- Mano Example
- Assembly langauge code example below.
- Get the v18 jar file
- Execute the jar file by double-clicking on it.
- Java 7 issues: This jar file was created with Java version
7. If you have having trouble running my simulator, you should
upgrade your computer to Java version 7, and remove previous
versions of Java:
- If double clicking does not work, use a DOS command window,
navigate to the folder containing the jar file (using cd), and
execute the jar file using:
> java -jar ComputerSimulator.class
- Get
the v14 jar file
- get
the v15 jar file
- Definitions of computers
To run the program:
- This Simulator will behave badly on unexpected input, so be
careful!
- Press the "New Computer Simulator" button above to get a new
frame
- Press the "Clear Registers" and "Clear Memory" buttons
- Copy and paste the "Sample Program" code below into the
Assembly Code text area
- Press Assemble
- Note the Symbol Table in the "Assembler Messages" panel, and
the generated code in the "Machine Code" panel
- Press "Load Program From Assembler"
- Note the changes in the "Memory" panel
- Easiest is to select ASCII on the Input and Output panels
- Type something in the Input panel
- BE SURE to end the input stream with a "." - a period.
- Press Reset - resets the PC to the start of the program and
clears some of the flags
- Run the program:
- Next T - state by state, approximately clock tick by clock
tick
- Next I - assembly language instruction to instruction
- Run - go until a Halt is encountered or until the Kill
button is pressed
// Sample Program
// loads chars from input stream
// copies them to output stream
// and memory locations starting at 50
// until target char, ECH, encountered
// will infinite loop if
// input stream does not
// end with a . - period
SETPCSTART 10
ORG 10
LDA ECH // calculates 2's comp
CMA // 1's
comp
INC // 2's
comp
STA ECH // stores 2's of target
FST SKI // look for input
BUN FST // no input
CLA //
clear AC
INP //
input to AC
OUT //
ouput char
STA PTR I // store char
ISZ PTR // inc location
ADD ECH // is it target?
SZA // quit
if target
BUN FST // next char
END HLT // quit
ECH HEX 2E // end character "."
PTR HEX 50 // store chars here
END