Some QBASIC emulation fun :-)

Konami's VRC6 Info - sound info on this chip.
My QBASIC VRC6 player - feed it a register dump and out comes some data.
Konami's VRC7 info - sound info on this chip.
My QBASIC VRC7 simulator w/ reg dumps - play it in real time!
QBASIC file that lets you make a real calculated NES palette.