65816 Addressing mode: Block Move Positive (forward) -- xyc (MVP) (3 bytes) (7 cycles) +---------------+------------------+-----------------------+----------+ | Cycle | Address Bus | Data Bus |Read/Write| +---------------+------------------+-----------------------+----------+ | +- 1 | PBR,PC | Op Code | R | | | 2 | PBR,PC+1 | Dest. Bank Address | R | | | 3 | PBR,PC+2 | Source Bank Address | R | | N-2 | 4 | SBA,X | Source Data | R | | Byte | 5 | DBA,Y | Dest Data | W | | C=2 | 6 | DBA,Y | Internal Operation | R | | +- 7 | DBA,Y | Internal Operation | R | | +- 1 | PBR,PC | Op Code | R | | | 2 | PBR,PC+1 | Dest. Bank Address | R | | N-1 | 3 | PBR,PC+2 | Source Bank Address | R | | Byte | 4 | SBA,X-1 | Source Data | R | | C=1 | 5 | DBA,Y-1 | Dest Data | W | | | 6 | DBA,Y-1 | Internal Operation | R | | +- 7 | DBA,Y-1 | Internal Operation | R | | +- 1 | PBR,PC | Op Code | R | | | 2 | PBR,PC+1 | Dest. Bank Address | R | | N Byte | 3 | PBR,PC+2 | Source Bank Address | R | | Last | 4 | SBA,X-2 | Source Data | R | | C=0 | 5 | DBA,Y-2 | Dest Data | W | | | 6 | DBA,Y-2 | Internal Operation | R | | | 7 | DBA,Y-2 | Internal Operation | R | | +- 1 | PBR,PC+3 | New Op Code | R | +---------------+------------------+-----------------------+----------+ See also: Abbreviations x = Source Address y = Destination c = Number of Bytes to move -1 x,y Decrement MVP is used when the destination start address is higher (more positive) than the source start address. FFFFFF ^ Dest Start | Source Start | Dest End | Source End 000000 |