I just received a pretty large package.

That's 750 8-positions DIP switches.

with 24-bits words, that's approx. 256 instruction words, or 4 boards of 64 instructions...

Or 8 boards of 32 instructions, to fit in a 16×20cm board :

However there's a little gotcha:

The DIP package must be slightly too large because they don't fit well on a 2.54mm pitch board.

Once again this proves that you must have your definitive parts before you commit to a final design ! I'll have to adjust the snap grid size when I do the PCB layout. This also shatters my hope to make a nice compact prototype, 2.4mm will be lost for every row...