Look at this beautiful 1 GHz #Alpha #CPU from an #HP/#Compaq #AlphaServer DS15
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Look at this beautiful 1 GHz #Alpha #CPU from an #HP/#Compaq #AlphaServer DS15.
The underside does not have pins, but holes in which wires end. These wires are touching the contacts on the motherboard. There's no socket whatsoever. Weird design.
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Look at this beautiful 1 GHz #Alpha #CPU from an #HP/#Compaq #AlphaServer DS15.
The underside does not have pins, but holes in which wires end. These wires are touching the contacts on the motherboard. There's no socket whatsoever. Weird design.
@derSammler those are good examples of Ball Grid Array and Land Grid Array, e.g. BGA and LGA cores. The BGA page has examples of many sub-types, and links to the other primary designs, kinda worth a look:
https://en.wikipedia.org/wiki/Ball_grid_array
There's so much fun to be had with old CPU collections, especially vintage alternate types like the Alpha. Sun UltraSparc and PowerPC from the same era also have some beautiful examples.
That DS15 CPU is a classic (https://en.m.wikipedia.org/wiki/Alpha_21264), very interesting early example of using branch prediction calculations to accelerate cache reads vs suffering potential cycle penalties and stack eviction.
> The predictor was used as the Alpha 21264 has a minimum branch misprediction penalty of seven cycles. Due to the instruction cache's two cycle latency and the instruction queues, the average branch misprediction penalty is 11 cycles. The algorithm maintains two history tables, Local and Global...
> The local predictor consists of a 1,024-entry by 10-bit branch history table... Each entry is a 3-bit saturating counter. The value of the counter determines whether the current branch is taken or not taken.
> The global predictor is a single-level, 4096-entry branch history table. Each entry is a 2-bit saturating counter; the value of this counter determines whether the current branch is taken or not taken.
ok ok, enough of this nerdery. there are Alpha 21264 CPUs on eBay if anyone wants to own a piece of this wonderful engineering. https://ebay.us/m/ttryzO
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undefined Eva Winterschön ha condiviso questa discussione
Gli ultimi otto messaggi ricevuti dalla Federazione
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Chiara Castellani finalista
#solidarietà
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#solidarietà
Un riconoscimento letterario a Chiara Castellani per i suoi testi autobiografici e sociali. Impegnata in #Africa è un esempio luminoso di impegno umano e missionario per gli ultimi.
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@tarta ho convinto un collega appassionato dingiochi da tavolo: si è comprato i tre fumetti gioco di Cana su mio suggerimento. 😉
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i see it the same way.
the difference is the user interface.
i've been blogging about this regularly for the last couple of years dan.
here's a piece that explains the big picture.
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ADUC - Editoriale - I danni collaterali nella natura (dis)umana
https://www.aduc.it/editoriale/danni+collaterali+nella+natura+dis+umana_39844.php
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@racheeeeec Mi avevano spiegato che è opinabile la dimensione minima delle carie che ne giustifichi la cura: se troppo piccole, lasciarle stare fa meno danno che allargarne il foro per otturarlo.
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SECURITY AFFAIRS #MALWARE NEWSLETTER ROUND 63
https://securityaffairs.com/182398/malware/security-affairs-malware-newsletter-round-63.html
#securityaffairs #hacking
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@MauroV1968 So di che parli, ci conosciamo anche se solo virtualmente.
