At 01:57 PM 4/21/00 -0600, Dan Michaels wrote: >I suspect, however, the new '873 still does it the old '73 way [ie, >no shadow mapping]. Yes/no/maybe ????? Yes! The '873, 874 do NOT shadow the upper 16 registers. So you have to do it the old fashioned way like I posted earlier. Quite frankly, I'll probably continue to do so when I graduate to the larger devices since that shadowed RAM could be really useful elsewhere. dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 16 years of Engineering Innovation (1984 - 2000) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email.