From: utzoo!decvax!decwrl!sun!megatest!fortune!guzis
Newsgroups: net.micro
Title: Intel 80186 Alert
Article-I.D.: fortune.922
Posted: Wed Apr 13 19:21:12 1983
Received: Thu May  5 15:24:42 1983


If anyone out there is doing development with the Intel 80186 CPU (B-step
chips), be advised that there exists a problem when a DMA request happens
while the CPU is doing a string move (MOVSB, MOVSW).  It seems that the
destination address gets all confused.  I spent 2 weeks with a logic ana-
lyzer and MS-DOS 2.0 trying to find out why my file directories were get-
ting clobbered.

Intel says the problem will be fixed come September when the C-step part
comes out.

I hope this saves someone else from some anguish.


					- Chuck Guzis