A Soundblaster DSP based on Intel 80C52 from the beginning of 90's. The die size is large. Each version 4xx has a different firmware burnt in mask ROM.
- 405 : mask rom directly visible
- 412 : needs delayering and probably staining
To be posted
Top metal @ 5x: http://siliconpr0n.org/map/creative_tech/ct1741/mz_neo5x/
Top metal @ 10x: http://www.siliconpr0n.org/map/creative_tech/ct1741_v412/map/