SCSP User's Manual

Introduction

This manual describes the functions of the SCSP (Saturn Custom Sound Processor) processor and explains the sound system.

Manual structure

This manual consists of the following chapters, a table of contents with figures , and an index .

Chapter 1 Sound system configuration

1.1 Introduction

1.About Sega Saturn's sound block

2.About sound block composition

1.2 Starting the sound system

1. Starting up from reset

2.About reset vector

3. Regarding communication between main block and sound block

4.About MIDI communication function

5.About interrupts

1.3 About CD playback and SCSP

1. Regarding the connection between the CD side and “SCSP”

2. About CD-DA stereo playback method

Chapter 2 SCSP Overview

2.1 LSI overview

2.2 LSI specifications

2.3 SCSP chip block

Chapter 3 SCSP function

3.1 Interface

1.Sound CPU interface

2. Main CPU interface

3.2 Memory access control

Chapter 4 SCSP register

4.1 Register map

Control register by slot

SCSP control register

sound data stack

DSP control register

4.2 Sound source register

loop control register

EG register

FM modulation control register

When using the FM sound source method

volume register

PITCH register

LFO register

MIXER register

slot status register

sound memory configuration register

MIDI register

timer register

Interrupt control register

DMA transfer register

Chapter 5 Operation of DSP in SCSP

5.1 DSP configuration

5.2 RAM in DSP

explanation of words

Table of contents