IBM PS/2 Model 80
| Company type | Product model |
|---|---|
| Industry | Computer hardware |
| Founded | July 1987 |
| Founder | International Business Machines Corporation (IBM) |
| Defunct | 1992 |
| Fate | Discontinued and replaced by PS/2 Server 85 |
| Headquarters | Boca Raton, Florida; later Raleigh, North Carolina , United States |
Area served | Worldwide |
Key people | Mark Dean (chief engineer) |
| Products | Desktop personal computer |
| Parent | IBM |
The Personal System/2 Model 80 (badged as Personal System/2 Model 80 386) represents a premium desktop within IBM's IBM PS/2 series. Launched in July 1987, it is powered by a 32-bit i386 CPU running at 16 MHz and housed in a tower chassis shared with the 16-bit IBM PS/2 Model 60. This model stands out as the only PS/2 at release to incorporate multiple 32-bit Micro Channel architecture (MCA) expansion slots, alongside five to six bays for drives. Positioned as the flagship of the initial lineup, it marked IBM’s inaugural personal computer utilizing the 386 processor. Throughout its production run, enhancements were made to expand hard disk size, increase processor frequency, and boost maximum RAM capacity. IBM ceased production of the Model 80 in 1992.
Development and release
On April 2, 1987, IBM unveiled the PS/2 Model 80 as part of the comprehensive PS/2 range—its second generation of personal computers following the original IBM PC introduced in 1981. The series included the entry-level Model 30, mid-tier Model 50, upper-midrange Model 60, and the top-of-the-line Model 80. While most models became available immediately in April, the Model 80’s debut was initially slated for late 1987 but was advanced to early July due to high demand and delays in shipping the Model 60.
Mark Dean, who served as chief engineer for the Model 80, had previously overseen development of both the IBM Personal Computer AT and the Industry Standard Architecture (ISA) bus. Initial assembly occurred at IBM’s Boca Raton plant in Florida alongside other PS/2 units. By early 1989, manufacturing shifted to Raleigh, North Carolina, where enhanced factory automation was implemented to increase production capacity. However, issues with new equipment resulted in defects that caused shortages of the sought-after Model 80 during a period of rising commercial interest in local area network (LAN) technology.
Specifications
The PS/2 Model 80 was IBM’s first desktop to incorporate the 32-bit Intel 80386 processor. Nonetheless, it was not IBM’s earliest PC-based system with a 386 chip; that title belongs to Compaq’s Deskpro 386, which debuted in September 1986. The Deskpro 386 was the first publicly available computer to utilize the 80386 CPU, advancing personal computing into true 32-bit processing and positioning Compaq as a leader in IBM PC compatibility. InfoWorld underscored this with a headline stating "Compaq Introduces 386 PC, Challenges IBM to Match It," quoting Compaq CEO Rod Canion who urged IBM to respond within six months or risk losing market share. IBM marketed the Model 80 as its premier system for running the forthcoming multi-user Operating System/2, jointly developed with Microsoft, which ultimately did not achieve commercial success.
As IBM’s second tower PC powered by an Intel processor, the Model 80 utilized the same case design as the Model 60 and included a carrying handle to facilitate moving its roughly weighty frame. It offered eight Micro Channel expansion slots: four were standard 16-bit, one was a specialized 16-bit slot with an extension designed for certain graphics adapter cards, and three were full 32-bit slots. Among initial PS/2 models, only the Model 80 featured these full-width Micro Channel slots until the introduction of the Model 70, a smaller machine built inside the chassis of the Model 50. Drive bays comprised two slots for 3.5-inch drives (typically populated with one floppy drive) and up to three bays for variously sized 5.25-inch drives—whether floppy, optical, or hard disks—mounted sideways due to spatial constraints within the case.
At launch, two configurations were available: Model 80-041 equipped with a ST-506 interface–based hard disk of 44 MB capacity and Model 80-071 featuring a faster ESDI hard disk sized at 70 MB. Both used a processor clocked at 16 MHz, matching Compaq’s original Deskpro 386 specifications. To surpass Compaq’s performance, IBM released an upgraded version—the Model 80-111—in late 1987 featuring a higher clock speed of 20 MHz and a larger ESDI hard drive of 115 MB along with an updated motherboard supporting faster speeds and more RAM. Despite this effort, Compaq again led by launching its own Deskpro 386/20 earlier that year. The subsequent Model 80-311 arrived in January 1988 boasting a processor running at 20 MHz paired with an expanded ESDI hard drive of approximately 314 MB.
By March of 1990, IBM rolled out three budget-friendly file server variants of the PS/2 Model 80 operating at an increased clock speed of 25 MHz and equipped with integrated SCSI hard drives and host adapters: entry-level Models 80-121 and 80-A21 both contained drives sized at roughly120 MB; meanwhile, the premium Model80-321 featured a unique high-capacity drive of about320 MB. Further updates appeared in October that year with Models80-081,80-161,and80-A16 offering assorted combinations of processor speeds (20 or25 MHz) alongside SCSI hard disk sizes ranging from80 to160 MB. After significant price cuts during this period, IBM discontinued production of the Model80 in1992 and replaced it with their PS/2 Server85.
Sales
The initial market performance of the Model 80 was modest, with IBM distributing approximately 100,000 units between July 1987 and January 1988. It trailed behind Compaq, whose Deskpro 386 series dominated more than 70% of the 386 workstation segment, with the Deskpro 386/20 alone selling 76,000 units in 1987. Factors contributing to the Model 80’s lackluster sales included its steep price, a scarcity of third-party 32-bit expansion cards, and doubts surrounding the future viability of the Micro Channel architecture. Dataquest forecasted only around 160,000 Model 80 units sold in 1988, compared to projections of 650,000 for the Model 50 and 215,000 for the Model 60. Although there was a temporary increase in demand fueled by expanding LAN products in early 1989, sales of the Model 80 soon declined again, accounting for under 7% of PS/2 sales from mid-1989 through early 1990. During this timeframe, only the Model 60 experienced poorer sales and was subsequently discontinued in 1990.
Reception
Initial assessments of the Model 80 were cautiously positive. Reviewers Steven Armburst and Caroline Halliday from PC Tech Journal highlighted that IBM’s forthcoming OS/2 operating system could validate the higher price point of the Model 80: "This is a machine with outstanding potential for the future that delivers top-quality performance today." They stressed that OS/2 would better exploit the capabilities of the Model 80's 80386 processor, thereby increasing its long-term value. Nevertheless, several critics observed that the Model 80 fell short in raw computational speed and graphics performance when compared with other contemporary 386 systems across all processor clock speeds.
Legacy
Despite its commercial shortcomings, the PS/2 Model 80 (together with the Model 60) played a pioneering role in introducing tower-style PC compatibles. By May 1988, more than a dozen manufacturers had unveiled tower desktop models at Comdex, as reported by The New York Times. By the mid-1990s, tower form factor computers had overtaken traditional horizontal desktops in terms of sales volume.
Submodels
80 8580-A21 i386 Intel 386 25 MCA, 32-bit 8 5/6 one 1.44 MB 120 MB (SCSI) 4 MB 8 MB VGA optional Tower {{date table sorting 1990 80 8580-A31 i386 Intel 386 25 MCA, 32-bit 8 5/6 one 1.44 MB 320 MB (SCSI) 4 MB 8 MB VGA optional Tower {{date table sorting 1990 03}}| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus | No. of slots |
No. of drive bays |
FDD | HDD | Stock RAM |
Maximum RAM |
Video adapter | Monitor | Form factor | Date introduced | Notes | Ref(s). |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 80 | 8580–041 | Intel 386 | 16 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 44 MB (ST-506) | 1 MB | 2 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–071 | Intel 386 | 16 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 70 MB (ESDI) | 1 MB | 2 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–081 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 80 MB (SCSI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–111 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 115 MB (ESDI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–121 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 120 MB (SCSI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–161 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 160 MB (SCSI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–311 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 314 MB (ESDI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting | ||
| 80 | 8580–321 | Intel 386 | 20 | MCA, 32-bit | 8 | 5/6 | one 1.44 MB | 320 MB (SCSI) | 2 MB | 4 MB | VGA | optional | Tower | Template:Date table sorting 1990 03 | ||
| 80 | 8580-A16 | i386 Intel 386
25 MCA, 32-bit 8 5/6 one 1.44 MB 160 MB (SCSI) 4 MB 8 MB VGA optional Tower Template:Date table sorting 1990 10 |
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