Intel 80386 - Revision history

Jnc: Avoid redir

2025-04-17T12:12:43Z

Avoid redir

Mharriger at 23:23, 29 December 2021

2021-12-29T23:23:32Z

Jnc: Proper cat

2018-11-03T11:40:20Z

Proper cat

Jnc: Proper cat, +links

2018-10-19T22:14:37Z

Proper cat, +links

Jnc: typo

2017-10-31T12:23:58Z

typo

Jnc: Highlight title, add some links

2017-10-31T12:23:14Z

Highlight title, add some links

Jnc: Jnc moved page I386 to Intel 80386: Formal name

2017-10-31T12:15:09Z

Jnc moved page I386 to Intel 80386: Formal name

Tor: Add category:Microprocessors

2013-02-28T13:07:27Z

Add category:Microprocessors

Tor: Fixed to -> too, and some other minor things

2012-12-20T11:27:01Z

Fixed to -> too, and some other minor things

Neozeed: added in birth/death dates.

2012-12-14T17:08:32Z

added in birth/death dates.

@@ Line 5: / Line 5: @@
 The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all un-privileged instructions of the 386 could execute in a hardware [[virtual machine]], and privileged instructions would fault.
-The real success of this chip was that it made 32-bit software available to the masses, and for bringing 'real' [[Unix]] from the [[VAX]] environment to normal people, via cheap commodity hardware.
+The real success of this chip was that it made 32-bit software available to the masses, and for bringing 'real' [[UNIX|Unix]] from the [[VAX]] environment to normal people, via cheap commodity hardware.
 == programming ==

@@ Line 18: / Line 18: @@
 The first 386 CPUs had an issue with the multiply [[instruction]] in 32-bit modes, so there had to be a recall on all parts.  Later the parts were either stamped "16 bit software only" or with a double sigma sign to certify they would operate correctly.
-IBM was not the first PC manufacturer to make a 386 CPU, they were too infatuated with the 286 and the 16-bit version of [[OS/2]] so it was [[Compaq]] who beat them to the first 386-based machine, with the [[Desqpro 386]].
+IBM was not the first to manufacture a PC with the 386 CPU, they were too infatuated with the 286 and the 16-bit version of [[OS/2]] so it was [[Compaq]] who beat them to the first 386-based machine, with the [[Desqpro 386]].
 Since there was no 386-specific software at its launch, Compaq pushed [[Microsoft]] to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.

@@ Line 1: / Line 1: @@
 [[Image:80386-12 CPU.jpg|150px|thumb|right|An i386 cpu]]
-The '''Intel 80386''' (sometimes '''386''' or '''i386''' for short) is the 3rd generation [[microprocessor]] [[Central Processing Unit|CPU]] from [[Intel]] based on the 8088/8086 CPU.  The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit [[protected mode]] with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible ram could be accessed without [[segment]]ation. The 386 was introduced in 1985, and finally discontinued in 2007.
+The '''Intel 80386''' (sometimes '''386''' or '''i386''' for short) is the 4th generation [[microprocessor]] [[Central Processing Unit|CPU]] from [[Intel]] based on the 8088/8086 CPU. The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit [[protected mode]] with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible [[Random Access Memory|RAM]] could be accessed without [[segment]]ation. The 386 was introduced in 1985, and finally discontinued in 2007.
-The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all unprivileged instructions of the 386 could execute in a hardware [[virtual machine]], and privileged instructions would fault.
+The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all un-privileged instructions of the 386 could execute in a hardware [[virtual machine]], and privileged instructions would fault.
 The real success of this chip was that it made 32-bit software available to the masses, and for bringing 'real' [[Unix]] from the [[VAX]] environment to normal people, via cheap commodity hardware.
@@ Line 10: / Line 10: @@
 The most popular reference is the [[INTEL 80386 PROGRAMMER'S REFERENCE MANUAL]].
-== 80386sx ==
+== 80386SX ==
-The 80386sx was a low cost version of the 80386.  Instead of having a 32-bit [[address bus]], it was restricted to 24bits, meaning the 80386sx could only address 16MB of ram maximum. The 80386sx also only could transfer data 16 bits at a time, so reading a 32-bit word took two reads. This basically kept the 80386sx comparable in speed to the 80286. The internal registers were still 32bit wide, so it could run the same software.
+The 80386SX was a low cost version of the 386. Instead of having a 32-bit [[address bus]], it was restricted to 24 bits, meaning the 386SX could only address 16MB of RAM maximum. The 386SX also only could transfer data 16 bits at a time, so reading a 32-bit word took two reads. This basically kept the 386SX comparable in speed to the 286. The internal [[register]]s were still 32bit wide, so it could run the same software.
 == Trivia ==
@@ Line 18: / Line 18: @@
 The first 386 CPUs had an issue with the multiply [[instruction]] in 32-bit modes, so there had to be a recall on all parts.  Later the parts were either stamped "16 bit software only" or with a double sigma sign to certify they would operate correctly.
-IBM was not the first PC manufacturer to make a 386 CPU, they were too infatuated with the 80286 and the 16bit version of [[OS/2]] so it was [[Compaq]] who beat them to the first 80386-based machine, with the [[Desqpro 386]].
+IBM was not the first PC manufacturer to make a 386 CPU, they were too infatuated with the 286 and the 16-bit version of [[OS/2]] so it was [[Compaq]] who beat them to the first 386-based machine, with the [[Desqpro 386]].
-Since there was no 80386-specific software at its launch, Compaq pushed [[Microsoft]] to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.
+Since there was no 386-specific software at its launch, Compaq pushed [[Microsoft]] to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.
 The next CPU in the line of [[Intel x86|x86]] CPUs was the [[Intel 80486]].
@@ Line 26: / Line 26: @@
 {{semi-stub}}
-[[Category: Microprocessors]]
+[[Category: Intel Microprocessors]]

@@ Line 1: / Line 1: @@
 [[Image:80386-12 CPU.jpg|150px|thumb|right|An i386 cpu]]
-The '''Intel 80386''' (sometimes '''386''' or '''i386''' for short) is the 3rd generation [[Central Processing Unit|CPU]] from Intel based on the 8088/8086 CPU.  The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit protected mode with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible ram could be accessed without segmentation.  The 386 was introduced in 1985, and finally discontinued in 2007.
+The '''Intel 80386''' (sometimes '''386''' or '''i386''' for short) is the 3rd generation [[microprocessor]] [[Central Processing Unit|CPU]] from [[Intel]] based on the 8088/8086 CPU.  The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit [[protected mode]] with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible ram could be accessed without [[segment]]ation. The 386 was introduced in 1985, and finally discontinued in 2007.
-The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all unprivileged instructions of the 386 could execute in a hardware virtual machine, and privileged instructions would fault.
+The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all unprivileged instructions of the 386 could execute in a hardware [[virtual machine]], and privileged instructions would fault.
-The real success of this chip was that it made 32-bit software available to the masses, and for bringing 'real' [[Unix]] from the VAX environment to normal people, via cheap commodity hardware.
+The real success of this chip was that it made 32-bit software available to the masses, and for bringing 'real' [[Unix]] from the [[VAX]] environment to normal people, via cheap commodity hardware.
 == programming ==
@@ Line 11: / Line 11: @@
 == 80386sx ==
-The 80386sx was a low cost version of the 80386.  Instead of having a 32-bit address bus, it was restricted to 24bits, meaning the 80386sx could only address 16MB of ram maximum.  The 80386sx also only could transfer data 16 bits at a time, so reading a 32-bit word took two reads.  This basically kept the 80386sx comparable in speed to the 80286.  The internal registers were still 32bit wide, so it could run the same software.
 == Trivia ==
 The first 386 CPUs had an issue with the multiply instruction in 32-bit modes, so there had to be a recall on all parts.  Later the parts were either stamped "16 bit software only" or with a double sigma sign to certify they would operate correctly.
 IBM was not the first PC manufacturer to make a 386 CPU, they were too infatuated with the 80286 and the 16bit version of [[OS/2]] so it was [[Compaq]] who beat them to the first 80386-based machine, with the [[Desqpro 386]].
@@ Line 20: / Line 22: @@
 Since there was no 80386-specific software at its launch, Compaq pushed [[Microsoft]] to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.
-The next CPU in the line of x86 CPUs was the [[Intel 80486]].
+The next CPU in the line of [[Intel x86|x86]] CPUs was the [[Intel 80486]].
-{{stub}}
+{{semi-stub}}
-[[Category:Microprocessors]]
+[[Category: Microprocessors]]

@@ Line 1: / Line 1: @@
 [[Image:80386-12 CPU.jpg|150px|thumb|right|An i386 cpu]]
-The '''Intel 80386''' (sometimes '''386'' or '''i386''' for short) is the 3rd generation [[Central Processing Unit|CPU]] from Intel based on the 8088/8086 CPU.  The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit protected mode with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible ram could be accessed without segmentation.  The 386 was introduced in 1985, and finally discontinued in 2007.
+The '''Intel 80386''' (sometimes '''386''' or '''i386''' for short) is the 3rd generation [[Central Processing Unit|CPU]] from Intel based on the 8088/8086 CPU.  The 386 was a 32-bit CPU, featuring all the features of the [[Intel 80286]] CPU, plus 32-bit protected mode with variable page sizes, allowing for a flat memory space where the entire 4GB of accessible ram could be accessed without segmentation.  The 386 was introduced in 1985, and finally discontinued in 2007.
 The 386 also featured a special mode called v86 which facilitated the creation of [[VDM]]s.  In this mode all unprivileged instructions of the 386 could execute in a hardware virtual machine, and privileged instructions would fault.

← Older revision	Revision as of 12:15, 31 October 2017
(No difference)

← Older revision		Revision as of 13:07, 28 February 2013
Line 20:		Line 20:
	The next CPU in the line of x86 CPUs was the [[i486]].		The next CPU in the line of x86 CPUs was the [[i486]].
	{{stub}}		{{stub}}
		+	[[Category:Microprocessors]]

@@ Line 13: / Line 13: @@
 == Trivia ==
-The first 386's had an issue with the multiply instruction in 32bit modes, so there had to be a recall on all parts.  Later the parts were either stamped "16 bit software only" or with a double sigma sign to certify they would operate correctly.
+The first 386 CPUs had an issue with the multiply instruction in 32bit modes, so there had to be a recall on all parts.  Later the parts were either stamped "16 bit software only" or with a double sigma sign to certify they would operate correctly.
-IBM was not the first PC manufacture to make a 386 CPU, they were to infatuated with the [[i286]] and the 16bit version of [[OS/2]] so it was [[Compaq]] who beat them with a Desqpro 386.  Since there was no 386 specific software at it's launch Compaq pushed Microsoft to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.
+IBM was not the first PC manufacturer to make a 386 CPU, they were too infatuated with the [[i286]] and the 16bit version of [[OS/2]] so it was [[Compaq]] who beat them with a Desqpro 386.  Since there was no 386 specific software at its launch Compaq pushed Microsoft to release [[Windows/386]] before Windows 2.0 so that there would be some compelling reason to buy a Compaq 386.
-The next cpu in the line of x86 cpus was the [[i486]].
+The next CPU in the line of x86 CPUs was the [[i486]].
 {{stub}}