https://github.com/yehiashaarawy/modified-sic-assembler

A modi-SIC disassembler is a program that translates machine code (HTE record) into an assembly code for the Modified Simplified Instructional Computer (modi-SIC).
https://github.com/yehiashaarawy/modified-sic-assembler

java mid-sic-disassembler modi-sic sic sic-xe

Last synced: 7 days ago
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A modi-SIC disassembler is a program that translates machine code (HTE record) into an assembly code for the Modified Simplified Instructional Computer (modi-SIC).

• Host: GitHub
• URL: https://github.com/yehiashaarawy/modified-sic-assembler
• Owner: YehiaShaarawy
• Created: 2023-11-18T01:55:16.000Z (about 1 year ago)
• Default Branch: master
• Last Pushed: 2023-12-16T17:21:08.000Z (about 1 year ago)
• Last Synced: 2024-11-15T23:23:38.590Z (about 1 month ago)
• Topics: java, mid-sic-disassembler, modi-sic, sic, sic-xe
• Language: Java
• Homepage:
• Size: 11.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Modi-SIC Disassembler

It is a program that translates machine code (HTE record) into an assembly code for the Modified Simplified Instructional Computer (modi-SIC).

# Instruction Set



# Instruction Format

## Format 1

|OPCODE (8 Bits)|

|---|

## Format 3

All Type 3 instruction could be immediate instructions this is done by a new division of bits of instructions of Type 3 (Format 3) as shown in following table.

|OPCODE (7 Bits)|Immediate Flag [i] (1 Bit)|Indexing Flag [x] (1 Bit)|Address (15 Bits)|

|---|---|---|---|

The modification applied on the opcode as



Only opcode is represented as 7 bits (not 8) as in SIC

The 8th bit of the opcode represents the immediate flag (i) which has two value



a. 0 if the instruction without immediate value (has an address) 


b. 1 if the instruction with immediate value





# Implementation

### Input

It takes as an input a text file (in.txt) that contains modi-SIC machine code (modi-SIC HTE record). 


Remember that The modi-SIC HTE record will be modified to accept also object code of Format 1 instruction of SIC/XE.

### Output

A generated symbol table file (symbolTable.txt) for all the symbols extracted from the HTE record.



A generated assembly code file (assembly.txt) which contain three columns ordered from left as location counter, the assembly code, and object code.