It is possible to have an opcode with two operands thus creating operand of more than 2 bytes. Do we have to worry about this?
No you don’t have to worry about situations with operands of more than 2 bytes. It is possible to generate an opcode that requires more than 16-bits of operands. Do not worry about implementing these. The test code will never use an operand of more than two bytes. For example, the opcode 0xbf = 10111111 would be an ADD where both the destination and source are a memory addresses passed as operands.
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