Added Makefile and a02.sh shell script

Makefile

@@ -0,0 +1,9 @@
+gccopts=-Wno-format-extra-args
+incfiles=common.c files.c label.c asm.c parse.c vars.c expr.c cond.c stmnt.c include.c
+mainfile=c02.c
+outfile=c02 
+c02: ${incfiles} ${mainfile} 
+	gcc ${gccopts} ${incfiles} ${mainfile} -o ${outfile}
+clean:
+	rm *.o ${outfile}
+

a02.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+#Assemble C02 Program
+
+#Check for Command Line Argument
+if [[ "$1" = "" ]]; then
+  echo "Usage: $SNAM file[.asm]"
+  exit
+fi
+
+#Split File Name Parts
+FSPC=$1;          #File Spec
+FNAM=${FSPC%.*};  #File Name without Extension
+FEXT=${FSPC##*.}; #File Extension
+
+#Assemble ASM File
+dasm $FNAM.asm -f3 -o$FNAM.bin -l$FNAM.lst -s$FNAM.sym
+ESTS=$?; #Exit Status
+if [[ $ESTS -ne 0 ]]; then
+  echo "Error compiling file $FNAM.asm"
+  exit $ESTS
+fi 
+
+#Report Successful Completion
+echo "Successfully assembled file $FSPC"