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Creative SB0350 Hardware Programming Guide - Page 38

Creative SB0350 Manual

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Digitized Sound I/O Programming 3-9 The tables below list the sampling ranges for the supported DMA modes among the various DSP versions. Normal on the "Transfer Mode" column refers to non highspeed DMA mode. You must take note of the information below when programming for the different versions of the DSP. Digitized Sound Output Capability DSP Version 4.xx Transfer Mode Mono/Normal Mono/Normal Stereo/Normal Stereo/Normal Mono/Normal Mono/High-Speed Stereo/High-Speed Mono/Normal Mono/High-Speed Mono/Normal Mono/Normal Mono/Normal Mono/Normal Data Format 8-bit unsigned 16-bit signed 8-bit unsigned 16-bit signed 8-bit unsigned 8-bit unsigned 8-bit unsigned 8-bit unsigned 8-bit unsigned 8-bit unsigned 8 bit to 4 bit ADPCM 8 bit to 3 bit ADPCM 8 bit to 2 bit ADPCM Sampling Range 5000 to 44100 Hz 5000 to 44100 Hz 5000 to 44100 Hz 5000 to 44100 Hz 4000 to 23000 Hz 23000 to 44100 Hz 11025 and 22050 Hz 4000 to 23000 Hz 23000 to 44100 Hz 4000 to 23000 Hz 4000 to 12000 Hz 4000 to 13000 Hz 4000 to 11000 Hz 3.xx 2.01+ 2.00 and 1.xx All All All Table 3-2: Digitized Sound Output Capabilities

Section	Page
Introduction	8
What You Should Know	9
Scope and Manual Organization	9
Document Conventions	10
Determining User's Sound Blaster Card	12
Determining User's Card Settings	13
Chapter 1 - Hardware Overview	14
Anatomy of Sound Blaster Family of Audio Cards	15
Digital Sound Processor Chip	15
Mixer Chip	16
FM Synthesizer Chip	16
Bus Interface Chip	17
Advanced Signal Processor Chip	17
Block Diagrams for Sound Blaster Family of Audio Cards	19
Chapter 2 - Introduction to DSP Programming	23
DSP I/O Addresses	24
Resetting DSP	24
Reading from DSP	25
Writing to DSP	26
Handling Interrupts from DSP	26
Sharing of Interrupts	27
Configuring DMA and Interrupt Settings	28
Chapter 3 - Digitized Sound I/O Programming	30
Digitized Sound Operation Modes	31
Digitized Sound Data Format	31
Digitized Sound I/O Transfer Rate	33
Direct Mode	33
Single-cycle DMA Mode	34
Auto-initialize DMA Mode	34
High-Speed DMA Mode	35
ADPCM DMA mode	36
DSP Digitized Sound I/O Capability	37
Digitized Sound Input Capability	39
Sample Procedures	40
General Procedures for a DMA mode Transfer	41
Handling the DSP Digitized Sound I/O Interrupt	41
Chapter 4 - Mixer Chip Programming	59
Programming Sequence	60
CT1335 Mixer	62
Features	62
Register Functions	62
CT1345 Mixer	64
Features	64
Register Functions	65
CT1745 Mixer	68
Features	68
Register Functions	69
Chapter 5 - MIDI Port I/O Programming	76
SB-MIDI Mode	77
I/O Addresses	77
Sending MIDI Data	78
Reading MIDI Data	79
MPU-401 UART Mode	80
I/O Addresses	80
Checking the Status	81
Sending a Command	82
Sending MIDI Data	85
Reading MIDI Data	85
Chapter 6 - DSP Commands	86
Commands by Category	87
Command Descriptions	90
Appendix A - Sound Blaster I/O Address Maps	115
SB1.5 I/O Address Map	116
SBMCV I/O Address Map	117
SB2.0 I/O Address Map	118
SB2CD I/O Address Map	119
SBPRO I/O Address Map	120
SBPRO MCV I/O Address Map	122
SB16 I/O Address Map	123
Appendix B - File Format	125
Creative Voice File (VOC) Format	126
Header Block	126
Data Block	127
Creative ADPCM Wave Type Format	136
Appendix C - Relevant Information	137