Intel 80286 - Revision history

Jnc: Proper cat

2018-11-03T11:35:31Z

Proper cat

← Older revision		Revision as of 11:35, 3 November 2018
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	[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]		[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]

	The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the [[Central Processing Unit\|CPU]]) was the ~~second~~ generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.		The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the [[Central Processing Unit\|CPU]]) was the third generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB. There ~~was~~ however two major flaws with the 286		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a [[virtual address\|virtual]] [[address space]] of 1GB. There were, however, two major flaws with the 286

	The first was that all the memory was (still) divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & [[software port\|porting]] of large programs.		The first was that all the memory was (still) divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & [[software port\|porting]] of large programs.

	The second was that the 286 had no method of switching the CPU from protected mode to [[real mode]]. It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, ~~however~~ it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.		The second was that the 286 had no method of switching the CPU from protected mode to [[real mode]]. It was Gordon Letwin of Microsoft who found a way, using a [[triple fault]] to soft reset the 286 into real mode; however, it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.

	The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.		The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.

	In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of ~~[[ram]]~~, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.		In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of RAM, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.

	==See also==		==See also==
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	{{semi-stub}}		{{semi-stub}}

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

Jnc: Avoid dab page

2018-10-22T19:40:44Z

Avoid dab page

← Older revision		Revision as of 19:40, 22 October 2018
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	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB. There was however two major flaws with the 286		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB. There was however two major flaws with the 286

	The first was that all the memory was (still) divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & [[port]]~~ing~~ of large programs.		The first was that all the memory was (still) divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & [[software port\|porting]] of large programs.

	The second was that the 286 had no method of switching the CPU from protected mode to [[real mode]]. It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.		The second was that the 286 had no method of switching the CPU from protected mode to [[real mode]]. It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.

Jnc: copyedit

2018-10-22T18:11:48Z

copyedit

← Older revision		Revision as of 18:11, 22 October 2018
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	The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the [[Central Processing Unit\|CPU]]) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.		The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the [[Central Processing Unit\|CPU]]) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB. There was however two major flaws with the 286

	~~There was however two major flaws with the 286.~~ The first ~~being~~ that all the memory was divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & ~~porting~~ of large programs. ~~Also~~ the 286 had no method of switching the CPU from protected mode to [[real mode]].		The first was that all the memory was (still) divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & [[port]]ing of large programs.

	It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.		The second was that the 286 had no method of switching the CPU from protected mode to [[real mode]]. It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.

	The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.		The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.

	In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.		In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of [[ram]], and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.

	==See also==		==See also==

Jnc: Proper cat, +links

2018-10-19T22:10:13Z

Proper cat, +links

← Older revision		Revision as of 22:10, 19 October 2018
Line 1:		Line 1:
	[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]		[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]

	The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the CPU) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.		The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the [[Central Processing Unit\|CPU]]) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow ~~acces~~ for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit [[address bus]] to allow access for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.

	There was however two major flaws with the 286. The first being that all the memory was divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & porting of large programs. Also the 286 had no method of switching the CPU from protected mode to real mode.		There was however two major flaws with the 286. The first being that all the memory was divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & porting of large programs. Also the 286 had no method of switching the CPU from protected mode to [[real mode]].

	It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.		It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.
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	* [[Intel x86]]		* [[Intel x86]]

	{{stub}}		{{semi-stub}}

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

Jnc: Clarify naming

2018-01-16T20:27:44Z

Clarify naming

← Older revision		Revision as of 20:27, 16 January 2018
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	[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]		[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]

	The '''Intel 80286''' (often given as '''i286''' or '''iAPX286''', although ~~from the Intel documentation~~ it is not clear if the latter term refers to complete systems, or just the CPU) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.		The '''Intel 80286''' (often given as '''286''' or '''i286'''; Intel documentation often refers to the '''iAPX286''', although it is not clear if the latter term refers to complete systems, or just the CPU) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow acces for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow acces for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.
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	In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.		In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.

			==See also==

			* [[Intel x86]]

	{{stub}}		{{stub}}

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

Jnc: Consistem naming

2018-01-16T20:26:04Z

Consistem naming

← Older revision		Revision as of 20:26, 16 January 2018
Line 1:		Line 1:
	[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]		[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]

	The '''Intel ~~iAPX286~~''' (often given as '''~~80286~~''' or '''~~i286~~''' or ~~some variant~~) was the second generation 8088/[[~~i8086~~\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.		The '''Intel 80286''' (often given as '''i286''' or '''iAPX286''', although from the Intel documentation it is not clear if the latter term refers to complete systems, or just the CPU) was the second generation 8088/[[Intel 8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow acces for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow acces for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.

	There was however two major flaws with the 286. The first being that all the memory was divided in 64KB ~~segments~~. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & porting of large programs. Also the 286 had no method of switching the CPU from protected mode to real mode.		There was however two major flaws with the 286. The first being that all the memory was divided in 64KB [[segment]]s. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & porting of large programs. Also the 286 had no method of switching the CPU from protected mode to real mode.

	It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.		It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.

	The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.		The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.

	In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never ~~hard~~ more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.		In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never had more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.

	{{stub}}		{{stub}}

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

Jnc: Jnc moved page Intel iAPX 286 to Intel 80286 over redirect: Standardize namng

2018-01-16T20:22:51Z

Jnc moved page Intel iAPX 286 to Intel 80286 over redirect: Standardize namng

← Older revision		Revision as of 20:22, 16 January 2018
(No difference)

Jnc: Give formal name, add some links

2017-10-31T12:34:46Z

Give formal name, add some links

← Older revision		Revision as of 12:34, 31 October 2017
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	[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]		[[Image:I80286.jpg\|thumb\|right\|150px\|i80286]]
	~~The i286 was the second generation 8088/[[i8086\|8086]] cpu. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.~~

	The ~~286 also introduced~~ [[~~protected mode~~]]. ~~In this mode~~, it ~~had a 24bit address bus to allow acces for up to 16MB of ram, and a virtual address space of 1GB~~.		The '''Intel iAPX286''' (often given as '''80286''' or '''i286''' or some variant) was the second generation 8088/[[i8086\|8086]] [[Central Processing Unit\|CPU]]. The 286 was noted for being more efficent then the prior parts, so at the same clock speed it was slightly faster.

	~~There was however two major flaws with the~~ 286 ~~cpu~~. ~~The first being that all the memory was divided in 64kb segments. With the ever growing popularity~~ of ~~the~~ [[~~m68k~~]] ~~cpu's with flat~~ address space ~~this was a major problem as it hampered the design & porting~~ of ~~large programs. Also the 286 had no method of switching the CPU from protected mode to real mode~~.		The 286 also introduced [[protected mode]]. In this mode, it had a 24-bit address bus to allow acces for up to 16MB of [[Random Access Memory\|RAM]], and a virtual [[address space]] of 1GB.

	It was ~~Gordon Letwin of Microsoft~~ that ~~found a way using a 'tripple fault' to soft reset~~ the ~~286 into real mode, however it could take nearly 1 second, making switching from protected to real not fesable to be done often~~. ~~However this is what made~~ [[~~OS/2~~]] ~~fesable~~ as ~~now~~ it ~~could offer limited MS-DOS compatibility~~.		There was however two major flaws with the 286. The first being that all the memory was divided in 64KB segments. With the ever growing popularity of the [[Motorola MC68000\|Motorola 68K]] CPU's flat address space, this was a major problem, as it hampered the design & porting of large programs. Also the 286 had no method of switching the CPU from protected mode to real mode.

	~~The 286~~ was ~~seen by~~ the ~~software business as being a rather disapointing CPU~~. ~~Intel listened, and~~ it~~'s next chip the~~ [[~~i386~~]] ~~corrected all the issues people had with the 286~~.		It was Gordon Letwin of Microsoft who found a way using a [[triple fault]] to soft reset the 286 into real mode, however it could take nearly 1 second, making switching from protected to real not feasible to be done often. However this is what made [[OS/2]] feasible as now it could offer limited [[MS-DOS]] compatibility.

	In my opinion the ~~i80286 cpu~~ held the industry back some 10 years, as most people that owned 286 ~~cpu~~'s never hard more then 1MB or ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.		The 286 was seen by the software business as being a rather disapointing CPU. Intel listened, and its next chip, the [[Intel 80386\|386]], corrected all the issues people had with the 286.

			In my opinion the 80286 CPU held the industry back some 10 years, as most people that owned 286 CPU's never hard more then 1MB of ram, and this led to so many things at the time trying to cater to the 286 protected mode, instead of taking advantage of the 386.

	{{stub}}		{{stub}}

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

Jnc: Jnc moved page I286 to Intel iAPX 286: Formal name

2017-10-31T12:26:28Z

Jnc moved page I286 to Intel iAPX 286: Formal name

← Older revision		Revision as of 12:26, 31 October 2017
(No difference)

Tor: Add category:Microprocessors

2013-02-28T13:06:35Z

Add category:Microprocessors

← Older revision		Revision as of 13:06, 28 February 2013
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	{{stub}}		{{stub}}
			[[Category:Microprocessors]]