Intel 80386 - Revision history

Jnc: Avoid redir

2025-04-17T12:12:43Z

Avoid redir

← Older revision		Revision as of 12:12, 17 April 2025
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	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 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 ==		== programming ==

Mharriger at 23:23, 29 December 2021

2021-12-29T23:23:32Z

← Older revision		Revision as of 23:23, 29 December 2021
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	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.		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.		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.

Jnc: Proper cat

2018-11-03T11:40:20Z

Proper cat

← Older revision		Revision as of 11:40, 3 November 2018
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	[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]		[[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.		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.
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	The most popular reference is the [[INTEL 80386 PROGRAMMER'S REFERENCE MANUAL]].		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 ==		== Trivia ==
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	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.		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]].		The next CPU in the line of [[Intel x86\|x86]] CPUs was the [[Intel 80486]].
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	{{semi-stub}}		{{semi-stub}}

	[[Category: Microprocessors]]		[[Category: Intel Microprocessors]]

Jnc: Proper cat, +links

2018-10-19T22:14:37Z

Proper cat, +links

← Older revision		Revision as of 22:14, 19 October 2018
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	[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]		[[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 ==		== programming ==
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	== 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 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 ==		== 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.
			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 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.		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]]

Jnc: typo

2017-10-31T12:23:58Z

typo

← Older revision		Revision as of 12:23, 31 October 2017
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	[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]		[[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.		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.

Jnc: Highlight title, add some links

2017-10-31T12:23:14Z

Highlight title, add some links

← Older revision		Revision as of 12:23, 31 October 2017
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	[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]		[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]
	The i386 is the 3rd generation CPU from Intel based on the 8088/8086 CPU. The 386 was a ~~32bit~~ CPU, featuring all the features of the [[~~i286~~]] CPU, plus ~~32bit~~ 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.		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 ~~32bit~~ 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 ==		== programming ==
Line 10:		Line 11:

	== 80386sx ==		== 80386sx ==
	The 80386sx was a low cost version of the 80386. Instead of having a ~~32bit~~ address bus, it was restricted to 24bits, meaning the 80386sx could only address 16MB of ram maximum. The 80386sx also only could transfer data ~~16bit~~ at a time, so reading a ~~32bit~~ 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 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 ==		== Trivia ==
	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.		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 ~~[[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~~.		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]].

			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 x86 CPUs was the [[i486]].~~
	{{stub}}		{{stub}}

	[[Category:Microprocessors]]		[[Category:Microprocessors]]

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

2017-10-31T12:15:09Z

Jnc moved page I386 to Intel 80386: Formal name

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

Tor: Add category:Microprocessors

2013-02-28T13:07:27Z

Add category:Microprocessors

← Older revision		Revision as of 13:07, 28 February 2013
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	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]]

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

2012-12-20T11:27:01Z

Fixed to -> too, and some other minor things

← Older revision		Revision as of 11:27, 20 December 2012
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	== Trivia ==		== 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}}		{{stub}}

Neozeed: added in birth/death dates.

2012-12-14T17:08:32Z

added in birth/death dates.

← Older revision		Revision as of 17:08, 14 December 2012
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	[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]		[[Image:80386-12 CPU.jpg\|150px\|thumb\|right\|An i386 cpu]]
	The i386 is the 3rd generation CPU from Intel based on the 8088/8086 CPU. The 386 was a 32bit CPU, featuring all the features of the [[i286]] CPU, plus 32bit 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 i386 is the 3rd generation CPU from Intel based on the 8088/8086 CPU. The 386 was a 32bit CPU, featuring all the features of the [[i286]] CPU, plus 32bit 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.		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.