National Semiconductor Mass Storage Handbook

[Tony Duell]

Does anyone have a National Semiconductor Mass Storage Handbook 
(databook) from around 1989? I am looking for datasheets (or at least 
pinouts) for : 

DP8468
DP8465
DP8455
DP8462
DP8463

Datasheetarchive and Digchip don't have anything, and a google search is 
not helpful.

In case you're curious, I am trying to identify a house-coded part with a 
National Logo that I suspect is one of these devies. 24 pin shrinkdip if 
it helps..

On another subject, has anyone heard of an AMD 8053? 40 pin DIL, I 
suspect it's a derivative of the 8051 microcontorller. No I don't mean 
8035...

-tony