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- Newsgroups: comp.sys.amiga.hardware
- Path: sparky!uunet!orca!javelin.sim.es.com!blgardne
- From: blgardne@javelin.sim.es.com (Dances With Bikers)
- Subject: Re: Grapevine does something right
- Message-ID: <1992Sep15.004103.14524@javelin.sim.es.com>
- Reply-To: blgardne@javelin.sim.es.com
- Organization: Evans & Sutherland Computer Corporation
- References: <1992Sep10.164305.23576@news.unomaha.edu> <1992Sep11.040626.12175@javelin.sim.es.com> <hSpFr*y70@disaster.hacktic.nl>
- Date: Tue, 15 Sep 1992 00:41:03 GMT
- Lines: 27
-
- rico@disaster.hacktic.nl (Rico Jansen) writes:
-
- >> > o bend pin 38 (whichever one that is I dunno) of Gary chip up
- >>
- >> If you've got a set of "instructions" that tell you to do this, burn
- >> them and find a correct set. Leaving that pin flapping in the breeze can
- >> cause a lot of problems.
-
- >Surely burn them, because its the wrong pin. Its pin 32 on the Gary.
-
- Burn them no matter what pin. (I didn't bother checking pin numbers
- because it's bad advice in any case.)
-
- >Which is called _EXRAM, which means it is for detection of the internal
- >512Kb expansion. This bending means that the internal expansion is not
- >detected, which can also be done with an off-switch on the memory expansion
- >(if it has one).
-
- Yes, _EXRAM has to be disabled, but NOT by leaving a pin floating. The
- only proper way to do the job is cutting the specified trace. By pulling
- the pin you're leaving a floating input which at best will cause erratic
- operation, and at worst could damage the chip.
- --
- Blaine Gardner @ Evans & Sutherland blgardne@javelin.sim.es.com BIX:blaine_g
- 580 Arapeen Drive, SLC, Utah 84108 Favorite road signs:
- Dumper of Dirtbikes #46 FJ1200 Winding Road Next 77 Miles
- My other motorcycle is a Quadracer Caution: Passing Areas Not Marked
-