You might try asking this question to the HC11/HC12 mailing list.

     Here's some info to help you find the list:

     >To unsubscribe, send mail to Majordomo@www.mcu.motsps.com. In the
     >message body, put    unsubscribe mot-68hc11-apps
     >http://www.mcu.motsps.com/lit/faq/major.html#zubscribe

     So send subscribe to Majordomo@www.mcu.motsps.com.

     Jon Bertrand
     jonb@cirris.com