This kind of calling convention supports reentrant and recursive code and has been used by Algol-like languages since the late 1950s.
(Following the same tradition, modern 64-bit x86 processors are able to run most programs written for older x86 CPUs, all the way back to the original 16-bit 8086 of 1978.) Over the years, successively newer implementations of the same architecture have become several hundreds of times faster than the original 80386 (and thousands of times faster than the 8086).
The Intel 386, originally released as 80386 and later renamed into i386, is a 32-bit microprocessor introduced in 1985.
A 33 MHz 80386 was reportedly measured to operate at about 11.4 MIPS. The 80386 was introduced in October 1985, while manufacturing of the chips in significant quantities commenced in June 1986.
A 33 MHz 80386 was reportedly measured to operate at about 11.4 MIPS. The 80386 was introduced in October 1985, while manufacturing of the chips in significant quantities commenced in June 1986.
A flat memory model is assumed, specifically, that the DS and ES segments address the same region of memory. ==Chip variants== ===80386SX=== In 1988, Intel introduced the 80386SX, most often referred to as the 386SX, a cut-down version of the 80386 with a 16-bit data bus mainly intended for lower-cost PCs aimed at the home, educational, and small-business markets, while the 386DX remained the high-end variant used in workstations, servers, and other demanding tasks.
Single-sourcing the 386 allowed Intel greater control over its development and substantially greater profits in later years. AMD introduced its compatible Am386 processor in March 1991 after overcoming legal obstacles, thus ending Intel's 4.7-year monopoly on 386-compatible processors.
From 1991 IBM also manufactured 386 chips under license for use only in IBM PCs and boards. ==Compatibles== The AMD Am386SX and Am386DX were almost exact clones of the i386SX and i386DX.
In the Windows NT family, Windows NT 3.51 was the last version with 386 support. Debian GNU/Linux removed 386 support with the release of 3.1 (Sarge) in 2005.
Citing the maintenance burden around SMP primitives, the Linux kernel developers cut support from the development codebase in December 2012, later released as kernel version 3.8. Among the BSDs, FreeBSD's 5.x releases were the last to support the 386; support for the 386SX was cut with release 5.2, while the remaining 386 support was removed with the 6.0 release in 2005.
The first personal computer to make use of the 80386 was designed and manufactured by Compaq and marked the first time a fundamental component in the IBM PC compatible de facto standard was updated by a company other than IBM. In May 2006, Intel announced that i386 production would stop at the end of September 2007.
The first personal computer to make use of the 80386 was designed and manufactured by Compaq and marked the first time a fundamental component in the IBM PC compatible de facto standard was updated by a company other than IBM. In May 2006, Intel announced that i386 production would stop at the end of September 2007.
Linux continued to support i386 processors until December 11, 2012; when the kernel cut 386-specific instructions in version 3.8. == Architecture == |} The processor was a significant evolution in the x86 architecture, and extended a long line of processors that stretched back to the Intel 8008.
Citing the maintenance burden around SMP primitives, the Linux kernel developers cut support from the development codebase in December 2012, later released as kernel version 3.8. Among the BSDs, FreeBSD's 5.x releases were the last to support the 386; support for the 386SX was cut with release 5.2, while the remaining 386 support was removed with the 6.0 release in 2005.
All text is taken from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License .
Page generated on 2021-08-05