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Introducing the Instruction Set Part 3 - Intellivision Wiki

Introducing the Instruction Set Part 3


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(Unsigned Comparisons: fixed typo)
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The unsigned comparisons require some additional explanation to be useful.  After comparing two unsigned numbers, the [[BC]] instruction will branch if the second number is greater than or equal to the first.  The [[BC]] instruction will branch if the second number is smaller than the first.  The CP1610 does not offer unsigned equivalents for "branch if greater than" or "branch if less than or equal."  You can get similar effects, though, by combining [[BC]] and [[BNC]] with [[BEQ]] or [[BNEQ]] to separate out the "equals", "greater-than" and "less-than" cases.
+
The unsigned comparisons require some additional explanation to be useful.  After comparing two unsigned numbers, the [[BC]] instruction will branch if the second number is greater than or equal to the first.  The [[BNC]] instruction will branch if the second number is smaller than the first.  The CP1610 does not offer unsigned equivalents for "branch if greater than" or "branch if less than or equal."  You can get similar effects, though, by combining [[BC]] and [[BNC]] with [[BEQ]] or [[BNEQ]] to separate out the "equals", "greater-than" and "less-than" cases.
=== How Unsigned Arithmetic Works With Conditional Branches ===
=== How Unsigned Arithmetic Works With Conditional Branches ===

Revision as of 10:35, 8 September 2008

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