SEGA SATURN DEVELOPER'S MANUAL

■ 3.4 VDP2: VDP2 displays the scroll screen and determines the priority of all screens (including sprites). Simultaneous display of the scroll screen has been expanded to a maximum of 5 screens, allowing you to move the screen up / down / left / right and rotate. The priority (display priority) can be set for each character in a programmable manner.
System configuration: VRAM is connected to VDP2, and color RAM is built-in. Image data is defined in the VRAM and color RAM from the CPU via the SCU.
The data defined in VRAM is read according to the register settings and becomes the image data of each scroll screen. The image data of each scroll screen and the image data sent from VDP1 and the external image circuit are given display priority according to the register settings and become display image data. Furthermore, the display image data is converted into display color data and output to the TV (Figure 3.12).
Figure 3.12 VDP2 system configuration

■ 3.4 VDP2