Generic 8 bit file upload

git-svn-id: http://mist-board.googlecode.com/svn/trunk@285 09e24ad8-4d60-248f-2a69-0640dc2d1da9
ZX81 able to run tetris (and more)

git-svn-id: http://mist-board.googlecode.com/svn/trunk@286 09e24ad8-4d60-248f-2a69-0640dc2d1da9
updated a2600 core to support loading roms from sd card.

git-svn-id: http://mist-board.googlecode.com/svn/trunk@287 09e24ad8-4d60-248f-2a69-0640dc2d1da9
updated readme.txt

git-svn-id: http://mist-board.googlecode.com/svn/trunk@288 09e24ad8-4d60-248f-2a69-0640dc2d1da9
import the amiga_boot binaries and verilog files. Needed to compile the minimig core.
Create README.md
added frogger pace core (no sound, rotated 90 degrees)
Minimig FSB140414: fixed the mighty sprite collision detection.