ftp://opensource.creative.com/pub/doc Files: LM4545.pdf AC97 Codec m2049.pdf The EMU10K1 Digital Audio Processor hog63.ps FX8010 - A DSP Chip Architecture for Audio Effects WIPO Patents ------------ freely viewable at http://ep.espacenet.com Patent numbers: WO 9901813 (A1) Audio Effects Processor with multiple asynchronous (Jan. 14, 1999) streams (same as US patent 5,928,342) WO 9901814 (A1) Processor with Instruction Set for Audio Effects (Jan. 14, 1999) (same as patent 5,930,158) WO 9901953 (A1) Audio Effects Processor having Decoupled Instruction Execution and Audio Data Sequencing (Jan. 14, 1999) US Patents (http://www.uspto.gov/) ---------- US 5925841 Digital Sampling Instrument employing cache memory (Jul. 20, 1999) US 5928342 Audio Effects Processor integrated on a single chip (Jul. 27, 1999) with a multiport memory onto which multiple asynchronous digital sound samples can be concurrently loaded US 5930158 Processor with Instruction Set for Audio Effects (Jul. 27, 1999) US 6032235 Memory initialization circuit (Tram) (Feb. 29, 2000) US 6138207 Interpolation looping of audio samples in cache connected to (Oct. 24, 2000) system bus with prioritization and modification of bus transfers in accordance with loop ends and minimum block sizes US 6151670 Method for conserving memory storage using a (Nov. 21, 2000) pool of short term memory registers US 6195715 Interrupt control for multiple programs communicating with (Feb. 27, 2001) a common interrupt by associating programs to GP registers, defining interrupt register, polling GP registers, and invoking callback routine associated with defined interrupt register Another list of creative/emu patents is maintained here: http://ct4830.tripod.com/bekomex/documentation/index.htm