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mu100: Some comments

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This commit is contained in:
Olivier Galibert 2023-10-21 12:49:11 +02:00
parent a918191440
commit d1cd540e7d
2 changed files with 7 additions and 2 deletions
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2
src/devices/sound/swp30.cpp
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@ -33,7 +33,7 @@ static int scount = 0;
per-channel values for AWM2, but parts are isolated and renumbered
for MEG regisrers or for general control functions.
Names we'll use in th rest of the text:
Names we'll use in the rest of the text:
- reg(y, x) is the register at address 2*(y*0x40 + x)
- ch<nn> is reg(channel, nn) for a given AWG2 channel
- sy<nn> is reg(nn/2, 0xe + (nn % 2))

7
src/mame/yamaha/ymmu100.cpp
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@ -2,9 +2,14 @@
// copyright-holders:R. Belmont, Olivier Galibert
/*************************************************************************************
Yamaha MU-80 and MU-100 : 32-voice polyphonic/multitimbral General MIDI/GS/XG tone modules
Yamaha MU-100 : 32-part, 64-voice polyphonic/multitimbral General MIDI/GS/XG
tone module
Preliminary driver by R. Belmont and O. Galibert
The successor to the mu90, uses the same one-chip SWP30 with a better sample rom.
Exists in rackable (mu100r) and screenless (mu100b), and single board (xt446)
variants.
MU100 CPU: Hitachi H8S/2655 (HD6432655F), strapped for mode 4 (24-bit address, 16-bit data, no internal ROM)
Sound ASIC: Yamaha XS725A0/SWP30
RAM: 1 MSM51008 (1 meg * 1 bit = 128KBytes)