Used by the routines at $0800, $0C3F, $0FBA, $1129, $12B5, $136F, $13F3, $149F, $15B3, $1640, $169B, $16E9, $176F, $17E5, $191B, $1A04, $1A51, $1B2E, $1C59, $1CB4, $1CCB, $1CEC, $267A, $2696, $26E0, $270D, $27D2, $2873, $2A43, $2B21, $2B3F, $2B52, $2B9F, $2CA5, $322E, $3472, $34B5, $350B, $3558, $359E, $35EF, $364E, $365C and $3687.