There are 15 MARIE instructions so with a 4-bit op code we can add one instruction. provide the full MARIE RTN for the described new operation (include the fetch, decode, operand fetch (if necessary), execution and store result (if necessary) stages). X refers to a main memory address of the datum/pointer/branch location which is stored in IR[11..0], do not reference X in your RTN.

Hand-compile the following MARIE code. Show the result in hexadecimal (not binary). 200 Top: 201 202 203 204 205 Next: 206 207 208 209 20A 20B 20C End 20D 20E 20F 210 211 Load X Subt Y Skipcond 01 Jump Next Jump End Load X Add One Store X Load Y Subt One Store Y Jump Top Load X Output Halt X is stored here Y is stored here One is stored here Hand-compile the following MARIE code. Show the result in hexadecimal (not binary). 200 Top: 201 202 203 204 205 Next: 206 207 208 209 20A 20B 20C End 20D 20E 20F 210 211 Load X Subt Y Skipcond 01 Jump Next Jump End Load X Add One Store X Load Y Subt One Store Y Jump Top Load X Output Halt X is stored here Y is stored here One is stored here