1. VDP2 features
1.1 System configuration
1.2 Address map
・VRAM
・Color RAM
 ·register
1.3 Scroll function
・Display screen
・Scroll screen
・Line screen
・Window
1.4 Priority function
・Priority function
・Color calculation function
・Color offset function
・Shadow function

2. TV screen
2.1 TV screen mode
・Dedicated high resolution graphics mode
2.2 Interlace mode
2.3 TV screen configuration
2.4 TV screen mode register
2.5 External signals and scanning status
・External signal enable register
・Screen status register
・H counter register
・V counter register

3. RAM
3.1 Address map
・VRAM size register
3.2 VRAM bank division
・RAM control register
3.3 How to access VRAM during display period
・VRAM access during display period
・Access to image data
・Vertical cell scroll table data access
・Read/write access by CPU
・VRAM cycle pattern register specification procedure
・VRAM cycle pattern register
3.4 Color RAM Mode
・RAM control register

4. scroll screen
4.1 Screen display control
・Screen display enable register
4.2 Scroll screen configuration
・Cell format
・Bitmap format
4.3 Cell
・Number of character colors
・Cell data structure
・Transparent dots
・RGB format dot data
4.4 Character patterns
・Character size and cell placement
4.5 Character control register
4.6 Pattern name table (page)
・Data structure of pattern name table
・Pattern name data
・Pattern name control register
4.7 Plane
・Plane size
・Plane size register
4.8 Map
・Map specification register
・Map size
・Map offset register
・Normal scroll screen map register
・Rotating scroll screen map register
4.9 Bitmap
・Bitmap size
・Number of bitmap colors
・Bitmap pattern
・Bitmap palette number
・Special function bit
・Bitmap palette number register
4.10 Display area
・Display area
・Screen overflow processing
・Screen over pattern name
・Screen over pattern name register
4.11 Mosaic processing
・Mosaic control register

5. Normal scroll screen
5.1 Screen scrolling function
・Screen scroll value register
5.2 Scaling function
・Coordinate increment register
・Reduction enable register
5.3 Line & vertical cell scrolling function
・Line scroll function
・Vertical cell scrolling function
・Line & vertical cell scroll control register
・Line scroll table address register
・Vertical cell scroll table address register

6. rotating scroll screen
6.1 Rotating scroll coordinate calculation
6.2 Rotary scroll screen display control
・RAM control register
6.3 Rotation parameter control
・Data structure of rotation parameter table
・Rotation parameter table
・Rotation parameter read control register
・Rotation parameter table address register
・Frame buffer rotation readout
・Switching rotation parameters
・Rotation parameter mode register
6.4 Coefficient table control
・RAM control register
・Coefficient table control register
・Coefficient table address offset register

7. line screen
7.1 Line color screen
・Line color screen table address register
7.2 Back screen
・Back screen table address register

8. window
8.1 Window area
・Normal rectangular window
・Window position register
・Normal line window
・Line window table address register
・Sprite window
・Sprite control register
・Window effective area for the screen
8.2 Window handling
・Window control register

9. sprite data
9.1 Sprite data
・Sprite type
・Sprite color mode
9.2 Priority and color operations
・Priority number selection
・Color calculation enable condition
・Color calculation ratio selection
・Sprite control register
・Priority number register
・Color calculation ratio register

Ten. dot color data
10.1 Dot color data in palette format
・Sprite dot color data
・Scroll dot color data
・Color RAM address offset register
10.2 Dot color data in RGB format
・Sprite dot color data
・Scroll dot color data
10.3 Special function codes
・Special function code select register
・Special function code register

11. Priority function
11.1 Priority function
・Priority number
・Priority number register
11.2 Special priority functions
11.3 Inserting a line color screen
・Line color screen enable register

12. color calculation
12.1 Color calculation function
・Normal color calculation
・Extended color calculation function
・Blur calculation function
・Color calculation control register
・Color calculation ratio register
12.2 Special color calculation function
・Special color calculation mode register

13. Color offset function
13.1 Color offset specification
・Color offset enable register
・Color offset select register
・Color offset register

14. shadow function
14.1 Shadow processing
・Normal shadow
・MSB Shadow
・Shadow control register

15. How to use VDP2
15.1 Operation flow
15.2 How to use RAM
・VRAM
・Definition of color RAM
・Color RAM reference
 ·register
15.3 Bit configuration diagram
15.4 Usage Techniques
Techniques for making bitmaps any size
Technique to double buffer VRAM

16. quick reference

Manual conventions

Table of contents

Index

(C)SEGA ENTERPRISES, LTD., 1997