac1b11142_schematics)
NET_C(R95.2, U5B1.PLUS)
NET_C(U5D.2, C50.2, R113.2, U5B1.OUT, R96.1)
NET_C(VCC, R64.1, R65.1, R94.1, R110.1, U5B1.VP)
- NET_C(GND, R66.2, C28.2, R40.2, T6.E, C37.2, R108.2, R111.2, U5B1.VM)
+ NET_C(GND, R66.2, C28.2, R40.2, T6.E, C37.2, R108.2, R111.2, U5B1.VM, U4A1.GND)
ALIAS(TROMBA, R96.2)