For the CoCo 3 all former EXEC &HC000 to start pak software become an EXEC &HE010 command, that should get your RS232 ROM going. -- RP On Sat, Mar 17, 2012 at 10:57 AM, Bill <cwgordon at carolina.rr.com> wrote: How do I access the RS232 pak with a coco3? The booklet says &HC000, but > that makes the Coco3 go to LALA land >