#!/bin/bash
#set -x

#ARGS="X:1:1 Y:1:1 A:2:2"
ARGS="\$0313:1:0"
ARGS="$@"

for arg in $ARGS
do
  IFS=: read offset inc freq <<< $arg
#  echo offset=$offset inc=$inc freq=$freq

  # spit out preamble 
  cat <<EOF

.alias MEMSTART \$0000
.alias CODE     \$0200 
.alias RESETVEC \$FFFC

.alias MEMEND   \$FFFF

.org MEMSTART    
.advance CODE  
START:  CLC 
        LDA   #\$00
LOOP:   ADC   #${inc}
EOF

  # endof of preamble

  # sets now put the value into the right location in the state
  # vector
  # ADD transfer to destination here skip if A
  #  TAX if X
  #  TAY if Y
  #  STA ADDR if memory

  case $offset in
      "X")
	  echo "        TAX"
	  ;;
      "Y")
          echo "        TAY"
	  ;;
      "A")    ;;
      *)      echo "        STA   $offset"
              ;;
  esac

  # now add the number of nops we require 
  for ((i=0; i<$freq; i++)); do
      echo "        NOP"
  done

  # body of code is done now spit out the ending
  cat <<EOF
	JMP   LOOP 
.advance RESETVEC
.word START
	
.advance MEMEND
.byte \$00
EOF

done