IBM AT - Revision history

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2018-10-19T22:41:00Z

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	[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]		[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]

	The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16-bit [[data bus]], 24-bit [[address bus]], and 16-bit [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of [[operating system]]s, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special [[protected mode]] version of Xenix.		The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16-bit [[data bus]], 24-bit [[address bus]], and 16-bit ISA expansion bus. IBM had also promised along with the AT that it would support the next generation of [[operating system]]s, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special [[protected mode]] version of Xenix.

	All [[BIOS]]'s with computers with a 286 or greater CPU are compatible with the IBM AT.		All [[BIOS]]'s with computers with a 286 or greater CPU are compatible with the IBM AT.

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2018-10-19T22:34:01Z

Avoid dab page

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	The '''IBM AT''', also known as the '''IBM 5170''' was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] [[CPU]]. The ~~16bit~~ ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran its ISA bus at 6MHz, vs the PC/XT's 4.77MHz making the AT all around faster.		The '''IBM AT''', also known as the '''IBM 5170''' was the machine that introduced 16-[[bit]] [[Industry Standard Architecture\|ISA]] slots, and the 'advanced' [[i286]] [[Central Processing Unit\|CPU]].

			The 16-bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran its ISA bus at 6MHz, vs the PC/XT's 4.77MHz making the AT all around faster.

	Until the rise of the [[Pentium II]] CPU, the IBM AT [[motherboard]] was the standard size for clone motherboards with 286 and greater CPUs.		Until the rise of the [[Pentium II]] CPU, the IBM AT [[motherboard]] was the standard size for clone motherboards with 286 and greater CPUs.
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	[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]		[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]

	The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a ~~16bit~~ [[~~memory~~ bus]], ~~24bit~~ [[address bus]], and ~~16bit~~ [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of [[operating system]]s, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special [[protected mode]] version of Xenix.		The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16-bit [[data bus]], 24-bit [[address bus]], and 16-bit [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of [[operating system]]s, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special [[protected mode]] version of Xenix.

	All [[BIOS]]'s with computers with a 286 or greater CPU are compatible with the IBM AT.		All [[BIOS]]'s with computers with a 286 or greater CPU are compatible with the IBM AT.

Jnc: Jnc moved page IBM 5170 to IBM AT over redirect: Better known this way

2018-10-19T11:45:37Z

Jnc moved page IBM 5170 to IBM AT over redirect: Better known this way

← Older revision		Revision as of 11:45, 19 October 2018
(No difference)

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2018-10-19T11:42:42Z

Update cat

← Older revision		Revision as of 11:42, 19 October 2018
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	The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU. The 16bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran its ISA bus at 6MHz, vs the PC/XT's 4.77MHz making the AT all around faster.		The '''IBM AT''', also known as the '''IBM 5170''' was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] [[CPU]]. The 16bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran its ISA bus at 6MHz, vs the PC/XT's 4.77MHz making the AT all around faster.

			Until the rise of the [[Pentium II]] CPU, the IBM AT [[motherboard]] was the standard size for clone motherboards with 286 and greater CPUs.

	~~Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.~~
	[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]		[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]

	The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16bit memory bus, 24bit address bus, and 16bit [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of operating ~~systems~~, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special protected mode version of Xenix.		The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16bit [[memory bus]], 24bit [[address bus]], and 16bit [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of [[operating system]]s, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special [[protected mode]] version of Xenix.

	All BIOS's with computers with a 286 or greater CPU are compatible with the IBM AT.		All [[BIOS]]'s with computers with a 286 or greater CPU are compatible with the IBM AT.

	The IBM AT shipped with a WD-1002 controller, that supported MFM hard ~~disks~~, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile RAM. The AT also required a special diskette to set up the NVRAM, while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.		The IBM AT shipped with a WD-1002 [[controller]], that supported MFM hard [[disk]]s, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile RAM. The AT also required a special diskette to set up the [[NVRAM]], while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.

	Also in this model, was the introduction of high density ~~diskettes~~, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.		Also in this model, was the introduction of high density [[diskette]]s, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the [[compiler]] was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a [[ROM]] update, or a 3rd party controller, or both.

	The IBM AT was later supplanted by the [[IBM PS/2]] line of computers.		The IBM AT was later supplanted by the [[IBM PS/2]] line of computers.

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

	[[Category:IBM PCs]]		[[Category:IBM PCs]]

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	Also in this model, was the introduction of high density diskettes, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.		Also in this model, was the introduction of high density diskettes, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.

	The IBM AT was later supplanted by the [[PS/2]] line of computers.		The IBM AT was later supplanted by the [[IBM PS/2]] line of computers.

	{{stub}}		{{stub}}

	[[Category:IBM PCs]]		[[Category:IBM PCs]]

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	The IBM AT was later supplanted by the [[PS/2]] line of computers.		The IBM AT was later supplanted by the [[PS/2]] line of computers.

	{{stub}}		{{stub}}

			[[Category:IBM PCs]]

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2013-02-25T14:45:28Z

Mhz->MHz and other minor fixes

← Older revision		Revision as of 14:45, 25 February 2013
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	}}		}}

	The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU. The 16bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran ~~it's~~ ISA bus at ~~6Mhz~~, vs the PC/XT's 4.~~77Mhz~~ making the AT all around faster.		The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU. The 16bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran its ISA bus at 6MHz, vs the PC/XT's 4.77MHz making the AT all around faster.

	Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.		Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.
	[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]		[[Image:IBM 5170 motherboard.jpg\|thumb\|right\|250px\|IBM AT Motherboard]]

	The IBM AT unlike the [[IBM XT]]~~, the AT~~ is fully 16 bit, with a 16bit memory bus, 24 address bus, and 16bit [[ISA]] expansion bus. IBM had also promised along with the AT, that it would support the next generation of operating systems, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special protected mode version of Xenix.		The IBM AT unlike the [[IBM XT]] is fully 16 bit, with a 16bit memory bus, 24bit address bus, and 16bit [[ISA]] expansion bus. IBM had also promised along with the AT that it would support the next generation of operating systems, [[OS/2]]. The AT was also able to run [[Xenix]], along with a special protected mode version of Xenix.

	All BIOS's with computers with a 286 or greater CPU are compatible with the IBM AT.		All BIOS's with computers with a 286 or greater CPU are compatible with the IBM AT.

	The IBM AT shipped with a WD-1002 controller, that supported MFM hard disks, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile ~~ram~~. The AT also required a special diskette to ~~setup~~ the NVRAM, while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.		The IBM AT shipped with a WD-1002 controller, that supported MFM hard disks, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile RAM. The AT also required a special diskette to set up the NVRAM, while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.

	Also in this model, was the introduction of high density diskettes, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.		Also in this model, was the introduction of high density diskettes, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.

Neozeed at 15:57, 14 April 2011

2011-04-14T15:57:29Z

← Older revision		Revision as of 15:57, 14 April 2011
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	}}		}}

	The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU.		The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU. The 16bit ISA slots added an additional plug on the board for the extra address pins & IRQ pins, while keeping the existing 8 bit ISA slot in place. Thus the AT could use 8bit cards without modification. The AT also ran it's ISA bus at 6Mhz, vs the PC/XT's 4.77Mhz making the AT all around faster.

	Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.		Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.

Neozeed at 20:22, 31 January 2011

2011-01-31T20:22:41Z

← Older revision		Revision as of 20:22, 31 January 2011
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	}}		}}

	The IBM AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU.		The [[IBM]] AT, also known as the IBM 5170 was the machine that introduced 16 bit ISA slots, and the 'advanced' [[i286]] CPU.

	Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.		Until the rise of the Pentium II CPU, the IBM AT motherboard was the standard size for clone motherboards with 286 and greater CPUs.

Neozeed at 16:56, 7 August 2010

2010-08-07T16:56:45Z

← Older revision		Revision as of 16:56, 7 August 2010
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	The IBM AT shipped with a WD-1002 controller, that supported MFM hard disks, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile ram. The AT also required a special diskette to setup the NVRAM, while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.		The IBM AT shipped with a WD-1002 controller, that supported MFM hard disks, but unlike other controllers, the control code was in the IBM AT, and the drive parameter table was burned into the BIOS, and the selection was saved into the non volatile ram. The AT also required a special diskette to setup the NVRAM, while clones typically didn't include the ROM BASIC, and instead included a setup & diagnostic program in ROM.

			Also in this model, was the introduction of high density diskettes, starting with the 5 1/4" 1.2MB drive. Many AT specific things shipped on high density disks to prevent PC/XT users from using these programs. OS/2 was one such program, along with Microsoft C 5.1 where the OS/2 components were on high density disks, while the rest of the compiler was on low density disks. I don't remember exactly how you got a 3 1/2" disk on an original AT, if it required a ROM update, or a 3rd party controller, or both.

	The IBM AT was later supplanted by the [[PS/2]] line of computers.		The IBM AT was later supplanted by the [[PS/2]] line of computers.
	{{stub}}		{{stub}}