3 ms·

Here's an article about it. According to this piece, 737 avionics run on a pair of 80286s. https://www.moonofalabama.org/2019/06/boeings-software-fix-for-the-7

Here's an article about it. According to this piece, 737 avionics run on a pair of 80286s. https://www.moonofalabama.org/2019/06/boeings-software-fix-for-the-737-max-problem-overwhelms-the-planes-computer.html https://www.moonofalabama.org/2019/06/boeings-software-fix-f...

seymore_12 7y ago
The should at least get 1202 error..
tyingq 7y ago
If true it uses a 286, for some relative comparison, the fastest 286 is 1.5 MIPS. A run of the mill current Arduino is probably 20 MIPS, and a Raspberry PI3 is 2451 MIPS.
- robin_reala 7y ago
  Can’t find the exact MIPS estimate for the Harris CS80C286 25Mhz 286, but given that the 1.5MIPS was quoted for the 10Mhz Intel one I’d guess it’s substantially faster. Although still slower than an Arduino :)
  - ethbro 7y ago
    I love how HN is taking umbrage in the rest of the comments about Boeing being too aggressive with MCAS et al. redesign. Then taking umbrage here that they were too conservative and possibly froze the hardware spec.
    - tyingq 7y ago
      No umbrage here. Just interesting to me. My Commodore 64 was half a MIP.
    - CydeWeys 7y ago
      The general consensus I've seen here on HN is that Boeing should have done a clean sheet design rather than trying to shoehorn increasingly ill-fitting features into a decades-old design. You're not accurately representing that view.
      - ethbro 7y ago
        http://news.aa.com/news/news-details/2011/AMR-Corporation-Announces-Largest-Aircraft-Order-In-History-With-Boeing-And-Airbus-07202011/default.aspx http://news.aa.com/news/news-details/2011/AMR-Corporation-An... "American also intends to order 100 of Boeing's expected new evolution of the 737NG, with a new engine that would offer even more significant fuel-efficiency gains over today's models. American is pleased to be the first airline to commit to Boeing's new 737 family offering, which is expected to provide a new level of economic efficiency and operational performance, pending final confirmation of the program by Boeing. This airplane would be powered by CFM International's LEAP-X engine." When a customer demands...

seymore_12 7y ago

The should at least get 1202 error..

tyingq 7y ago

If true it uses a 286, for some relative comparison, the fastest 286 is 1.5 MIPS. A run of the mill current Arduino is probably 20 MIPS, and a Raspberry PI3 is 2451 MIPS.

robin_reala 7y ago
Can’t find the exact MIPS estimate for the Harris CS80C286 25Mhz 286, but given that the 1.5MIPS was quoted for the 10Mhz Intel one I’d guess it’s substantially faster. Although still slower than an Arduino :)
- ethbro 7y ago
  I love how HN is taking umbrage in the rest of the comments about Boeing being too aggressive with MCAS et al. redesign. Then taking umbrage here that they were too conservative and possibly froze the hardware spec.
  - tyingq 7y ago
    No umbrage here. Just interesting to me. My Commodore 64 was half a MIP.
  - CydeWeys 7y ago
    The general consensus I've seen here on HN is that Boeing should have done a clean sheet design rather than trying to shoehorn increasingly ill-fitting features into a decades-old design. You're not accurately representing that view.
    - ethbro 7y ago
      http://news.aa.com/news/news-details/2011/AMR-Corporation-Announces-Largest-Aircraft-Order-In-History-With-Boeing-And-Airbus-07202011/default.aspx http://news.aa.com/news/news-details/2011/AMR-Corporation-An... "American also intends to order 100 of Boeing's expected new evolution of the 737NG, with a new engine that would offer even more significant fuel-efficiency gains over today's models. American is pleased to be the first airline to commit to Boeing's new 737 family offering, which is expected to provide a new level of economic efficiency and operational performance, pending final confirmation of the program by Boeing. This airplane would be powered by CFM International's LEAP-X engine." When a customer demands...