diff options
Diffstat (limited to 'src/mame/audio/laserbat.cpp')
-rw-r--r-- | src/mame/audio/laserbat.cpp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/mame/audio/laserbat.cpp b/src/mame/audio/laserbat.cpp index 4efcfee9c9b..5d336fdd851 100644 --- a/src/mame/audio/laserbat.cpp +++ b/src/mame/audio/laserbat.cpp @@ -36,24 +36,24 @@ WRITE8_MEMBER(laserbat_state_base::csound2_w) The Laser Battle/Lazarian sound board has a SN76477 CSG, two TMS3615 tone synthesisers, and a TDA1010 power amplifier. It receives commands from the game board over a 16-bit unidirectional data bus. - The CPU cannot write all sixteen lines atomically, it write to lines - 1-8 as one group and 9-16 as another group. + The CPU cannot write all sixteen lines atomically, it writes to + lines 1-8 as one group and 9-16 as another group. - The game board makes the the audio output from the first S2636 PVI - (5E) available on a pin at the sound board interface connector, but - it isn't routed anywhere, so you won't hear it. + The game board makes the audio output from the first S2636 PVI (5E) + available on a pin at the sound board interface connector, but it + isn't routed anywhere, so you won't hear it. The TMS3615 at 05 is clocked at 250kHz (4MHz crystal oscillator divided by 16), and its divide-by-two output is used to clock the TMS3615 at 04. This gives a base 16' note of C3. The combined 8' - or 16' outputs are selectable by jumper, allowing board to be + or 16' outputs are selectable by jumper, allowing the board to be switched between two octaves. There's no indication of which octave would have been selected in the Lazarian manual. There's a filter network between the TMS3615 outputs and the power amplifier with several parameters controllable from the game board. - The audio output of the SN76477 isn't actually used. Rather the + The audio output of the SN76477 isn't actually used. Rather, the signal from before the output amplifier is taken and used to gate distortion elements in the analog filter network. |