https://gunkies.org/index.php?action=history&feed=atom&title=FP750_Floating-Point_Accelerator 2026-05-09T09:27:11Z Revision history for this page on the wiki MediaWiki 1.30.1 https://gunkies.org/w/index.php?title=FP750_Floating-Point_Accelerator&diff=34697&oldid=prev 2024-05-31T14:01:57Z

<p>Ooops, FP780 was elsewhere</p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 14:01, 31 May 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td> <td colspan="2" class="diff-lineno">Line 15:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category: VAX<del class="diffchange diffchange-inline">-11/7xx Systems</del>]]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category: <ins class="diffchange diffchange-inline">DEC </ins>VAX <ins class="diffchange diffchange-inline">Processors</ins>]]</div></td></tr> <!-- diff cache key mediawiki-wiki_:diff:version:1.11a:oldid:34696:newid:34697 --> </table>

Jnc https://gunkies.org/w/index.php?title=FP750_Floating-Point_Accelerator&diff=34696&oldid=prev 2024-05-31T14:00:03Z

<p>typo (use &#039;Show preview&#039;. dummy!)</p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 14:00, 31 May 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td> <td colspan="2" class="diff-lineno">Line 15:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category: <del class="diffchange diffchange-inline">DEC </del>VAX <del class="diffchange diffchange-inline">systemsVAX</del>-11/7xx Systems]]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category: VAX-11/7xx Systems]]</div></td></tr> <!-- diff cache key mediawiki-wiki_:diff:version:1.11a:oldid:34695:newid:34696 --> </table>

Jnc https://gunkies.org/w/index.php?title=FP750_Floating-Point_Accelerator&diff=34695&oldid=prev 2024-05-31T13:59:05Z

<p>Correct cat</p> <table class="diff diff-contentalign-left" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr style="vertical-align: top;" lang="en"> <td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 13:59, 31 May 2024</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l15" >Line 15:</td> <td colspan="2" class="diff-lineno">Line 15:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'>&#160;</td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr> <tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Category: DEC VAX <del class="diffchange diffchange-inline">systems</del>]]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Category: DEC VAX <ins class="diffchange diffchange-inline">systemsVAX-11/7xx Systems</ins>]]</div></td></tr> <!-- diff cache key mediawiki-wiki_:diff:version:1.11a:oldid:34498:newid:34695 --> </table>

Jnc https://gunkies.org/w/index.php?title=FP750_Floating-Point_Accelerator&diff=34498&oldid=prev 2024-05-17T18:07:10Z

<p>Covers the basics</p> <p><b>New page</b></p><div>The '''FP750 Floating-Point Accelerator''' was an optional [[floating point accelerator]] for the [[VAX-11/750]]'s [[KA750 CPU]]; some integer [[instruction]]s were sped up by it as well. The floating point instructions were performed by the [[microcode]] when the FP750 was not installed.<br /> <br /> It was implemented on one [[DEC card form factor|extended hex]] card, the L0001 FPA Floating Point Accelerator (FPA), which mounted in the VAX-11/750 [[backplane]] in slot 1.<br /> <br /> ==Further reading==<br /> <br /> * ''FP750 Floating-Point Accelerator Technical Description'' (EK-FP750-TD) - not online<br /> <br /> ==External links==<br /> <br /> * [http://www.bitsavers.org/pdf/dec/vax/handbook/VAX_Hardware_Handbook_Volume_1_1986.pdf VAX Hardware Handbook Volume 1] - the FP750 is covered in Chapter 4 (pp. 171 of the PDF)<br /> * [https://vt100.net/mirror/hcps/si75fin1.pdf VAX-11/750 Installation Manual] (EK-SI75F-IN-001) - the FP750 is covered in Chapter 6 (pg. 113 of the PDF)<br /> * [https://vt100.net/mirror/antonio/ek-vaxv3-hb-001.pdf VAX Maintenance Handbook VAX-11/750] (EK-VAXV3-HB-001) - the layout of the FP750 is given on pg. 66 (pg. 78 of the PDF), with a description of the custom [[gate array]]s on the following page, and a block diagram on pp. 185-186 (pg. 197-198)<br /> * [https://bitsavers.org/pdf/dec/vax/750/MP01269_FP750_Engineering_Drawings_198112.pdf FP750 Field Maintenance Print Set] (MP01269)<br /> * [https://web.archive.org/web/20071004184622/http://computer-refuge.org/compcollect/dec/vax/11750/L0001-big.jpg L0001 (FPA)] - FP750 Floating Point Accelerator image<br /> <br /> [[Category: DEC VAX systems]]</div>

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