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--- base:8bit_multiplication_16bit_product_fast_no_tables [2023-03-15 03:22] – djmips
+++ base:8bit_multiplication_16bit_product_fast_no_tables [2023-03-15 03:25] (current) – djmips
@@ Line 56: / Line 56: @@
 b8:  ror
      ror mul1
-     inc mul2     ; Optional - could also do INX if you want it to be unchanged when calling this routine.
+     inx          ; Optional - this preserves X across the call - could also do inc mul2 or leave out
      rts
 zro: stx mul1
-     tax
+     txa
      rts
 </code>