pseudo-assembler-implementation-in-c's Introduction

pseudo-assembler-implementation-in-C

Description

This application simulates an assembler: it receives input files written in a pseudo predefined assembly language, parses them, separating data section from code section, managing symbols table, internal and external refereneces, etc, converts it to binary code and then finally produces as output the object file in hexa-decimal base code, error report file (if any), entry file, and external reference file.

Further Details

See Project Description for a complete decsription of the application requirements specification.

Assembly Input File Example

.entry LOOP
.entry LENGTH
.extern L3
.extern W
MAIN:    mov ~(K,END), W
add r2,STR
LOOP: jmp             L3
prn #-5
sub #1, r1
inc r0
mov ~(STR,MAIN), r3
bne L3
END: stop
STR: .string "abcdef" 
LENGTH: .data 6, -9, 15
K: .data 2

Output Object File Example

	Base 16 Address 	 Base 16 machine code

                             14    B
      64 					 824
      65 					 078
      66 					 001
      67 					 8B4
      68 					 100
      69 					 1E2
      6A 					 644
      6B 					 001
      6C 					 700
      6D 					 FEC
      6E 					 8FC
      6F 					 090
      70 					 5CC
      71 					 000
      72 					 82C
      73 					 050
      74 					 00C
      75 					 684
      76 					 001
      77 					 3C0
      78 					 061
      79 					 062
      7A 					 063
      7B 					 064
      7C 					 065
      7D 					 066
      7E 					 000
      7F 					 006
      80 					 FF7
      81 					 00F
      82 					 002

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