| RDBSA00, RDBSA01 | 18000EH | bit 1,0 | VRAM -A0 (or VRAM-A) |
| RDBSA10, RDBSA11 | 18000EH | Bit 3, 2 | For VRAM-A1 |
| RDBSB00, RDBSB01 | 18000EH | bits 5,4 | For VRAM-B0 (or VRAM- B) |
| RDBSB10, RDBSB11 | 18000EH | bits 7,6 | For VRAM-B1 |
| RDBSx1 | RDBSx0 | Intended use of VRAM |
| 0 | 0 | Do not use as RBG0 RAM |
| 0 | 1 | RBG0 coefficient table RAM |
| 1 | 0 | RBG0 pattern name table RAM |
| 1 | 1 | RAM | for RBG0 character pattern table (or bitmap pattern)
場合 When VRAM is not divided into banks, the bit for VRAM-A0 is used for VRAM-A and the bit for VRAM-B0 is used for VRAM-B.
* If coefficient data is not required for each dot, there is no need to set the coefficient table RAM (01B).
* When displaying in bitmap format, it is not necessary to set RAM (10B) for pattern name table.
* The setting of the VRAM cycle pattern register of the VRAM bank specified for the rotary scroll RAM is ignored.
* If the image data read address is not in the specified bank, the data will not be read and the correct screen display will not be possible.
When displaying RBG1, be sure to set 00B to the bits for VRAM-B0 and VRAM-B1.