Differences

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--- base:16-bit_absolute_comparison [2020-10-22 16:37] – [Skate & Eins Method] tww
+++ base:16-bit_absolute_comparison [2020-10-22 20:31] (current) – tww
@@ Line 49: / Line 49: @@
 endOfAbsCompare:
 </code>
-TWW method including the zero flag:
-<code>
-/*! «»«»«»«»{CMP16}«»«»«»«»
-    Does exactly the same as CMP of two values (effectively its a val1-val2) and sets the flags as follows:
-                       (BCC/BCS)      (BEQ/BNE)      (BMI/BPL)
-    If val1 = val2 : Carry =  SET   Zero =  SET   Negative = CLEAR
-    If val1 > val2 : Carry =  SET   Zero = CLEAR  Negative = CLEAR
-    If val1 < val2 : Carry = CLEAR  Zero = CLEAR  Negative =  SET
-*/
-    lda val1
-    sec
-    sbc val2
-    php
-    lda val1+1
-    sbc val2+1
-    php
-    pla
-    sta temp
-    pla
-    and #%00000010
-    ora #%11111101
-    and temp
-    pha
-    plp
-Somewhere on ZP:
-temp:
-    .byte $00
-</code>