decoration decoration
Stories

GROKLAW
When you want to know more...
decoration
For layout only
Home
Archives
Site Map
Search
About Groklaw
Awards
Legal Research
Timelines
ApplevSamsung
ApplevSamsung p.2
ArchiveExplorer
Autozone
Bilski
Cases
Cast: Lawyers
Comes v. MS
Contracts/Documents
Courts
DRM
Gordon v MS
GPL
Grokdoc
HTML How To
IPI v RH
IV v. Google
Legal Docs
Lodsys
MS Litigations
MSvB&N
News Picks
Novell v. MS
Novell-MS Deal
ODF/OOXML
OOXML Appeals
OraclevGoogle
Patents
ProjectMonterey
Psystar
Quote Database
Red Hat v SCO
Salus Book
SCEA v Hotz
SCO Appeals
SCO Bankruptcy
SCO Financials
SCO Overview
SCO v IBM
SCO v Novell
SCO:Soup2Nuts
SCOsource
Sean Daly
Software Patents
Switch to Linux
Transcripts
Unix Books
Your contributions keep Groklaw going.
To donate to Groklaw 2.0:

Groklaw Gear

Click here to send an email to the editor of this weblog.


Contact PJ

Click here to email PJ. You won't find me on Facebook Donate Paypal


User Functions

Username:

Password:

Don't have an account yet? Sign up as a New User

No Legal Advice

The information on Groklaw is not intended to constitute legal advice. While Mark is a lawyer and he has asked other lawyers and law students to contribute articles, all of these articles are offered to help educate, not to provide specific legal advice. They are not your lawyers.

Here's Groklaw's comments policy.


What's New

STORIES
No new stories

COMMENTS last 48 hrs
No new comments


Sponsors

Hosting:
hosted by ibiblio

On servers donated to ibiblio by AMD.

Webmaster
Not always! | 756 comments | Create New Account
Comments belong to whoever posts them. Please notify us of inappropriate comments.
The True PROM Problem
Authored by: BitOBear on Friday, July 20 2012 @ 05:12 PM EDT
With PROM memory, and with the write-once Gate Arrays, where the programming
voltage actually destroys parts of the original circuit things -do- get a little
iffy.

But in this case, programming is actually more properly the final manufacturing
step.

Argument:

(1) The delivered device is a "blank", incapable of operation.
(2) The device is placed in a "programmer" where the blank is
"machined" by the controlled application of voltages designed to
melt/destroy internal elements to create the "target machine" out of
the "blank".
(3) The device is then removed from the programmer and installed in its
functional position (so function and programming are mutually exclusive modes).

So the prom devices are actually not programmable in the general sense.

[ Reply to This | Parent | # ]

Not always!
Authored by: tiger99 on Friday, July 20 2012 @ 05:27 PM EDT
It may be a minor nit, as we probably represent 0.001% of the FPGA design
community, but in a certain class of safety critical work the FPGA code is
specifically restricted to the lowest level, RTL, or register transfer logic, so
that the final result achieved by the routing tools will be exactly the same as
that prepared by an independent tool. The two are compared for verification, and
differences are not allowed, so we do know exactly which gate in the FPGA is
being used for what function, if we care to delve into the fuse map.

[ Reply to This | Parent | # ]

Groklaw © Copyright 2003-2013 Pamela Jones.
All trademarks and copyrights on this page are owned by their respective owners.
Comments are owned by the individual posters.

PJ's articles are licensed under a Creative Commons License. ( Details )