Model 4 mod??

[offensive_Jerk]

Anyone know what this mod is, if it even is a mod? It was between the floppy drive cage and the cpu board.

There is a 128k sticker on the machine

 

[Trash-Eighty]

It seems to be the sound board #8858121 as seen in the Model 4 Technical Reference Manual.

 

[offensive_Jerk]

Thanks! I need to get a copy of that