Old chip data needed: "ESS Technology" ES1488 - early AudioDrive chip (little info on the web!)

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Hi.
Did ESS publish any databooks/CDROMs during the mid-to-late 1990's??
They made a whole series of chips dubbed 'AudioDrive', with
increasingly advanced features, but the ES1488 was one of the first -
sometimes found in old 486 -class notebooks (eg. DEC Hinote Ultra,
Daewoo DN7400).
It's in a 52-pin QFP surface-mount package, IIRC.

I'm looking for at least an annotated pinout, if not a complete
datasheet... anyone!?

TIA - Mark.

 

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Still looking :-(
- any 1990's ESS employees who could help!

 

[[email protected]]

Still looking :-(
- any 1990's ESS employees who could help!

Such employees, and employees of OEMs who used the AudioDrive, would
still be under NDA. That material was very difficult to get hold of.
ESS is a multimedia company and publishes very little information for
public dissemination.

What do you need to know that you can't learn from reverse engineering?