Contact Sam Cruise: Routine at E700

E700: Copy a play area tile into the back buffer

Used by the routine at E70C.

Input
HL	Play area tile base address

E700

LD DE,$A01E

The first byte of the back buffer is at A01E

This entry point is also used by the routine at E70C (with HL=A01E and DE holding a display file address) to copy the tile from the back buffer to the screen.

E703

LD B,$08

There are 8 bytes to copy

E705

LD A,(HL)

Copy the 8 tile bytes to the back buffer or the screen

E706

LD (DE),A

E707

INC H

E708

INC D

E709

DJNZ $E705

The address of this entry point is placed into bytes 0x08 and 0x09 of a policeman's buffer by the routine at 6100, and is also found in the command lists at FDAC and FE94.

E70B

RET