opcodes การใช้

• Some 6809 opcodes also live on in the Freescale embedded processors.
• In Thumb, the 16-bit opcodes have less functionality.
• PICT 1 opcodes were supported as a subset for backward compatibility.
• Instructions are 16 bits wide and have 4-bit opcodes.
• The PICT file format consists essentially of serialized QuickDraw opcodes.
• :The LOAD _ * opcodes place a value on the stack.
• Undefined opcodes have been converted into NOPs, although of varying instruction lengths.
• It has 72 instructions with seven addressing modes for a total of 197 opcodes.
• This version featured 16-bit opcodes and numerous changes which enhanced its utility.
• Another method for selecting opcodes is threaded code.
• Long Branches are 3-byte opcodes with full 16-bit address branching.
• Both of these products allowed users to write RPG II programs with RPG III opcodes.
• Three opcodes are used to detect input.
• The shorter opcodes give improved code density overall, even though some operations require extra instructions.
• Some instruction set designers reserve one or more opcodes for some kind of system call or software interrupt.
• They repeated this step until all the opcodes of a presumably complete and correct program were in place.
• All belt machines have variants of the load / store opcodes to access local variables and the heap.
• It laid out a complete list of undocumented opcodes and features, and was distributed across many hobbyist forums.
• Undocumented or illegal opcodes are not detected by the Z80 and have various effects, some of which are useful.
• Short Branches are 2-byte opcodes with page-absolute addressing, and a 256-byte address boundary.