Used by the routines at $0800, $09E9, $1129, $149F, $15B3, $1640, $17E5, $191B, $1D4A, $1EE3, $1F29, $1FA0, $2241, $2387, $2696, $27D2, $298B, $29C8, $2A43, $2B52, $2D47, $2E13, $3279, $33BF, $3AB4, $3AD5, $3B5E and $BE09.