ca65 a1basic.s -l a1basic.lst
ld65 -t none a1basic.o -o a1basic.bin

# Create ../a1basic.gcl file
(
echo '{ Generated by: cd a1basic && ./make.sh }'

# Hex dump
od -v -A n -t x1 a1basic.bin |
 fmt -1 |
  awk -v A=57344 '
   NF>0 {
    if(A%16==0)print""
    if(A%256==0)printf"\n*=$%x\n",A
    printf " #$%-2s",$1
    A++}
   END          {print}
  '
) > ../a1basic.gcl