As the
32-bitIntel Architecture became the dominant computing platform during the 1980s and 1990s, multiple companies have tried to build
microprocessors that are compatible with that Intel
instruction setarchitecture. Most of these companies were not successful in the mainstream computing market. So far, only
AMD has had any market presence in the computing market for more than a couple of product generations. Cyrix was successful during the
386 and
486 generations of products but did not do well after the
Pentium was introduced.
NexGen – bought by AMD to help develop the successful K6 device
National Semiconductor – low-end 486 (designed in-house) never widely sold; first acquirer of Cyrix, later keeping only low-end
IA-32 devices targeted for consumer
System-on-a-chips, finally selling them to
AMD
Product discontinued/transformed
Harris Corporation – sold
radiation-hardened versions of the 8086 and 80286; product line discontinued. Produced 20 MHz and 25 MHz 80286s (some motherboards were equipped with cache memory, which was unusual for 80286 processors).
NEC – sold processors, such as
NEC V20 and
NEC V30, that were compatible with early Intel 16-bit architectures; product line transitioned to NEC-designed architectures.
Siemens – sold versions of the 8086 and 80286; product line discontinued.
VM Technology – developed VM860 (8086-compatible processor) and VM8600SP (386-compatible processor) for the Japanese market.[1][2][3]
Left the market or closed
Chips and Technologies – left market after failed 386 compatible chip failed to boot the Windows operating system
IBM – Cyrix licensee and developer of Blue Lightning 486 line of processors, eventually left compatible chip market
Rise Technology – after five years of working on the slow mP6 chip (released in 1998), the company closed a year later
ULSI System Technology – never completed x86 SOC; company shut down after one of their employees was convicted for stealing
Intelfloating-point x87 design documents
VLSI Technology - developed 386SX-based "Polar" SoC in collaboration with Intel[13] - cancelled due to low performance and lack of software support[14]
KAIST - developed but did not commercialize Intel-compatible processors HK386 and K486.[15][16]
As the
32-bitIntel Architecture became the dominant computing platform during the 1980s and 1990s, multiple companies have tried to build
microprocessors that are compatible with that Intel
instruction setarchitecture. Most of these companies were not successful in the mainstream computing market. So far, only
AMD has had any market presence in the computing market for more than a couple of product generations. Cyrix was successful during the
386 and
486 generations of products but did not do well after the
Pentium was introduced.
NexGen – bought by AMD to help develop the successful K6 device
National Semiconductor – low-end 486 (designed in-house) never widely sold; first acquirer of Cyrix, later keeping only low-end
IA-32 devices targeted for consumer
System-on-a-chips, finally selling them to
AMD
Product discontinued/transformed
Harris Corporation – sold
radiation-hardened versions of the 8086 and 80286; product line discontinued. Produced 20 MHz and 25 MHz 80286s (some motherboards were equipped with cache memory, which was unusual for 80286 processors).
NEC – sold processors, such as
NEC V20 and
NEC V30, that were compatible with early Intel 16-bit architectures; product line transitioned to NEC-designed architectures.
Siemens – sold versions of the 8086 and 80286; product line discontinued.
VM Technology – developed VM860 (8086-compatible processor) and VM8600SP (386-compatible processor) for the Japanese market.[1][2][3]
Left the market or closed
Chips and Technologies – left market after failed 386 compatible chip failed to boot the Windows operating system
IBM – Cyrix licensee and developer of Blue Lightning 486 line of processors, eventually left compatible chip market
Rise Technology – after five years of working on the slow mP6 chip (released in 1998), the company closed a year later
ULSI System Technology – never completed x86 SOC; company shut down after one of their employees was convicted for stealing
Intelfloating-point x87 design documents
VLSI Technology - developed 386SX-based "Polar" SoC in collaboration with Intel[13] - cancelled due to low performance and lack of software support[14]
KAIST - developed but did not commercialize Intel-compatible processors HK386 and K486.[15][16]