Jet Set Willy: Unused RAM at 93BB

| Unused

93BB: Unused routine

This routine is not used, but if it were, it would set the INK colour for a 3x2 block of cells, maintaining the PAPER, BRIGHT and FLASH attributes of the current room background. It is identical to the code at 8E5F in Manic Miner that is used to set the attributes for a vertical guardian.
Input
A | INK colour (0-7)
HL | Attribute buffer address
93BB | LD (HL),A | Store the INK colour (bits 0-2)
93BC | LD A,($80A0) | Collect the current room's background tile attribute from 80A0
93BF | AND $F8 | Keep only bits 3-7 (PAPER, BRIGHT, FLASH)
93C1 | OR (HL) | Merge the INK bits
93C2 | LD (HL),A | Store the resultant attribute byte
93C3 | LD DE,$001F | Prepare DE for later addition
93C6 | INC HL | Move right one cell and store the attribute byte there
93C7 | LD (HL),A
93C8 | ADD HL,DE | Move left one cell and down a row and store the attribute byte there
93C9 | LD (HL),A
93CA | INC HL | Move right one cell and store the attribute byte there
93CB | LD (HL),A
93CC | ADD HL,DE | Move left one cell and down a row and store the attribute byte there
93CD | LD (HL),A
93CE | INC HL | Move right one cell and store the attribute byte there
93CF | LD (HL),A
93D0 | RET |