diff options
author | Ivan Vangelista <mesgnet@yahoo.it> | 2021-08-12 07:00:47 +0200 |
---|---|---|
committer | GitHub <noreply@github.com> | 2021-08-12 07:00:47 +0200 |
commit | b5926fe24f762e3e9a9cc3e23401443d8904ed86 (patch) | |
tree | 21d1e107f4cce9d00154d7b86be4a29cd9caea98 | |
parent | 79e4e21eaea2206dfd99dab50031c806a54cc9e0 (diff) |
audio/mw8080bw.cpp: added some notes deriving from comparison between driver and original Taito Space Invaders PCB [Guru]
-rw-r--r-- | src/mame/audio/mw8080bw.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/mame/audio/mw8080bw.cpp b/src/mame/audio/mw8080bw.cpp index ca5f90b22c9..301a335d010 100644 --- a/src/mame/audio/mw8080bw.cpp +++ b/src/mame/audio/mw8080bw.cpp @@ -324,7 +324,7 @@ discrete_op_amp_1sht_info const invaders_missle_1sht = RES_M(1), // R31 RES_M(1), // R33 RES_M(2.2), // R34 - CAP_U(1), // C12 + CAP_U(1), // C12, CAP_U(0.22) on Taito PCB CAP_P(470), // C15 0, // vN 12 // vP @@ -344,14 +344,14 @@ discrete_op_amp_info const invaders_missle_op_amp_B3 = discrete_op_amp_osc_info const invaders_missle_op_amp_osc = { - DISC_OP_AMP_OSCILLATOR_VCO_3 | DISC_OP_AMP_IS_NORTON | DISC_OP_AMP_OSCILLATOR_OUT_SQW, + DISC_OP_AMP_OSCILLATOR_VCO_3 | DISC_OP_AMP_IS_NORTON | DISC_OP_AMP_OSCILLATOR_OUT_SQW, // DISC_OP_AMP_OSCILLATOR_VCO_3 doesn't fully represent the actual circuit on a Taito PCB, missile sound is off 1.0 / (1.0 / RES_M(1) + 1.0 / RES_K(330)) + RES_M(1.5), // R29||R11 + R12 RES_M(1), // R16 RES_K(560), // R17 RES_M(2.2), // R19 RES_M(1), // R16 RES_M(4.7), // R14 - RES_M(3.3), // R13 + RES_M(3.3), // R13, RES_M(2.2) on Taito PCB 0, // no r8 CAP_P(330), // C58 12, // vP |