Jun 29, 2022 · The SPC700 is a Sony coprocessor that coordinates SNES audio. Once it is initialized with data and code sent from the SNES CPU, it manipulates the state of its accompanying digital signal processor (DSP), which produces the output audio.

4 8-bit I/O ports to transfer data to/from the SNES. 8x channels of ADPCM compressed sample goodness. The DSP also has special hardware for echo effects, white noise, and pitch modulation. Two 8-bit 8KHz timers + one more 8-bit 64KHz timer, all have 4-bit count-up values. * Only if X bit is set in the undocumented register.

Mar 4, 2024 · The Sony SPC-700 CPU is part of the S-SMP sound processor of the SNES. It runs at 1.024 MHz, and behaves similarly to a 6502 with some extensions. The SPC-700 has a 16-bit address space, and a similar set of registers to the 6502. YA - 16-bit pair of A (lsb) and Y (msb).

The "SNES SPC700 Player" is a very simple SPC player for Windows based on SNESAPU. For more information about this software, please see the wiki page.

Ever wondered how the SNES's audio subsystem, the SPC700, produced all the beautiful music and sounds in all of those SNES classics? It's all explained right here.

Apr 16, 2020 · SPC files contain the state of the SPC700, typically at the very beginning of a song in an SNES game. By restoring the state in an SPC700 and DSP emulator -- a.k.a. an SPC player -- you can listen to the song without the SNES ROM.

The SPC700 runs at a whole 1.024MHz, has six internal registers, and can execute 256 opcodes. Obviously it's not as powerful as the computers of today, but in and of itself it's quite capable of performing many tasks.

The Initial Program Loader Boot ROM, or IPL ROM, is the very first program executed by the SPC700 on power on. It clears memory locations $00-$EF, then once it does so, it sends a signal to the SNES through two of the CPUIO registers. $0000-$0001 are reserved to hold the pointer, but all other memory locations can be written to.

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The SNES comes with its own processor for audio, the SPC700. It runs completely separate from the 65816. It is clocked at around 1 MHz (we will be more precise on that in a later chapter on synching components).