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Intel A80386DX-20 CPU die image. The Intel 386, originally released as the 80386 and later renamed i386, was the first x86 32-bit microprocessor designed by Intel.Pre-production samples of the 386 were released to select developers in 1985, while mass production commenced in 1986.
LOADALL is the common name for two different, undocumented machine instructions of Intel 80286 and Intel 80386 processors, which allow access to areas of the internal processor state that are normally outside of the IA-32 API scope, like descriptor cache registers.
Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts.
C&T also developed a 386-compatible processor known as the Super386. This processor supports, in addition to the basic Intel 386 instruction set, a number of instructions to support the Super386-specific "SuperState V" system-management feature. The added instructions for "SuperState V" are: [7]
Unreal mode is used by BIOS code as this is the initial mode of modern Intel processors. [8] Furthermore, the System Management Mode (SMM) in Intel 386SL and later processors places the processor in huge real mode. [9] Some boot loaders (such as LILO) use the unreal mode to access up to 4 GiB of memory.
L2D (AMD K6 only: L2 Cache Disable) 5-7 Reserved, Read as Zero 8 LME (Long Mode Enable) 9 Reserved 10 LMA (Long Mode Active) 11 NXE (No-Execute Enable) 12 SVME (Secure Virtual Machine Enable) 13 LMSLE (Long Mode Segment Limit Enable) 14 FFXSR (Fast FXSAVE/FXRSTOR) 15 TCE (Translation Cache Extension) 16 Reserved 17
TR6 was the test command register, and TR7 was the test data register. The 80486 provided three additional registers, TR3, TR4 and TR5, for testing of the L1 cache. TR3 was a data register, TR4 was an address register and TR5 was a command register. These registers were accessed by variants of the MOV instruction. A test register may either be ...
Intel's second generation of 32-bit x86 processors, introduced built-in floating point unit (FPU), 8 KB on-chip L1 cache, and pipelining. Faster per MHz than the 386. Small number of new instructions. P5 original Pentium microprocessors, first x86 processor with super-scalar architecture and branch prediction. P6