The as10k1 is an assembler designed for the emu10k1, the chip present in the SBLive, SB PCI 512 and SB PCI 1024 sound cards from creative. The emu10k1 is a DSP chip geared toward audio signal processing. It contains many common DSP features, such as the MAC instruction, as well as some more exotic feature, such as the TRAM delay-line engine. The first part of this manual will present an overview of the emu10k1's architecture. The second part will cover the as10k1 syntax.
Linux Opensource SBLive Driver (and were you can get as10k1)
Emu10k1 Independent Programmers Site
kX Project Documention section
The Scientist and Engineer's Guide to Digital Signal Processing
dspGuru: DSP Central