I bought myself one of these boards to play with RetroBSD a few months back but with build issues & other distractions in real life I didn’t get very far because the stock MAX32 kernel configuration is for SD card slots wired to the board whereas I was trying to use the SD card slot on an ethernet shield. This resulted in the kernel not being able to detect the SD card, hence no root file system. I’d use prebuilt binaries without trying to build my own but for some reason there is no prebuilt kernel image for the configuration I require. Finally, tonight I managed to get a MAX32-ETH kernel built & flashed onto the board, still unable to build the userland but I was able to get an older prebuilt image from the RetroBSD Autobuild Server which currently has images for build 860 & 778.
Will follow up once I have everything building from scratch.
Building RetroBSD on Mac OS X
2.11 BSD Unix for PIC32, revision 892 build 1:
Compiled 2014-03-29 by xxx@xxx.xxx:
/usr/local/retrobsd/sys/pic32/max32-eth
cpu: 795F512L 80 MHz, bus 80 MHz
oscillator: XT crystal, PLL div 1:2 mult x20
console: tty0 (5,0)
sd0: port SPI2, select pin C14
sd0: type SDHC, size 15339520 kbytes, speed 13 Mbit/sec
phys mem = 128 kbytes
user mem = 96 kbytes
root dev = rd0a (0,1)
root size = 163840 kbytes
swap dev = rd0b (0,2)
swap size = 2048 kbytes
temp0: allocated 47 blocks
/dev/rd0a: 576 files, 8644 used, 154555 free
temp0: released allocation
Starting daemons: update cron
2.11 BSD UNIX (pic32) (console)
login: