Category:68000 Assembly: Difference between revisions
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* A number with a # in front represents a constant, literal value. For example, the 3 in <code>MOVE.B #3,D0</code> represents the number 3. |
* A number with a # in front represents a constant, literal value. For example, the 3 in <code>MOVE.B #3,D0</code> represents the number 3. |
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* A number without a # in front represents a memory location. For example, the 3 in <code>MOVE.B 3,D0</code> represents <i>the byte stored at memory address <code>$00000003</code></i>. |
* A number without a # in front represents a memory location. For example, the 3 in <code>MOVE.B 3,D0</code> represents <i>the byte stored at memory address <code>$00000003</code></i>. |
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* A number that doesn't have a $ or % prefix is a decimal (base 10) value. |
* A number that doesn't have a $ or % prefix is a decimal (base 10) value. |
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* A number that begins with a $ is a hexadecimal value. |
* A number that begins with a $ is a hexadecimal value. |
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* A number that begins with a % is a binary value. |
* A number that begins with a % is a binary value. |
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| ⚫ | * The operand of <code>BTST</code>,<code>BSET</code>,<code>BCLR</code>, or <code>BCHG</code> represents a bit position, starting at the rightmost binary digit as 0 and counting up from right to left. For example, <code>BCLR #3,D0</code> performs the same bitwise operation that you would get from doing <code>AND.B #%11110111,D0</code>. |
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| ⚫ | * The operand of <code>BTST</code>,<code> |
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===Data Registers=== |
===Data Registers=== |
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