TCSS371 – Machine Organization Final Exam Study Guide
50 Points Duration: 120 Minutes
Name _______________________ This exam is Closed book and Closed computer except for a double-sided letter sized paper for reference, a scientific calculator, and LC3 Instruction sheet (provided on exam). The reference paper maybe typed or hand written. During the exam, write legibly. Show your work where necessary. Mobile phones may not be used during the exam and must be placed out of sight silenced or turned off and you may not leave the classroom once exam starts.
Focus on the topics below. Slides, Quizzes, Practice Problems, Home works and the following Chapters are a good place to start.
Chapter 5 LC3 ISA – Memory Organization, Registers, Opcodes, data types, addressing modes
Operate Instructions – ADD, AND, NOT Data Movement Instructions – LD, LDR, LDI, ST, STR, STI, LEA PC Relative Addressing mode for 9 bits, 6 bits
Control Instructions – BR, JMP, TRAP LC3 Datapath
Chapter 7 Assembly Language Instruction format Converting to machine instructions from assembly and vice versa Troubleshooting assembly language Pseudo ops – .ORIG, .END, .BLKW, .FILL, .STRINGZ Trap codes – HALT, IN, OUT, GETC, PUTS Symbol tables, assembler (first pass, second pass)
Chapter 8 IO Memory Mapped vs Special Instructions Asynchronous vs synchronous transfer Polling vs Interrupts KBSR, KBDR, DSR, DDR – How they are set and used? Interrupt-Driven I/O
Chapter 9 Trap Routines & Subroutines LC-3 Trap Mechanism TRAP, RET Instructions Trap Routines, x20, x21, x22, x23, x25 Saving and Restoring Registers
Subroutines JSR, JSRR Instructions, Purpose of R7
Chapter 10 Stack Stack Policy (LIFO), operations – PUSH, POP Stack Overflow and Underflow detection Interrupt Driven I/O with Stacks – PSR, Supervisor Stack, SSP, USP, Purpose of R6 RTI Instruction
(Extra Credit) Higher Level programming to Assembly
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machine organization was first posted on March 19, 2020 at 10:44 am.
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