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Routines |
DE | Address of byte in screen refresh buffer |
29735 | LD A,255 | Set all bits in this SRB byte, indicating that 8 squares in a row (the bottom half of the bubble) need refreshing |
29737 | LD (DE),A | |
29738 | LD A,E | Point DE at the SRB byte corresponding to the next row up |
29739 | SUB 4 | |
29741 | LD E,A | |
29742 | LD A,255 | Set all bits in this SRB byte, indicating that 8 squares in a row (the top half of the bubble) need refreshing |
29744 | LD (DE),A | |
29745 | RET |