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1.3 Scroll function

The scroll function of VDP2 has a scroll screen and a window.

Display screen

There are the following TV screen modes.

Table 1.1 TV screen mode 
 TV screen mode 
 Graphic mode 
 Horizontal resolution 
 (pixel) 
 Vertical resolution 
 (pixel) 
 Display device 
 Normal 
 Normal 
 Graphic A 
 320
Selectable from 
 224 
 240 
 256 
 
 NTSC system 
 or 
 PAL system TV 
 Normal 
 Graphic B 
 352 
 High Resolution 
 High Resolution 
 Graphic A 
640
 High-Res 
 Graphic B 
 704 
 dedicated monitor 
 dedicated normal 
 Graphic A 
 320 
 480 
 31kHz monitor 
 Normal 
 Graphic B 
 352 
 480 
 Hi-Vision Monitor 
 High resolution 
 Graphic A 
 640 
 480 
 31kHz monitor 
 High resolution 
 Graphic B 
 704 
 480 
 High Definition Monitor

Scrolling screens that can be displayed are as follows.

Table 1.2 Scroll screen 
 Scroll screen name 
 Name 
 Remarks 
 Normal 
 Scroll screen 
 Normal scroll 0 
 NBG0 
 Can move up and down, left and right, and scale up and down 
 Normal scroll 1 
 NBG1 
 Normal scroll 2 
 NBG2 
 Up / Down / Left / Right Can be moved 
 Normal scroll 3 
 NBG3 
 Rotary scroll screen 
 Rotary scroll 0 
 RBG0 
 Zoom rotation 
 Rotary scroll 1 
 RBG1 
 Line screen 
 Line color screen 
 LNCL 
 Use only for color operations 
 Back screen 
 BACK 
 Other screens displayed at all Only if not 
 Extended screen 
 External input screen 
 EXBG 
 Screen input from outside

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