INTEL 486SX

Domain	Definition
Computing	Intel 486SX An Intel 486DX microprocessor with its floating-point unit disconnected. All 486SX chips were fabricated with FPUs. If testing showed that the CPU was OK but the FPU was defective, the FPU's power and bus connections were destroyed with a laser and the chip was sold cheaper as an SX, if the FPU worked it was sold as a DX. [Was this true of all 486SX chips?] Some systems, e.g. Aopen 486SX, allowed a DX to be plugged into an expansion socket. A board jumper would disable the SX which was hard to remove because it was surface mounted. Some SX chips only had a 16-bit wide external data bus. The DX has a pin to select the data bus width (16 or 32). On the smaller SX, that line is hard-wired to 16 inside the package. This is similar to the 286 SX, which was a 16-bit processor with an 8-bit external data bus. The Jargon File claimed that the SX was deliberately disabled crippleware. The German computer magazine, "c't", made this same theory the basis of an April Fools Joke. They claimed that if one drilled a hole of a specified diameter through the right point on a SX chip, this would brake the circuit that disables the FPU. Some people actually tried (and then bought themselves new processors). (1997-02-14). Source: The Free On-line Dictionary of Computing.
Source: compiled by the editor from various references; see credits.

Anagrams: INTEL 486SX

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "4-6-8-e-i-l-n-s-t-x"
	-4 letters: elints, enlist, inlets, ixtles, listen, silent, tinsel.
	-5 letters: elint, exist, exits, inlet, inset, islet, istle, ixtle, lenis, lexis, liens, lines, lints, neist, nites, nixes, senti, silex, sixte, stein, stile, tiles, tines.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.