Z80 Assembly 88: Block Move (memcpy) and Swap (memswap)
The Need for Block Operations In system programming and game development, you constantly need to move large chunks of data—transferring level data, shifting arrays, or buffering screen regions. Writing a loop for this is slow; the Z80 provides dedicated instructions for speed. Routine 1: Block Move (memcpy) `memcpy′ (Memory Copy) copies a block of bytes from a source address to a destination address. This is the fastest way to achieve the operation. ...