★ HARDWARE Manual ★ VDP1 User's Manual
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VDP1 User's Manual / Chapter 6 Command Table
■ 6.5 CMD SRCA (character address)
- CMDSRCA specifies the address that defines the character pattern.
- CMDSRCA is useful for texture drawing commands. Specify 16 bits at the start address + 08H of the command table.
| 15 | 14 | 13 | 12 | 11 | Ten | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
CMDSRCA + 08H | Character address / 8H | 0 | 0 |
- Specify the address that defines the character pattern to be drawn with the texture drawing command.
- The address on the VRAM of the character pattern to be drawn, and the value obtained by dividing the address by 8H is specified by 16 bits.
- Specify the start address that stores the pixel data of the defined character pattern. The pixel data of the upper left vertex of the character pattern becomes the start address. Specify the address of the upper left vertex of the defined character pattern even when rotating the character, left / right, or upside down.
- The content of the pixel data of the character pattern is 4, 8, 16bit / pixel depending on the color mode.
- The size of the table is specified by CMDSIZE (character size).
- Since the character pattern table is defined with a 20HByte boundary, LSB2bit is fixed at 00B.
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★ HARDWARE Manual ★ VDP1 User's Manual
Copyright SEGA ENTERPRISES, LTD., 1997