Table of contents

table

Chapter 1 VDP2 functions

Table 1.1 TV screen mode

Table 1.2 Scroll screen

Table 1.3 Window

Table 1.4 Scroll screen functions

Chapter 2 TV screen

Table 2.1 TV screen mode

Table 2.2 Registers for external screen settings

Table 2.3 H counter register bit contents

Table 2.4 V counter register bit contents

Chapter 3 RAM

Table 3.1 Data defined in VRAM

Table 3.2 Limitations on pattern name data storage location

Table 3.2 Number of accesses to pattern name table data required during one cycle

Table 3.3 Character pattern data (bitmap pattern data) read access count

Table 3.4 Character pattern data read access specification restrictions

Table 3.5 Access commands

Chapter 4 Scroll screen

Table 4.1 Number of character colors and dot data size

Table 4.2 Cell data structure

Table 4.3 Transparent dot data values

Table 4.4 Pattern name table capacity and page boundary for one page

Table 4.5 Character number assistance mode

Table 4.6 Bit configuration when pattern name data is 1 word

Table 4.7 Invert function bit

Table 4.8 Address values of map specification registers depending on settings

Table 4.9 Bitmap size

Table 4.10 Number of bitmap colors

Table 4.11 Bitmap pattern capacity per page

Table 4.12 Display area of normal scroll screen

Table 4.13 Display area of rotating scroll screen

Chapter 5 Normal scroll screen

Table 5.1 Horizontal coordinate increment and reduction settings

Table 5.2 Display screen limitations by setting the reduction enable bit

Chapter 6 Rotating scroll screen

Table 6.1 Rotating scroll screen

Table 6.2 Rotation parameters

Table 6.3 Address values indicated by the least significant bit of coefficient parameter data by coefficient data size

Table 6.4 Image processing using the most significant bit value of coefficient data for RBG0

Chapter 8 Window

Table 8.1 Bit contents of window position register for horizontal coordinates

Table 8.2 Bit contents of window position register for vertical coordinates

Chapter 9 Sprite data

Table 9.1 Shared bits

Table 9.2 Sprite Priority Number Register Selection

Table 9.3 Sprite color calculation ratio register selection

Chapter 11 Priority Function

Table 11.1 Priority when priority numbers are equal

Table 11.2 Special priority functions by mode

Chapter 12 Color operations

Table 12.1 Color calculation functions in high resolution mode or dedicated monitor mode

Table 12.2 Extended color calculation ratio

Table 12.3 Special color calculation modes

Chapter 15. How to use VDP2

Table 15.1 Data defined in VRAM and related registers

figure

Chapter 1 VDP2 functions

Figure 1.1 System configuration

Figure 1.2 Address map

Chapter 2 TV screen

Figure 2.1 Display method using interlace settings

Figure 2.2 TV screen configuration

Chapter 3 RAM

Figure 3.1 VRAM address map by capacity

Figure 3.2 VRAM cycle pattern register

Figure 3.3 Access specification restrictions for pattern name table data

Figure 3.4 Character pattern data read access specification example

Figure 3.5 Access specification restrictions for vertical cell scroll table data

Figure 3.6 CPU read/write access specification example when VRAM is not divided into two banks

Figure 3.7 Example of specifying CPU read/write access when dividing VRAM into two banks

Figure 3.8 VRAM cycle pattern specification example

Figure 3.9 Color data structure on color RAM

Figure 3.10 Color data of color RAM

Chapter 4 Scroll screen

Figure 4.1 Structure of cell format scroll screen

Figure 4.2 Correspondence between cell format scroll screen configuration and data settings

Figure 4.3 Configuration of bitmap format scroll screen

Figure 4.4 Relationship between bitmap format scroll screen configuration and data settings

Figure 4.6 Dot data in RGB format

Figure 4.7 Cell placement according to character size

Figure 4.8.1 Data structure of pattern name table, Part 1

Figure 4.8.2 Data structure of pattern name table, Part 2

Figure 4.8.3 Data structure of pattern name table, Part 3

Figure 4.8.4 Data structure of pattern name table, Part 4

Figure 4.9 Bit configuration when pattern name data is 2 words

Figure 4.10 Bit configuration when pattern name data is 1 word

Figure 4.11 Dot color data based on character color number

Figure 4.12 Reverse display of character pattern

Figure 4.13 Arrangement of pattern name table by plane size

Figure 4.14 Map specification register

Figure 4.15 Map size

Figure 4.16 Map plane placement with zoom settings

Figure 4.17.1 Bitmap pattern structure, Part 1

Figure 4.17.2 Bitmap pattern structure, Part 2

Figure 4.17.3 Bitmap pattern structure, part 3

Figure 4.17.4 Bitmap pattern structure, Part 4

Figure 4.17.5 Bitmap pattern structure, Part 5

Figure 4.17.6 Bitmap pattern structure, Part 6

Figure 4.17.7 Bitmap pattern structure, part 7

Figure 4.17.8 Bitmap pattern structure, Part 8

Figure 4.17.9 Bitmap pattern structure, Part 9

Figure 4.17.10 Bitmap pattern configuration, part 10

Figure 4.17.11 Bitmap pattern configuration, Part 11

Figure 4.17.12 Bitmap pattern configuration, Part 12

Figure 4.17.13 Bitmap pattern configuration, Part 13

Figure 4.17.14 Bitmap pattern configuration, Part 14

Figure 4.17.15 Bitmap pattern configuration, Part 15

Figure 4.18 Dot color data by bitmap color number

Figure 4.19 Mosaic pattern

Chapter 5 Normal scroll screen

Figure 5.1 Configuration of screen scroll value bits

Figure 5.2 Configuration of coordinate increment register

Figure 5.3 Line scroll function

Figure 5.4 Bit configuration of line scroll table data

Figure 5.5 Line scroll table example

Figure 5.6 Vertical cell scrolling function

Figure 5.7 Data structure on vertical cell scroll table

Figure 5.8 Vertical cell scroll table example

Chapter 6 Rotating scroll screen

Figure 6.1 How to display the rotating scroll screen

Figure 6.2 Data structure of rotation parameters

Figure 6.3 Rotation parameter table

Figure 6.4 How to store rotation parameter table in VRAM

Figure 6.5 Switching rotation parameters

Figure 6.6 Line color screen data using coefficient data

Figure 6.7 Bit configuration of coefficient table data

Chapter 7 Line screen

Figure 7.1 Line screen

Figure 7.2 Line color screen table configuration

Figure 7.3 Bit configuration of line color screen table data

Figure 7.4 Back screen table configuration

Figure 7.5 Bit configuration of back screen table data

Chapter 8 Window

Figure 8.1 Normal rectangular window

Figure 8.2 Normal line window

Figure 8.3 Bit configuration of normal line window table data

Figure 8.4 Structure of normal line window table

Figure 8.5 Sprite window

Figure 8.6 Effective area of window

Figure 8.7 Window processing 1

Figure 8.7 Window processing 2

Figure 8.7 Window processing 3

Chapter 9 Sprite data

Figure 9.1 Sprite type

Figure 9.2 Sprite data when palette format and RGB format data are mixed

Chapter 10 Dot color data

Figure 10.1 Sprite dot color data in palette format

Figure 10.2 Sprite color RAM address

Figure 10.3 Scroll dot color data in palette format

Figure 10.4 Scroll color RAM address

Figure 10.5 Sprite dot color data in RGB format

Figure 10.6 Scroll dot color data in RGB format

Figure 10.7 Dot color codes corresponding to special function codes

Chapter 11 Priority Function

Figure 11.1 Priority function

Figure 11.2 Inserting a line color screen

Chapter 12 Color operations

Figure 12.1 Color calculation function

Figure 12.2 Color calculation ratio mode

Figure 12.3 Extended color calculation function

Figure 12.4 Blur calculation function

Chapter 13 Color offset function

Figure 13.1 Color offset data

Chapter 14 Shadow Function

Figure 14.1 Shadow function

Figure 14.2 Writing normal shadow sprite data

Figure 14.3 Normal shadow sprite data

Figure 14.4 Sprite shadows and transparent shadows

Figure 14.5 MSB shadow sprite data

Chapter 15. How to use VDP2

Figure 15.1 Bitmap display image

Figure 15.2 Bitmap display position

Figure 15.3 Example of RBG0 display screen

Figure 15.4 Example of display screen in rotation parameter mode 2 and 3

Figure 15.5 Example of displaying a sprite that is semi-transparent