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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. whitequark‏ @whitequark 31 Jan 2019
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      good news: I found that this flex can be fixed... well ok, the only thing that can fix it is an incinerator, but i "fixed" by cutting off the end of it, peeling the adhesive mask, and replacing the backing good news #2: almost all keyboard columns work bad news: spacebar doesn't

      3 replies 0 retweets 18 likes
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    2. whitequark‏ @whitequark 31 Jan 2019
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      i'm not sure what is worse, that i feel compelled to fix this stuff, or that i keep finding absolutely horrible ad-hoc ways to make it work for a few hours longer than it's supposed to

      5 replies 0 retweets 22 likes
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    3. whitequark‏ @whitequark 31 Jan 2019
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      it looks like -most- of the keys were broken because the flex cable connected to keyboard columns oxidized to hell. I managed to make that work. however, -spacebar specifically- only works in some positions on the flex cable, i.e. the design failure of the keyboard assy broke it

      2 replies 0 retweets 5 likes
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    4. whitequark‏ @whitequark 31 Jan 2019
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      THE FLOPPY DRIVE I HAVE IN THE LAPTOP CANNOT READ 1.44M FLOPPY DISKS IT'S TOO OLD

      1 reply 1 retweet 19 likes
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    5. whitequark‏ @whitequark 31 Jan 2019
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      the BIOS only starts up if I configure the floppy as a 1.2M drive (what the hell is an 1.2M floppy drive?!), and if I try to read my 1.44M floppy, DOS makes an utterly reprehensible sound and asks me "Abort, Retry, Fail?" where all three options do the same thing brilliant

      7 replies 1 retweet 17 likes
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    6. whitequark‏ @whitequark 31 Jan 2019
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      well surely I can format my existing floppies as 1.2M... "Invalid media or Track 0 bad - disk unusable" oh for fuck's sake

      5 replies 0 retweets 7 likes
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    7. whitequark‏ @whitequark 31 Jan 2019
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      to reiterate, I've tried every option the BIOS has and it refuses to do anything with the floppy drive unless it's set to 1.2M -- that means 360K, 720K, 1.44M don't work. sadly it looks like DOS doesn't understand 1.2M 3.5" floppies, which is probably why floppy was turned off

      2 replies 0 retweets 9 likes
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    8. whitequark‏ @whitequark 31 Jan 2019
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      if I format a HD floppy as 1.2M, select the 1.2M option in BIOS and then try to read it in the laptop, it makes a different, slightly less reprehensible sound and complains of "General failure reading drive A"...

      3 replies 0 retweets 4 likes
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    9. whitequark‏ @whitequark 31 Jan 2019
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      oh I figured out why this failed--this failed because the `ufiformat` utility I use to format the floppies from my modern Linux system thinks that formatting a 3.5" to 1.2M is literally the same as formatting to 1.44M but you omit some sectors that... that's not how it workspic.twitter.com/FGbfYUluf7

      3 replies 1 retweet 18 likes
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    10. whitequark‏ @whitequark 31 Jan 2019
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      i wondered if i could plug a modern LBA drive into it (the smallest I could find at the nearest junk shop is 40 GB) and the answer is "hell no" because it has a FIXED NUMBER OF DRIVE GEOMETRIES it doesn't let you set C/H/S explicitly!! it has like twenty options to choose from!

      4 replies 0 retweets 20 likes
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      Hector Martin‏ @marcan42 31 Jan 2019
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      Replying to @whitequark

      Most LBA drives expose the max C/H/S, right? I wonder if you could pick some random option and "simply" end up with a drive that works but addresses data weirdly.

      4:22 AM - 31 Jan 2019
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        1. whitequark‏ @whitequark 31 Jan 2019
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          Replying to @marcan42

          it looks like when BIOS tries to read anything from this drive it just hangs. also I found the datasheet and it... doesn't talk about CHS geometry -at all- (Toshiba MK4032GAX)

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