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Re: TASS - Mark IV Bug
- To: firstname.lastname@example.org, email@example.com
- Subject: Re: TASS - Mark IV Bug
- From: firstname.lastname@example.org (Herbert R Johnson)
- Date: Tue, 19 Aug 1997 13:38:05 -0400
- In-Reply-To: <m0x0nar-000k08C@miso.wwa.com>
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- Organization: NJ Computer Connection for Astro Imaging Systems
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- Resent-Date: Tue, 19 Aug 1997 13:47:06 -0400 (EDT)
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On Tue, 19 Aug 1997 07:41:05 -0500 (CDT), email@example.com wrote:
*>The question for you, learned colleagues, is "does shining a
*>light on an EPROM increase or decrease the access time?"
I would guess that the photons inject electrons into the transistor
junctions that drive or are driven by the address and data lines. Maybe
precharging the junctions reduces the dV/dt, i.e. the switching
speed, by reducing the junction potential "width" and thus the capacitiance
C is proportional to dV/dt. Something of this order.
In any case, try faster EPROMS, and covers. Maybe a higher spec version
too, in case they get hot (MIL spec for instance). Good luck!
***** I do not want bulk email. Automated bulk mailings prohibited. ****
Herbert R. Johnson voice/FAX 609-771-1503 day/nite
firstname.lastname@example.org Ewing, NJ (near Princeton) USA
occasional amateur electronic astronomer
supporter of classic computers as "Dr. S-100"
and senior engineer at Astro Imaging Systems: old photons to new bits!