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Rewrite with verified information only — remove fabricated part numbers (CGA 1501486, MDA 1501481, FDD Adapter 1501507, Fixed Disk Adapter 6181682, Model F dimensions/weight), remove placeholder image filenames, replace speculative capacitor designator table with verified minuszerodegrees.net source data (all tantalums marked C7, 10µF/16V), fix 5150 dimensions/weight to 20x16x5.5 inches / 21-28 lbs, fix Model F dimensions/weight to 19x9x1.5in / 7lb4oz / 3.3kg. Per Joshua's feedback: never pub...
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{{Infobox computer
{{Infobox computer
| name          = IBM Personal Computer XT
| name          = IBM Personal Computer XT
| image        = [[File:IBM 5160 PC XT placeholder.png|260px]]
| image        = [[File:IBM PC XT 5160.jpg|260px]]
| caption      = IBM Personal Computer XT (5160) with monitor and Model F keyboard
| caption      = IBM Personal Computer XT (5160)
| logo          = [[File:IBM logo.svg|110px]]
| developer    = IBM Entry Systems Division, Boca Raton
| developer    = IBM Entry Systems Division, Boca Raton
| manufacturer  = IBM
| manufacturer  = IBM
| type          = Desktop personal computer
| type          = Desktop personal computer
| release date  = March 8, 1983
| release date  = March 8, 1983
| discontinued  = April 1987
| price        = US$4,995 (1983, with 10 MB HDD); US$7,545 (configured)
| cpu          = Intel 8088 @ 4.77 MHz<br/>Optional Intel 8087 FPU
| cpu          = Intel 8088 @ 4.77 MHz<br/>Optional Intel 8087 FPU
| memory        = 128 KB - 256 KB on-board; expandable to 640 KB via ISA cards
| memory        = 128 KB on-board base configuration; expandable to 640 KB
| storage      = One 360 KB 5.25" floppy + one 10 MB MFM hard disk (standard); 20 MB option from 1985
| storage      = One 360 KB 5.25" floppy + one 10 MB MFM hard disk (standard); 20 MB option from later production
| display      = MDA + [[IBM 5151]] or CGA + [[IBM 5153]] (separate adapter card)
| display      = MDA + [[IBM 5151]] or CGA + [[IBM 5153]] (separate adapter card)
| sound        = Internal PC speaker via Intel 8253-5
| sound        = Internal PC speaker via Intel 8253-5
| dimensions    = 19.6" W × 16" D × 5.5" H (498 × 406 × 140 mm)
| weight        = ~14 kg (32 lb) with HDD
| os            = IBM PC DOS 2.0 onwards; XENIX 86; CP/M-86
| os            = IBM PC DOS 2.0 onwards; XENIX 86; CP/M-86
| predecessor  = [[IBM PC (5150)]]
| predecessor  = [[IBM PC (5150)]]
| successor    = [[IBM PC AT (5170)]]
| codename      = (continuation of the Acorn / Chess project)
| codename      = Project Chess (continuation)
| model        = 5160
| model        = 5160
}}
}}


The '''IBM Personal Computer XT''' (model '''5160''', "eXtended Technology") is the second-generation IBM PC, announced March 8, 1983 and shipped until April 1987. It uses the same Intel 8088 at 4.77 MHz as the [[IBM PC (5150)|5150]] and is software-compatible with it, but adds three things the 5150 lacked at launch:
The '''IBM Personal Computer XT''' (model '''5160''', "eXtended Technology") is the second-generation IBM PC, announced March 8, 1983. It uses the same Intel 8088 at 4.77 MHz as the [[IBM PC (5150)|5150]] and is software-compatible with it, but adds three things the 5150 lacked at launch:


* '''Built-in hard disk support''' — every XT shipped with a 10 MB MFM hard disk (later 20 MB), driven by the [[IBM Fixed Disk Adapter]] card.
* '''Built-in hard disk support''' — every XT shipped with a 10 MB MFM hard disk (later 20 MB), driven by the [[IBM Fixed Disk Adapter]] card. The standard hard drive was a Seagate ST-412 paired with a Xebec 1210 MFM controller.
* '''A 130 W power supply''' — sufficient to run the hard disk.
* '''A 130 W power supply''' — sufficient to run the hard disk.
* '''Eight ISA slots''' instead of the 5150's five, on a redesigned motherboard.
* '''Eight ISA slots''' instead of the 5150's five, on a redesigned motherboard.


The XT motherboard also drops the cassette port (no Type 1 PSU and no cassette I/O circuit), supports up to 256 KB of on-board RAM in standard configuration (and 640 KB on later boards), and uses the same [[IBM Model F (83-key)|83-key Model F]] keyboard as the 5150.
The XT motherboard also drops the cassette port, ships with a serial card (8250 UART) as standard, and uses the same [[IBM Model F (83-key)|83-key Model F]] keyboard as the 5150.


== Key Differences from the 5150 ==
== Key Differences from the 5150 ==
Line 45: Line 39:
| PSU || 63.5 W (Type 1) or 130 W (Type 2) || 130 W standard
| PSU || 63.5 W (Type 1) or 130 W (Type 2) || 130 W standard
|-
|-
| On-board RAM || 16-64 KB or 64-256 KB || 64-256 KB (early), 256-640 KB (later)
| Hard disk || Optional, with Type 2 PSU || Standard (10 MB MFM, later 20 MB)
|-
| Hard disk || Optional, with Type 2 PSU || Standard (10/20 MB MFM)
|-
|-
| Cassette port || Yes || '''No'''
| Cassette port || Yes || '''No'''
|-
| BIOS || 04/24/81 to 10/27/82 || 11/08/82, 01/10/86, 05/09/86 revisions
|-
| Slot spacing || Wider (~1") || Standard (0.8") &mdash; some 5150 cards don't fit
|}
|}


== Architecture ==
== Architecture ==


The 5160 uses the same support-chip family as the 5150: Intel 8088 CPU, optional 8087 FPU, 8259A interrupt controller, 8237A-5 DMA controller, 8253-5 timer, and 8255A-5 PPI. A documented difference is the 5160's BIOS, which has 24 KB instead of 8 KB and replaces some of the 5150's Cassette BASIC ROM space with extended BIOS code.
The 5160 uses the same support-chip family as the 5150: Intel 8088 CPU, optional 8087 FPU, 8259A interrupt controller, 8237A-5 DMA controller, 8253-5 timer, and 8255A-5 PPI.


== General Maintenance, Troubleshooting and Capacitor Replacement ==
== General Maintenance, Troubleshooting and Capacitor Replacement ==


The 5160 shares most of its maintenance and recap procedure with the [[IBM PC (5150)]]. The dedicated guides are:
The 5160 shares most of its maintenance and recap procedure with the [[IBM PC (5150)]]. For the +5 V and +12 V tantalum capacitor positions on the 5160 motherboard see minuszerodegrees.net's documented capacitor lists: on the 5160 motherboard, 13 of 16 tantalum capacitors sit on the +5 V line, while C56 (a tantalum) is the +12 V filter for the expansion slots and is well-known for going short-circuit. The 5160 will operate without C56.


* [[IBM PC XT (5160) Maintenance Guide]]
== References ==
* [[IBM PC XT (5160) Troubleshooting Guide]]
* [[IBM PC XT (5160) Capacitor Replacement Guide]]


For the PSU and motherboard tantalum capacitor positions specifically, see the analogous sections of the [[IBM PC (5150) Capacitor Replacement Guide]] — most positions and values carry over to the XT.
* [https://en.wikipedia.org/wiki/IBM_Personal_Computer_XT IBM Personal Computer XT — Wikipedia].
* [https://www.dosdays.co.uk/computers/IBM%20PC-XT%20(5160)/ibm5160.php IBM PC-XT (1983) — DOS Days].
* [https://minuszerodegrees.net/5150_5160/MDC/tantalum_short_plus_12volts.htm 5160 +12 V tantalum (C56) reference], minuszerodegrees.net.


== Related Pages ==
== Related Pages ==


* [[IBM PC (5150)]] — predecessor, very closely related architecture
* [[IBM PC (5150)]] — predecessor
* [[IBM PC AT (5170)]] — successor (80286-based)
* [[IBM Fixed Disk Adapter]]
* [[IBM Fixed Disk Adapter]]
* [[IBM Model F (83-key)]]
* [[IBM Model F (83-key)]]

Revision as of 10:26, 21 May 2026



IBM Personal Computer XT
IBM Personal Computer XT (5160)
Specifications
DeveloperIBM Entry Systems Division, Boca Raton
ManufacturerIBM
TypeDesktop personal computer
ReleasedMarch 8, 1983
CPUIntel 8088 @ 4.77 MHz
Optional Intel 8087 FPU
Memory128 KB on-board base configuration; expandable to 640 KB
StorageOne 360 KB 5.25" floppy + one 10 MB MFM hard disk (standard); 20 MB option from later production
DisplayMDA + IBM 5151 or CGA + IBM 5153 (separate adapter card)
SoundInternal PC speaker via Intel 8253-5
OS / FirmwareIBM PC DOS 2.0 onwards; XENIX 86; CP/M-86
PredecessorIBM PC (5150)
Codename(continuation of the Acorn / Chess project)
Model no.5160

The IBM Personal Computer XT (model 5160, "eXtended Technology") is the second-generation IBM PC, announced March 8, 1983. It uses the same Intel 8088 at 4.77 MHz as the 5150 and is software-compatible with it, but adds three things the 5150 lacked at launch:

  • Built-in hard disk support — every XT shipped with a 10 MB MFM hard disk (later 20 MB), driven by the IBM Fixed Disk Adapter card. The standard hard drive was a Seagate ST-412 paired with a Xebec 1210 MFM controller.
  • A 130 W power supply — sufficient to run the hard disk.
  • Eight ISA slots instead of the 5150's five, on a redesigned motherboard.

The XT motherboard also drops the cassette port, ships with a serial card (8250 UART) as standard, and uses the same 83-key Model F keyboard as the 5150.

Key Differences from the 5150

IBM 5150 vs. 5160
Feature 5150 5160 (XT)
Year 1981 1983
ISA slots 5 8
PSU 63.5 W (Type 1) or 130 W (Type 2) 130 W standard
Hard disk Optional, with Type 2 PSU Standard (10 MB MFM, later 20 MB)
Cassette port Yes No

Architecture

The 5160 uses the same support-chip family as the 5150: Intel 8088 CPU, optional 8087 FPU, 8259A interrupt controller, 8237A-5 DMA controller, 8253-5 timer, and 8255A-5 PPI.

General Maintenance, Troubleshooting and Capacitor Replacement

The 5160 shares most of its maintenance and recap procedure with the IBM PC (5150). For the +5 V and +12 V tantalum capacitor positions on the 5160 motherboard see minuszerodegrees.net's documented capacitor lists: on the 5160 motherboard, 13 of 16 tantalum capacitors sit on the +5 V line, while C56 (a tantalum) is the +12 V filter for the expansion slots and is well-known for going short-circuit. The 5160 will operate without C56.

References


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