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write lower byte at address 0x02
(<=> MOV.B #0x34, &0x0204)
write higher byte at address 0x02
(<=> MOV.B #0x12, &0x0205)
write 16-bit word at address 0x03
(<=> MOV #0x5678, &0x0206)
read at address 0x02
(<=> MOV &0x0204, r5)
read at address 0x03
(<=> MOV &0x0206, r6)