it probably sounds like a powermac 6500 start up chime, that is because the board is a powermac 6500 board
now if i were to of been a little more adventurous i could have desoldered the ROM slot from the proto TAM board
and soldered it onto the 6500 board and tried to use that proto ROM simm. then probably your mac chime would have became
the tam one? that is if the rom simm actually works… but i didn't want to get too crazy with that proto board ...
also that other tam proto board i fixed for you… the one that i soldered the 6400 roms onto.
what mac tone did that one make?
if it made the tam sound then that tells me something between the rom and mainboard, even though they were 6400 roms
still knew it was a tam board and played the TAM bong.
witch means probably you could make any 6400 - 6500 play the TAM bong if you were crafty enough like maybe dougg3