anchor.diff:  
   (defun set-cf-on-sub (value1 value2)
     (setf (flag-p :cf) (> value2 value1))
  -  value1)
  +  (- value1 value2))
   
   (defun set-sf-on-op (value is-word)
     (setf (flag-p :sf) (negative-p value is-word))
  
positive.code: (defmacro parse-mov-opcode (opcode)
    `(let ((mod-4 (mod ,opcode 4)))
       (with-mod-r/m-byte
         (cond
  	 ((= mod-4 0)
  	  (mov (byte-register (bits->byte-reg reg-bits)) (indirect-address mod-bits r/m-bits nil)))
  	 ((= mod-4 1)
  	  (mov (register (bits->word-reg reg-bits)) (indirect-address mod-bits r/m-bits t)))
  	 ((= mod-4 2)
  	  (mov (indirect-address mod-bits r/m-bits nil) (byte-register (bits->byte-reg reg-bits))))
  	 ((= mod-4 3)
  	  (mov (indirect-address mod-bits r/m-bits t) (register (bits->word-reg reg-bits))))))))
  
  ;; Group 4/5 (inc/dec on EAs)
  
negative.code: 
  (defmacro parse-alu-opcode (opcode operation)
    `(let ((mod-8 (mod ,opcode 8)))
       (case mod-8
         (0
  	(with-mod-r/m-byte
  	  (,operation (byte-register (bits->byte-reg reg-bits)) (indirect-address mod-bits r/m-bits nil) nil mod-bits r/m-bits)))
         (1
  	(with-mod-r/m-byte
  	  (,operation (register (bits->word-reg reg-bits)) (indirect-address mod-bits r/m-bits t) t mod-bits r/m-bits)))
         (2
  	(with-mod-r/m-byte
  	  (,operation (indirect-address mod-bits r/m-bits nil) (byte-register (bits->byte-reg reg-bits)) nil)))
         (3
  	(with-mod-r/m-byte
  	  (,operation (indirect-address mod-bits r/m-bits t) (register (bits->word-reg reg-bits)) t)))
         (4
  	(,operation (next-instruction) (byte-register :al) nil))
         (5
  	(,operation (next-word) (register :ax) t)))))
  
  (defmacro add-without-carry (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "add" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (set-zf-on-op (set-sf-on-op (set-cf-on-add (incf ,dest ,src)) ,is-word)))))
  
  (defmacro add-with-carry (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "adc" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (set-zf-on-op (set-sf-on-op (set-cf-on-add (incf ,dest (+ ,src (flag :cf)))) ,is-word)))))
  
  (defmacro sub-without-borrow (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "sub" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (let ((src-value ,src))
  	 (set-zf-on-op (set-sf-on-op (set-cf-on-sub (+ (decf ,dest src-value) src-value) src-value) ,is-word))))))
  
  (defmacro sub-with-borrow (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "sbb" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (let ((src-plus-cf (+ ,src (flag :cf))))
  	 (set-zf-on-op (set-sf-on-op (set-cf-on-sub (+ (decf ,dest src-plus-cf) src-plus-cf) src-plus-cf) ,is-word))))))
  
  (defmacro cmp-operation (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "cmp" :src ,src :dest ,dest)
       (set-zf-on-op (set-sf-on-op (set-cf-on-sub ,dest ,src) ,is-word))))
  
  (defmacro and-operation (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "and" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (set-zf-on-op (set-sf-on-op (setf ,dest (logand ,src ,dest)) ,is-word))
         (setf (flag-p :cf) nil))))
  
  (defmacro or-operation (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "or" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (set-zf-on-op (set-sf-on-op (setf ,dest (logior ,src ,dest)) ,is-word))
         (setf (flag-p :cf) nil))))
  
  (defmacro xor-operation (src dest is-word &optional mod-bits r/m-bits)
    `(disasm-instr (list "xor" :src ,src :dest ,dest)
       (with-in-place-mod ,dest ,mod-bits ,r/m-bits
         (set-zf-on-op (set-sf-on-op (setf ,dest (logxor ,src ,dest)) ,is-word))
         (setf (flag-p :cf) nil))))
  
  (defmacro parse-group1-byte (opcode operation mod-bits r/m-bits)
    `(case (mod ,opcode 4)
      (0 (,operation (next-instruction-ahead-of-indirect-address ,mod-bits ,r/m-bits) (indirect-address ,mod-bits ,r/m-bits nil) nil mod-bits r/m-bits))
      (1 (,operation (next-word-ahead-of-indirect-address ,mod-bits ,r/m-bits) (indirect-address ,mod-bits ,r/m-bits t) t mod-bits r/m-bits))
      (3 (,operation (twos-complement (next-instruction-ahead-of-indirect-address ,mod-bits ,r/m-bits) nil) (indirect-address ,mod-bits ,r/m-bits t) t mod-bits r/m-bits))))
  
  (defmacro parse-group1-opcode (opcode)
    `(parse-group-opcode
  