Block-transfer instruction

On the PDP-10 mainframe computer, the BLT (Block Transfer) in assembly language programming, is the instruction which copies words from memory to memory. The left half of the BLT instruction's specified accumulator (or AC) specifies the first source address. The right half of the AC specifies the first destination address. The effective address specifies the last destination address. Words are copied, one by one, from the source to the destination, until a word is stored in an address greater than or equal to the effective address of the BLT.

Block-transfer instruction

On the PDP-10 mainframe computer, the BLT (Block Transfer) in assembly language programming, is the instruction which copies words from memory to memory. The left half of the BLT instruction's specified accumulator (or AC) specifies the first source address. The right half of the AC specifies the first destination address. The effective address specifies the last destination address. Words are copied, one by one, from the source to the destination, until a word is stored in an address greater than or equal to the effective address of the BLT.