Wnated : Pinout for MC6881 or MC3449

[Tony Duell]

Does anyone have the pinout for the Motorola MC6881 or MC3449 chip? (16
pin DIL package) (Those 2 devices are equivalents, the ones I have are
marked with both numbers.). From what I can tell, it's a triple
bidirectional bus switch. 

They are used in the HP37201 HPIB extender, HP seem to have created 
separate data buses for the memroy and I/O chips. I guess this device is 
on-topic here, mine dates from 1979, a pair of them allow an HPIB bus to 
be fed over various types of serial link, including asynchronous and 
synchronous modems. 

-tony