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- Newsgroups: sci.electronics
- Path: sparky!uunet!van-bc!nwnexus!ole!ssc!markz
- From: markz@ssc.wa.com (Mark Zenier)
- Subject: Re: Programming 68705P3
- Organization: SSC, Inc., Seattle, WA
- Date: Wed, 12 Aug 1992 06:17:02 GMT
- Message-ID: <1992Aug12.061702.12388@ssc.wa.com>
- References: <wzxm9y-.n1gak@netcom.com> <1992Aug08.194203.15660@ssc.wa.com> <2A86F013.2535@noiro.acs.uci.edu>
- Lines: 24
-
- 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, and any unused bytes in the image should be the
- >>same value, as the boot rom skips programming those. Much faster.)
-
- >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.
-
- >FWIW: I bought (10) of the P3 parts for $6 each but recently saw an
- >ad in _Nuts and Volts_ selling them for $2.95 ea. Other (hobbyist)
- >sources sell 'em for ~$12-15. They are easier to obtain than Mot's
- >HC05 family.
-
- Vetco (the Seattle areas newest and only remaining electronic surplus
- store) 206-869-7025. I bought a tube full there, but havn't had time to
- check them out.
-
- Mark Zenier markz@ssc.wa.com
-
-