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Wayback Machine
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07 Feb 2006 - 28 Dec 2025
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COLLECTED BY
Organization:Archive Team
Formed in 2009, the Archive Team (not to be confused with the archive.org Archive-It Team) is a rogue archivist collective dedicated to saving copies of rapidly dying or deleted websites for the sake of history and digital heritage. The group is 100% composed of volunteers and interested parties, and has expanded into a large amount of related projects for saving online and digital history.

History is littered with hundreds of conflicts over the future of a community, group, location or business that were "resolved" when one of the parties stepped ahead and destroyed what was there. With the original point of contention destroyed, the debates would fall to the wayside. Archive Team believes that by duplicated condemned data, the conversation and debate can continue, as well as the richness and insight gained by keeping the materials. Our projects have ranged in size from a single volunteer downloading the data to a small-but-critical site, to over 100 volunteers stepping forward to acquire terabytes of user-created data to save for future generations.

The main site for Archive Team is atarchiveteam.org and contains up to the date information on various projects, manifestos, plans and walkthroughs.

This collection contains the output of many Archive Team projects, both ongoing and completed. Thanks to the generous providing of disk space by the Internet Archive, multi-terabyte datasets can be made available, as well as in use by theWayback Machine, providing a path back to lost websites and work.

Our collection has grown to the point of having sub-collections for the type of data we acquire. If you are seeking to browse the contents of these collections, the Wayback Machine is the best first stop. Otherwise, you are free to dig into the stacks to see what you may find.

The Archive Team Panic Downloads are full pulldowns of currently extant websites, meant to serve as emergency backups for needed sites that are in danger of closing, or which will be missed dearly if suddenly lost due to hard drive crashes or server failures.

ArchiveBot is an IRC bot designed to automate the archival of smaller websites (e.g. up to a few hundred thousand URLs). You give it a URL to start at, and it grabs all content under that URL, records it in a WARC, and then uploads that WARC to ArchiveTeam servers for eventual injection into the Internet Archive (or other archive sites).

To use ArchiveBot, drop by #archivebot on EFNet. To interact with ArchiveBot, you issue commands by typing it into the channel. Note you will need channel operator permissions in order to issue archiving jobs. The dashboard shows the sites being downloaded currently.

There is a dashboard running for the archivebot process athttp://www.archivebot.com.

ArchiveBot's source code can be found athttps://github.com/ArchiveTeam/ArchiveBot.

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The Wayback Machine - https://web.archive.org/web/20160809185320/http://www.cpu-world.com/CPUs/80287/
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Search the site / Identify CPU / Quick CPU lookup:

Intel 80287 family

FPU » 80287 family

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At a glance

Type:
floating-point unit
Introduction:
1982
Frequency (MHz):
5 - 12.5
Sockets:
DIP40
PLCC44
Intel 80287 is a co-processor for80286family of processors, and it could also work withIntel 80386 microprocessors. The 80287 hasarchitecture similar toIntel 8087, andit's completely object-code compatible with the 8087 (but notpin-compatible). The number of instructions and execution time ofinstructions for both co-processors is about the same. Maindifference between the 80287 and 8087 co-processors is the way howthe CPU interfaces with the co-processor:
  • The memory and protection unit of main processor validates allfloating-point instructions before passing them to the co-processor.This extra step introduces small delay to execution of FPinstructions. As a result the 80287 runs slightly slower than the8087 at the same frequency.
  • When the main processor executes the floating-point instructions it nowchecks if the co-processor is busy, and, if necessary, will waitfor the co-processor to become available. As a result, it's no longernecessary to add WAIT (FWAIT) instruction before most of the 80287instructions.
  • The 80287 may run asynchronously from the main processor. The 80286 processordivides external clock by 2, while the co-processor divides it by 3. If boththe 80286 and 80287 use the same external clock it results in theco-processor running at the 2/3 speed of the main processor.Nevertheless, the ability to run asynchronously can be used to itsadvantage. Using dedicated external clock for the Intel 80287 it'spossible to run the co-processor at higher frequency than the mainprocessor.

The Intel 80287 was produced at speeds ranging from 5 to 12 MHz.Other companies produced 16 MHz and 20 MHz versions of the FPU.


Die pictures:
Use the filter below to display manufacturers that have specific feature(s) incorporated:

List of 80287 manufacturers

AMD P80C287-12

12 MHz
40-pin plastic DIP

Picture of: AMD P80C287-12

Cyrix CX-82S87-NP-SV

40-pin side-brazed ceramic DIP

Picture of: Cyrix CX-82S87-NP-SV

IIT 2C87-20

20 MHz
40-pin side-brazed ceramic DIP

Picture of: IIT 2C87-20

Intel C80287-10

10 MHz
40-pin side-brazed ceramic DIP

Picture of: Intel C80287-10

Last modified: 7 Aug 2016
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