this post was submitted on 10 Jun 2024
702 points (99.0% liked)
Technology
59652 readers
5056 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related content.
- Be excellent to each another!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, to ask if your bot can be added please contact us.
- Check for duplicates before posting, duplicates may be removed
Approved Bots
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
They really, really, should be doing A/B systems. Or just have an absolutely minimum loader that can load from EPROM/flash or USB so when the system storage gets messed up, you can still launch the updater from USB. That bios loader doesn't need to know more than how to talk to storage and shovel bytes to the CPU, maybe blink a LED, it's simple enough to be able to be actual ROM, never needing to be updated.
Wait, no: SD cards can talk SPI... it's not going to be fast but it's only a few megs anyway. The EPROM or Flash you're using probably speaks SPI, already. You could literally make a system which can load the BIOS from SD card for the cost of a card cage and maybe a jumper. You could have gigabytes of bios storage for three bucks by using off the shelf cheap SD cards, forget A/B storage you could do the whole bloody alphabet and people could replace the thing easily.
Here's some extra fun: there's a decent chance that you only need a cable with JST or DuPont connectors. I've seen a fair number of laptop motherboards with unused SPI headers/connectors just hanging out. My understanding being that they're for possible accessories or, literally for flashing/debugging the bios.