Chart table of contents

table

Chapter 1 Functions of VDP2

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 modes

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 Restrictions on pattern name data storage location

Table 3.2 Number of pattern name table data accesses 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 auxiliary mode

Table 4.6 Bit configuration when pattern name data is 1 word

Table 4.7 Inversion function bits

Table 4.8 Address values of map specification registers according to settings

Table 4.9 Bitmap size

Table 4.10 Bitmap color count

Table 4.11 Bitmap pattern capacity per surface

Table 4.12 Normal scroll screen display area

Table 4.13 Display area of rotary scroll screen

Chapter 5 Normal scroll screen

Table 5.1 Horizontal coordinate increment and contraction settings

Table 5.2 Restrictions on the display screen by setting the reduction enable bit

Chapter 6 Rotating scroll screen

Table 6.1 Rotation scroll screen

Table 6.2 Rotation parameters

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

Table 6.4 Image processing using the most significant bit value of the 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 Selection of sprite color arithmetic ratio register

Chapter 11 Priority Function

Table 11.1 Priority when the priority numbers are equal

Table 11.2 Special priority functions by mode

Chapter 12 Color Calculation

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

Table 12.2 Extended color calculation ratio

Table 12.3 Special color calculation mode

Chapter 15 How to use VDP2

Table 15.1 Registers associated with the data defined in VRAM

figure

Chapter 1 Functions of VDP2

Figure 1.1 System configuration

Figure 1.2 Address map

Chapter 2 TV screen

Figure 2.1 Display method by interlace setting

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 Restrictions on access specification for pattern table data

Figure 3.4 Example of character pattern data read access specification

Figure 3.5 Access specification restrictions for vertical cell scroll table data

Figure 3.6 Example of CPU read / write access specification when VRAM is not divided into 2 banks

Figure 3.7 Example of CPU read / write access specification when dividing VRAM into 2 banks

Figure 3.8 VRAM cycle pattern specification example

Figure 3.9 Color data structure on color RAM

Figure 3.10 Color RAM color data

Chapter 4 Scroll screen

Figure 4.1 Cell-type scroll screen configuration

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

Figure 4.3 Bitmap format scroll screen configuration

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 layout by 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 the pattern name data is 2 words

Figure 4.10 Bit configuration when the pattern name data is one word

Figure 4.11 Dot color data based on the number of character colors

Figure 4.12 Reverse display of character patterns

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 Plain map placement with reduced settings

Figure 4.17.1 Bitmap pattern configuration, part 1

Figure 4.17.2 Bitmap pattern configuration, part 2

Figure 4.17.3 Bitmap pattern configuration, part 3

Figure 4.17.4 Bitmap pattern configuration, part 4

Figure 4.17.5 Bitmap pattern configuration, part 5

Figure 4.17.6 Bitmap pattern configuration, part 6

Figure 4.17.7 Bitmap pattern configuration, part 7

Figure 4.17.8 Bitmap pattern configuration, part 8

Figure 4.17.9 Bitmap pattern configuration, 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 based on the number of bitmap colors

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 Example line scroll table

Figure 5.6 Vertical cell scroll function

Figure 5.7 Data structure on a vertical cell scroll table

Figure 5.8 Example of vertical cell scroll table

Chapter 6 Rotating scroll screen

Figure 6.1 How to display the rotary scroll screen

Figure 6.2 Rotation parameter data structure

Figure 6.3 Rotation parameter table

Figure 6.4 How to store the 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 Normal line window table configuration

Figure 8.5 Sprite window

Figure 8.6 Window Effective Area

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 RGB sprite dot color data

Figure 10.6 Scroll dot color data in RGB format

Figure 10.7 Dot color code corresponding to special function code

Chapter 11 Priority Function

Figure 11.1 Priority function

Figure 11.2 Inserting a line color screen

Chapter 12 Color Calculation

Figure 12.1 Color calculation function

Figure 12.2 Color calculation ratio mode

Figure 12.3 Extended color calculation function

Figure 12.4 Blurring 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 sprite data for normal shadows

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 screens for rotation parameter modes 2 and 3

Figure 15.5 Example of sprite display to make it translucent