Table of Contents: | Mega-CD Outline |
| Mega-CD Hardware | Mega-CD Technical Bulletins
| Mega-CD PCM Sound | Cinepak Technical Bulletins
| Mega-CD Software Development | Addendum
| Mega-CD Disc Format | Software Standards
| Mega-CD Bios | Misc

Mega CD Outline
Title Page
Table of Contents
*

I | Explanation of Terms | page 2, 3
II | Hardware Specifications | page 4
| (1) Mega-CD | page 4
| (2) Genesis | page 4
III | Internal Configuration | page 5
| (1) Configuration Diagram | page 5
| (2-1) Genesis | page 5
| (2-2) Mega-CD | page 6
| (3) Using the 6 Megabit Buffer | page 7
| (3-1) PRG-RAM (4M) | page 7
| (3-2) Word RAM (2M) | page 7
| (3-2-1) 2 M Mode | page 7
| (3-2-2) 1 M/1 M Mode | page 8
IV | Detailed Description of Functions | page 9
| (1) Twin CPUs | page 9
| (2) Graphical Numeric Processing Functions | page 10
| (2-1) Coordinate Conversion Function | page 10
| (2-1-1) Basic Principle | page 10
| (2-1-2) Rotation | page 11
| (2-1-3) Enlargement/Reduction | page 12
| (2-1-4) 3-D Effect | page 12
| (2-2) Full Graphics Function | page 12
| (2-3) Important Points About Both Functions | page 13
| (3) Audio Functions | page 14
| (3-1) CD-DA | page 14
| (3-2) 8-channel Stereo PCM Sound Source | page 14 , 15
| (3-3) 8-times Oversampling Digital Filter | page 16
| (3-4) Fade-In/Out | page 16
| (4) Appendices | page 17
| (4-1) Moving Picture Processing Capability | page 17
| (4-2) Sound | page 17 , 18
| (4-3) Access Time | page 19
| (4-4) CD-G Compatibility | page 19

Mega CD Hardware Manual: The Hardware
Title Page
Table of Contents - page 1
Table of Contents - page 2
Table of Contents - page 3
Mega-CD Diagram Mega-CD Diagram (horizontal)
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Terms Used In This Manual | page 1, 2, 3
Outline Of Mega-CD Hardware - page missing | page 4
Mega-CD Construction | page 5
Bus Contruction Of CD-ROM Interior | page 6, 7, 8 , 9, 10, 11
Mega-CD Hardware Specifications | page 12

1 | Mapping | page 12
| 1-1 Mapping Mode | page 12. 13
| 1-2 Sub-CPU Mapping | page 14, 15
| 1-3 Main-CPU Mapping | page 16, 17, 18
2 | Mega-CD Register Table | page 19, 20, 21
3 | Sub-CPU Registers | page 22
| 3-1 Initialization | page 22, 23, 24 , 25
| 3-2 CDC | page 26, 27
| 3-3 Communication | page 28, 29
| 3-4 General Purpose Timer | page 30
| 3-5 Interrupt | page 30
| 3-6 CDD | page 31, 32, 33
| 3-7 Color Numeric Operation | page 34
| 3-8 Rotation Scaling | page 35, 36, 37 , 38, 39, 40, 41 , 42, 43,
|  | 44, 46, 47, 48, 49 , 50, 51, 52, 53 , 54
| 3-9 Sub-Code | page 55
4 | Main-CPU Registers | page 56
| 4-1 Initialization | page 56, 57
| 4-2 CDC | page 58, 59
| 4-3 Communication | page 59, 60
| Supplements | page 61, 62, 63

Mega CD Hardware Manual: PCM Sound Source
Title Page
Table of Contents
*

1 | Overview Of The Product | page 1
2 | Block Diagram | page 2, (horizontal)
3 | Description Of Pins | page 3, 4, 5
4 | Description Of Functions | page 6
| 4-1 Address Map | page 6
| 4-2 Control Register | page 7, 8
| 4-3 Internal Memory | page 9, 10
| 4-4 Channel On/Off Register | page 10
| 4-5 Microcomputer Interface IC | page 11
| 4-6 Wave Memory Interface IC | page 11
| 4-7 Internal Register Read Cycle | page 12
| 4-8 DCA (Digital Control Amplifier) | page 13
| 4-9 Wave Data Format | page 14
5 | DC Electrical Specifications | page 15
6 | AC Electrical Specifications | page 16, 17
7 | Timing Chart | page 18
| 7-1 Pseudo SRAM I/F | page 18
| 7-2 Mask ROM I/F | page 18
| 7-3 CPU I/F | page 19
| 7-4 CPU Interface | page 20, 21
| 7-5 Pseudo SRAM I/F | page 22

Mega CD Software Development Manual
Title Page
Diagram Diagram (horizontal)
Index
*

1 | Mapping | page 1, 2
2 | Main CPU Mapping | page 3, 4
3 | Sub-CPU Mapping | page 5, 6
4 | Mega-CD Register Table | page 7, 8
5 | Sub-CPU Registers | page 9, 10, 11
6 | CDC | page 12, 13
7 | Communication | page 14
8 | General Use Timer | page 15
9 | Interrupts | page 15
10 | CDD | page 16, 17
11 | Color Calculation | page 18
12 | Rotation Compression | page 19, 20, 21 , 22, 23, 24, 25 , 26, 27, 28, 29 , 30, 31
13 | Subcodes | page 32
14 | Main-CPU | page 33
15 | CDC | page 34
16 | Communication | page 35, 36

Mega-CD Disc Format Specifications
Title Page
Table of Contents
*

1 | Overview Of The Mega-CD Disc Format | page 1
2 | Physical Format | page 2
| 2-1 Partition and Configuration of Disc Areas | page 2
| 2-2 Configuration of Tracks | page 2, 3, 4
3 | Logical Format | page 5
| 3-1 Sector Structure | page 5
| 3-2 System Area | page 6
| 3-3 Booting System | page 7
| 3-4 File System | page 8, 9, 10 , 11, 12, 13, 14
| 3-5 User File Table | page 15
| 3-6 Others | page 15

Appendix 1 Glossary | page 16, 17
Appendix 2 System ID | page 18, 19
Appendix 3 Disc ID | page 20, 21
Appendix 4 Area for defining Japanese codes | page 22

Mega-CD Bios Manual

Title Page
Table of Contents
*

1 | CD System Control Process Summary | page 1
| 1-1 Hardware Summary | page 1
| 1-2 Process Summary | page 2
| 1-3 CD System Control Chart | page 3
| 1-4 CD System Memory Map | page 4
2 | BIOS Call Summary | page 5
| 2-1 BIOS Call Functions | page 5, 6
| 2-2 BIOS Call List | page 7, 8
| 2-3 BIOS Call Type Chart | page 9
| 2-4 Drive Control System Process Chart | page 10
3 | BIOS Call Reference | page 11
| 3-D Drive (Mechanism) | page 12
| 3-M CD-DA (Music) | page 13, 14, 15 , 16, 17
| 3-R CD-ROM (Data) | page 18, 19
| 3-B CD-BIOS (Other Functions) | page 20, 21, 22
| 3-F FADER (Fader) | page 23
| 3-C CDC (Decoder) | page 24, 25
| 3-S SCD (Subcode) | page 26, 27, 28
| 3-L LED (LED Display) | page 29
4 | System Bootstrap Sequence | page 30
| 4-1 CD Boot System Mode 1 (Boot from cartridge) | page 30
| 4-2 CD Boot System Mode 2 (Boot from CD-DISC) | page 30
| 4-3 Booting Application Programs | page 31, 32
5 | Jump Table And User Calls | page 33
| 5-1 Structure of the Jump Table | page 33
| 5-2 BIOS Call Sequence | page 33
| 5-3 User Call Sequence | page 34
| 5-4 Exception Processing Sequence | page 35
6 | Boot System | page 36
| 6-1 CD-Boot | page 36, 37
7 | Back-Up RAM | page 38
| 7-1 Back-up RAM | page 38, 39, 40, 41, 42, 43, 44, 45

Mega-CD Tech Bulletins
*

Mega-CD Tech Bulletin #1 | page 1, 2, 3 , 4, 5
Mega-CD Tech Bulletin #19 | page 1
Mega-CD Tech Bulletin #20 | page 1, 2
Mega-CD BIOS Tech Bulletin | page 1, 2

Cinepak Tech Bulletins
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Cinepak Tech Bulletin #01 | page 1
Cinepak Tech Bulletin #02 | page 1

Addendum
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Addendum 1 | page 1
Addendum 3 | page 1, 2, 3 , 4, 5
Addendum 4 | page 1

Software Standards
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Software Standards | page 1, 2, 3 , 4, 5, 6 , 7, 8, 9

Misc
*

Manual Correction | page 1
Software Guidelines | page 1, 2
Technical Memo #4 | page 1, 2
Misc FAX | page 1