Nuked SC-55

Roland SC-55mkII emulator, by nukeykt.

Special thanks:

John McMaster: SC-55 PCM chip decap.
org/ogamespec: deroute tool.
SDL team.
Wohlstand: linux/macos port.
mattw

Status

3 ICs are needed to be emulated:

Roland PCM chip
Hitachi H8/532 MCU
Mitsubishi M37450M2 MCU

MCUs are emulated using info from their datasheets. PCM chip info is derived from analyzing decapped chip.

PCM chip tracing progress

MCU emulation progress

Install

Put SC-55mkII firmware image into the same folder as Nuked SC-55. Files should be names as such:

R15199858 (H8/532 mcu) -> rom1.bin
R00233567 (H8/532 extra code) -> rom2.bin
R15199880 (M37450M2 mcu) -> rom_sm.bin
R15209359 (WAVE 16M) -> waverom1.bin
R15279813 (WAVE 8M) -> waverom2.bin

License

Nuked SC-55 can be distributed and used under the original MAME license (see LICENSE file). Non-commercial license was chosen to prevent making and selling SC-55 emulation boxes using (or around) this code, as well as preventing from using it in the commercial music production.

Additional info

Nuked SC-55 will listen to the specified MIDI IN port (default is port 0). Use '-p:<port_number>' command line argument to specify port number. To use it with the other applications use external MIDI pipe software (e.g. loopMIDI).
SC-55mkII buttons are mapped as such (currently hardcoded):

Q -> POWER
W -> INST ALL
E -> INST MUTE
R -> PART L
T -> PART R
Y -> INST L
U -> INST R
I -> KEY SHIFT L
O -> KEY SHIFT R
P -> LEVEL L
LEFTBRACKET  -> LEVEL R
A -> MIDI CH L
S -> MIDI CH R
D -> PAN L
F -> PAN R
G -> REVERB L
H -> REVERB R
J -> CHORUS L
K -> CHORUS R
LEFT -> PART L
RIGHT -> PART R

Due to a bug in the SC-55mkII's firmware, some parameters don't reset properly on startup. Do GM, GS or MT-32 reset using buttons to fix this issue.

ihmin / Nuked-SC55