Compatibles

Compatibles
IBM 80386DX 25 MHz with Intel core.

* The AMD Am386DX/SX were more or less an exact clone of the 80386. After being held up in the courtroom for several years, AMD's 40MHz part became very popular with computer enthusiasts as a low cost and low power alternative to the 25MHz 486SX. The power draw was further reduced in the "notebook models" (Am386 DXL/SXL/DXLV/SXLV) which could cope with 3.3V and was implemented in fully static CMOS circuitry.

* Chips and Technologies Super386 38600DX/38600SX was developed using reverse engineering. It sold poorly, due to some technical errors or incompatibilities as well as its late appearance on the market, and was therefore a short-lived product.

* Cyrix Cx486SLC/Cx486DLC can be (simplistically) described as a kind of 386/486 hybrid chip that included a small amount of on-chip cache. It was popular among computer enthusiasts but did poorly with OEMs. The Cyrix Cx486SLC and Cyrix Cx486DLC processors were pin-compatible with 80386SX and 80386DX respectively. These processors were also sold (and manufactured) by Texas Instruments.

* IBM 386SLC and 486SLC/DLC were variants of Intel's design which contained a large amount of on-chip cache (8kb, and later 16kb). The agreement with Intel limited their use to IBM's own line of computers and upgrade boards only, so they were not available on the open market.