[ug-bosug] Instruction Design

[Ajay Ramesh]

Can anyone help do this with gcc. 

[b]Assume the design includes a Program Counter, Accumulator, Arithmetic Logic Unit and Instruction Register. Let “addr” denote the address (field) and “mem [addr]” denotes contents of memory location “addr”.

Note 1:  The Memory is external to the Processor
Note 2:  Assume memory is 4K by 16 bits
     
	Designing an  Instruction Set to do the following:

1.	Load Accumulator from memory location “addr”
2.	Store Contents of  Accumulator to memory location ‘addr”
3.	Add the Contents of Accumulator and memory location “addr” and store in Accumulator
4.	Subtract the Contents of  memory location “addr” from  Accumulator and store in Accumulator
5.	Load the Program Counter from memory location “addr”
6.	Set the Accumulator to  “addr” if accumulator >= zero
7.	Set the Accumulator to  “addr” if accumulator not equal to zero
8.	Stop the Processor[/b]
 
 
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