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- Path: sparky!uunet!sun-barr!cs.utexas.edu!usc!noiro.acs.uci.edu!balboa.eng.uci.edu!gkwan
- From: gkwan@balboa.eng.uci.edu (Greg Kwan)
- Subject: Re: Programming 68705P3
- Nntp-Posting-Host: balboa.eng.uci.edu
- Message-ID: <2A89DD30.24490@noiro.acs.uci.edu>
- Newsgroups: sci.electronics
- Organization: University of California, Irvine
- Lines: 17
- Date: 13 Aug 92 03:55:28 GMT
- References: <1992Aug08.194203.15660@ssc.wa.com> <2A86F013.2535@noiro.acs.uci.edu> <1992Aug12.061702.12388@ssc.wa.com>
-
- In article <1992Aug12.061702.12388@ssc.wa.com> markz@ssc.wa.com (Mark Zenier) writes:
- >In article <2A86F013.2535@noiro.acs.uci.edu> gkwan@balboa.eng.uci.edu (Greg Kwan) writes:
- >>In article <1992Aug08.194203.15660@ssc.wa.com> markz@ssc.wa.com (Mark Zenier) writes:
- >>> (Trick number 1, the chip's eprom erases to (as I remember) 0
- >>Actually all unused bytes should be $FF.
- >No. Zero. I had to look at 3 different books before I found this
- >in the 1984 spec. sheet. It's not in the latest Microprocessor
- >Databook I have, nor in the old Users Manual.
-
- I checked. I erred. I'm sorry.
-
- Regular EPROM's erase to $FF; Motorola's MCU EPROM erases to $00 (this
- info is from S. J. Cahill's book _The Single Chip Microcomputer_).
- Sorry for my confusion.
-
- greg
- gkwan@balboa.eng.uci.edu
-