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* If you have trouble viewing instructions / images below, please refer to the Assignment chapter in Unit 6 ' s Learning Guide For the
If you have trouble viewing instructionsimages below, please refer to the "Assignment" chapter in Unit s Learning Guide
For the Unit assignment, hand compile the following two assembly language programs into machine language that can be loaded into an executed on the Hack computer.
Chapter of the Nisan and Schocken text describes the machine language instructions that are supported by the Hack computer system. It is important to understand that different computer architectures will support different capabilities and of course this translates into differences in both the machine language instructions of the computer and the assembler language that supports the system.
In the Hack computer platform, there are essentially two types of machine language instructions the A instruction see below
The Ainstruction is used to set the A register to a bit value Ainstruction: @value Where value is either a nonnegative decimal number or a symbol referring to such number. value v or value v or Binary V V V V v v V V V V V V V v v
And the C instruction as follows. ALL Hack computer programs can be developed using these two instructions.
The C instruction allows the programmer to interact with the CPUand in particular the ALU to perform computations against the values in the registers. If you recall, in Unit we presented the ALU for the Hack computer as follows:
Each of the instructions that the Hack ALU is capable of running can be specified to the ALU through a set of control bits. These control bits or the C bits in the instruction and their associated functions are listed below.
IT IS IMPORTANT TO COMPLETE THIS EXERCISE. I caution you not to take any shortcuts. The best way to really gain an understanding of how machine language and assembler language works is by learning how to convert assembler into machine language. We will gain an understanding of the relationship between hardware and software in this process. As such I urge you to NOT be tempted to cheat and use a compiler for this task.
Once you have been able to translate each of the following two programs written in Hack Assembler into binary machine code, Load your machine language program into the cpu simulator and execute it
For your assignment post a description of YOUR process to convert the assembler symbols into machine language and what you learned in the process. Also include both your assembler program and corresponding machine language program in your assignment.
Program to convert to machine language
Computes R
@
DA
@
DDA
@
MD
Program to convert to machine language
Symbolless version of the Max.asm program.
@
DM
@
DDM
@
D;JGT
@
DM
@
;JMP
@
DM
@
MD
@
;JMP
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