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c140: Update comments (nw)

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AJR 2019-10-15 22:08:43 -04:00
parent e5cceda218
commit a08fb6b38d
1 changed files with 1 additions and 6 deletions
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src/devices/sound/c140.cpp
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@ -10,12 +10,7 @@ This chip controls 24 channels (C140) or 16 (219) of PCM.
16 bytes are associated with each channel. 16 bytes are associated with each channel.
Channels can be 8 bit signed PCM, or 12 bit signed PCM. Channels can be 8 bit signed PCM, or 12 bit signed PCM.
Timer behavior is not yet handled. TODO: What does the INT0 pin do? Normally Namco tied it to VOL0 (with VOL1 = VCC).
Unmapped registers:
0x1f8:timer interval? (Nx0.1 ms)
0x1fa:irq ack? timer restart?
0x1fe:timer switch?(0:off 1:on)
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