;;; treating (a) as the start of the array). This, labelled A, gives
;;; us another index into the detailed pages[-], which we can use to
;;; look up the details for the character in question: we add the low
;;; 8 bits of the character, shifted twice (because we have four-byte
;;; treating (a) as the start of the array). This, labelled A, gives
;;; us another index into the detailed pages[-], which we can use to
;;; look up the details for the character in question: we add the low
;;; 8 bits of the character, shifted twice (because we have four-byte