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#m68k

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I got uploading to a SRAM working from an Arduino Nano! I have also tested properly resetting the 68008 from the Arduino and changing the pins to pull up. I should probably throw together a tiny bootloader and put a 512K SRAM on instead, and I think perhaps a SPLD or CPLD might replace the mess near the RAM more elegantly - a couple of daisy chained ATF22V10s might work well! It all seems stable at ~6Mhz despite being on a breadboard.

Did you know that #NetBSD #m68k can compile itself from scratch?

How long would you imagine it might take to compile NetBSD 10 from source on real m68k hardware? Earlier this year I wanted to find out, so I set up a Macintosh to try it.

The toolchain, OS and installation sets started on 16-March and finished on 10-May:

build.sh started:    Sat Mar 16 17:04:20 UTC 2024
build.sh ended:      Fri May 10 00:35:54 UTC 2024
4692724.22 real   3810544.56 user    700310.18 sys

That’s 1303 and a half hours, or almost eight weeks, or 54 days.

Installing the OS using build.sh took another four hours (4:08:39).

The kernel took another almost 21 hours (20:55).

That’s a lot of time, but it worked without issues, and the system runs happily!