On May 14, 1992, Texas Instruments licensed Cyrix‘s 486SLC and 486DLC technologies. The agreement allowed Cyrix to use Texas Instruments’ manufacturing facilities, and for TI to create derivative chips from Cyrix’s technology. In the end, TI didn’t make as many chips for Cyrix as SGS-Thomson or IBM did, but TI did end up making interesting derivatives of Cyrix’s CPUs, including the 486SXL-40, the fastest 386-class CPU ever made. But without the burst transfer feature that Intel and AMD 486s have, none of TI’s 486s ended up performing quite up to par with an Intel or AMD 486.

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.










