6809 lwtools

Assembler for 6809
get lwtools here

experimental source on github
download 4.15, extract, build and install.
shell asm will assemble the source

Check downloads in the white tower
Here follows some sample output from the assembler but the drupal rendition is (with current default settings) not much short of awful.

( testmjh.asm):00001 ; http://www.classiccmp.org/dunfield/pet/sp6809as.pdf
( testmjh.asm):00002 org $1000
( testmjh.asm):00003 ; xref putchar_
( testmjh.asm):00004
1000 8661 ( testmjh.asm):00005 lda #'a
1002 B78000 ( testmjh.asm):00006 sta $8000
1005 D609 ( testmjh.asm):00007 ldb 9
1007 3D ( testmjh.asm):00008 mul
( testmjh.asm):00009 ; jsr putchar_
1008 3F ( testmjh.asm):00010 quit swi
( testmjh.asm):00011
1009 68656C6C6F ( testmjh.asm):00012 fcc "hello"
100E 00 ( testmjh.asm):00013 fcb 0
( testmjh.asm):00014 struct1 STRUCT
0000s ( testmjh.asm):00015 field1 rmb 2
0002s ( testmjh.asm):00016 field2 rmb 3
0005s ( testmjh.asm):00017 ENDSTRUCT
( testmjh.asm):00018 end

Symbol Table:
[ G] quit 1008
[ G] sizeof{struct1} 0005
[ G] struct1.field1 0000
[ G] struct1.field2 0002