First is that the 'easy' way I've found to move data in & out of dosminix is to "mount" a tar file. At the boot loader, you can specify

dosfile-d1=x.tar

This will 'mount' x.tar onto disk #1. Go ahead and 'boot' minix, and then you can extract the x.tar file simply by running tar xf /dev/c0d1

Likewise, you can tar cf /dev/c0d1 then extract x.tar from MS-DOS (NT whatever) to get data out of the minix setup.

When compiling large c files, you'll find that the C compiler will freak because it's out of memory…

The command:
chmem +# /usr/lib/em_cemcom.ansi

will show the maximum memory amount the C compiler can use. You can give it an additional megabyte with:

chmem +102400 /usr/lib/em_cemcom.ansi

When building f2c and dungeon I had to do this a few times..

For those less adventurous I've built f2c, it's library & adventure right here:

http://vpsland.superglobalmegacorp.com/install/f2c/dungeon-2.5.6-i386-minix.zip