Creating An Assembler With Assembly Language
     Here is some information and examples about creating 
an assembler with assembly language...

LIBRARY : OpData.zip

LIBRARY : Compiler.zip

; /// MACRO AND PROCEDURE DEFINITIONS USED IN THE Compiler.Asm FILE ////
;;///////////////////////////////////////////////////////////////////////////////////////////////////////

; si = offset textbuffer
ISREG816      PROC
ISSEGREG      PROC

; si = offset textbuffer
ISREG32      PROC
CLEAROPFLAGS      PROC

; si = offset opbuffer
GETDISP      PROC

GETSCALE      PROC
SEARCHSUBINOPCODE      PROC

GETMEMSIZEFLAG      PROC
CLEAROPERANDBUFFERS      PROC

CLEAROPERAND      PROC

; /////////////////////////////////////////////////////////////////////////////////////
; ////////////////  opcode decoding routines  //////////////
; ////////////////////////////////////////////////////////////////////////////////////
; used to check reg to reg opcodes
CHECKREGTOREG      PROC

; ///////////////////// used if only one opcode like cmpsd ////////////////
OPCODEONLY      PROC
TWOOPCODEONLY      PROC

; reverses a registers bytes
; 11223344h becomes 44332211h
; eax = entry
REVERSEREG      PROC

; checks if there is an immediate operand
; si = offset operand  bp = operand index
; output
; dx = 0 if none else dx = 1
; eax = immediate value
; bx = operand type
; bx = 37 imm8
; bx = 38 imm16
; bx = 39 imm32
CHECKIMM      PROC

; scaled opcode
GETSCALEDOPCODE      PROC

; non scaled opcode
GETMEM32OPCODE      PROC
GETMEM16OPCODE      PROC
INOUTOPCODE      PROC
SHOWMPLCODE      MACRO
ISMMXREG      MACRO TEXTBUFFER,REGBUFFER
ISSTREG      MACRO TEXTBUFFER,REGBUFFER

GETOPERANDS      MACRO
GETOPCODEPARAMS      MACRO
GETOVERRIDE      MACRO OPBUFFER
GETADDRMOD      MACRO OPBUFFER
GETMODRMSIB      MACRO
GETMODRMSIBSCALED      MACRO
GETMODRM      MACRO
SEARCHOPCODETABLE      MACRO BUFFER
SHOWOPCODEPARAMS