Dunno about my 840AV offhand but the NuBus Card in front of me:

SuperMAC

c1992 STORM TECHNOLOGY, INC.

. . . has two DSPs on it that say:

45871

C 88 AT&T M

WE DSP16A

M14 033

9232S 40

. . . on them.

I also have the Storm Technology Software package for it, might be PicturePress, I got that from macmetex a while back.

Do they match the 840AV DSP spec?