On 06/08/2019 17.33, Juan Erbes wrote:
El lun., 5 ago. 2019 a las 21:51, Carlos E. R. (<>) escribió:
On 06/08/2019 02.09, Juan Erbes wrote:
GIGABYTE retira el soporte para PCIe 4.0 de sus placas base AMD anteriores a X570
https://hardzone.es/2019/08/05/gigabyte-pcie-4-0-placas-amd-b350-b450-x370-x...
Yo consideraba por mi experiencia personal a GIGABYTE como la mejor marca de mobos, pero......
Sabías que el Boeing 737 MAX usa para el computador de control de vuelo un 286, que se supone que está descatalogado?
Si algo es necesario, se fabrica, aunque esté obsoleto.
Le erraron, NO ES INTEL!:
Hombre, ya supongo que no es el chip fabricado por Intel, sino un competidor que lo hace, quizás bajo licencia.
The superscalar 29050 version in 1990 integrated a redesigned FPU (4 instructions could be dispatched to execute out of order and speculatively).
Honeywell and the 29050
AMD discontinued the 29K series completely in 1995. This is most likely due to the development of the K5 and K6 processors. There were some issues with discontinuing the 29K as many were being used in mission critical fields (aviation mainly). To avoid hasseling with the FAA and having to provide support for a product they no longer were going to make, AMD sold the 29050 design to Honeywell, a well known aerospace and defense company.
Honeywell used and still uses the 29050 (implemented in an ASIC) in its Versatile Integrated Avionics package (known as a VIA). The VIA is responible for data logging, data display, and control of many subsystems on an aircraft. Each section (Core Proccessing Module - CPM) of a VIA implements a pair of 29050s (HI-29KII as they are known at Honeywell). The CPUs are setup in a system known as voting. All outputs (address, data and control) are ran through a comparator, if each CPU sends out the same signals then the system continues. if the signals do NOT match then there is a fault, and the sytem enters an error mode where it logs the error, and attempts to recover. This is a very common set-up on a mission critical device such as flight computers.
Currently the following planes implement a VIA using the 29050:
Boeing 777 - All Models Boeing 737-600/700/800 Boeing 717 Federal Express MD-80s US Airforce KC-10 US Airforce C5B Galaxy
No, no puede ser que confundan un Intel 286 con un AMD Am29000. O es otro avión, o es otro uso. Tu artículo no cita al MAX. https://en.wikipedia.org/wiki/AMD_Am29000 https://www.i-programmer.info/news/91-hardware/12919-boeing-737-max-software... ............. It is difficult to find out the exact nature of the computers in use, but it is suggested that a dual 80286 with CPUs from different manufacturers is the most likely. There are two of these systems and either are capable of handling the demands of the plane in most situations. However according to one ex-Boeing engineer: The 737 dual-dual architecture is very unique. The decision to make speed trim single channel, single processor goes back to the 737 classic. The MCAS function is just another FCC software module that behaves, at a high level, like speed trim, whose architecture would have then been replicated. This seems to be saying that the MCAS system that is being revised only runs on one of the processors in one of the systems. A 80286 is an old processor, circa 1986, with a single core running at 20MHz or so. Es difícil averiguar la naturaleza exacta de los ordenadores en uso, pero se sugiere que lo más probable es un 80286 dual con CPUs de diferentes fabricantes. Hay dos de estos sistemas y cualquiera de ellos es capaz de manejar las demandas del avión en la mayoría de las situaciones. Sin embargo, según un ex ingeniero de Boeing: La arquitectura dual-dual del 737 es muy singular. La decisión de hacer el ajuste de velocidad de un solo canal, un solo procesador se remonta al clásico 737. La función MCAS es sólo otro módulo de software de la FCC que se comporta, a un alto nivel, como el ajuste de velocidad, cuya arquitectura habría sido replicada. Esto parece indicar que el sistema MCAS que se está revisando sólo funciona en uno de los procesadores de uno de los sistemas. Un 80286 es un antiguo procesador, alrededor de 1986, con un solo núcleo funcionando a 20MHz aproximadamente. Traducción realizada con el traductor www.DeepL.com/Translator .............++- Mira, aquí un comentario de hace once años, sobre el B777, en un foro de aviones: «The B777 uses an Intel 80486 chipset, an AMD 29050 and a Motorola MC68040» https://www.airliners.net/forum/viewtopic.php?t=757423 «El B777 utiliza un chipset Intel 80486, un AMD 29050 y un Motorola MC68040» O sea, un sólo avion usando procesadores de las tres marcas, siempre muy antiguos. -- Cheers / Saludos, Carlos E. R. (from 15.0 x86_64 at Telcontar)