IBM PS/2 Model 90 XP 486
| Company type | Product line |
|---|---|
| Industry | Personal computers |
| Predecessor | IBM PC |
| Founded | April 1987 |
| Founder | International Business Machines Corporation (IBM) |
| Fate | Succeeded IBM PC line |
| Headquarters | United States |
Area served | Global |
| Products | Personal computers (desktops, towers, all-in-ones, portables, notebooks) |
| Owner | IBM |
| Parent | IBM |
The Personal System/2 (PS/2) series represented a range of personal computers engineered by International Business Machines Corporation (IBM). Launched in 1987, the PS/2 succeeded IBM's initial IBM PC lineup, which was phased out following the PS/2's debut in April 1987. Most models within the PS/2 family incorporated IBM's proprietary Micro Channel architecture (MCA) bus, an effort to regain influence over the PC industry. Nonetheless, certain entry-level versions continued to use the broadly adopted ISA bus found in earlier systems. The PS/2 portfolio encompassed various configurations, including desktops, tower units, integrated all-in-one systems, as well as portable and notebook computers.
Notes
- Legend
- Additional clarifications
- Variants identified by IBM part numbers (P/N) intended for markets outside North America are not included.
- Unless otherwise indicated, built-in or optional displays are CRT monitors.
- The Space Saving Keyboard is a compact 87-key design without a numeric keypad, derived from the Model M.
- The Model 25 Collegiate edition was aimed at university students, featuring dual 720 KB floppy drives, up to 640 KB of RAM, the official PS/2 Mouse, Windows 2.0, and four blank floppy disks.
- Financial workstation models incorporated a specialized 50-key function keypad tailored for banking tasks.
- LS ("LAN Station") models were diskless workstations lacking floppy or hard drives, connecting through Ethernet or Token Ring network adapters.
- Ultimedia variants came equipped with microphones, SCSI CD-ROM drives, M-Audio sound cards, volume controls, plus front-mounted headphone and microphone jacks.
- Array models functioned as PS/2 Servers with support for RAID configurations.
Primary series
... ... ... ... ... ...| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus type | Number of slots |
Number of drive bays |
FDD | HDD | Base RAM |
Maximum RAM |
Video adapter | Monitor type | Form factor | Launch date | Notes | Ref(s). | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 25 | 8525-001 | Intel 8086 | 8 (0 w) | ISA, 8-bit | 2 | 2 | one 720 KB | none | 512 KB | 640 KB | MCGA | 12-inch monochrome | All-in-one | Template:Date table sorting | Space Saving Keyboard included | ||||
| 25 | 8525-004 | Intel 8086 | 8 (0 w) | ISA, 8-bit | 2 | 2 | one 720 KB | none | 512 KB | 640 KB | MCGA | 12-inch color | All-in-one | Template:Date table sorting | Space Saving Keyboard included | ||||
| 25 286 | 8525-006 | Intel 80286 | 10 (1 w) | ISA, 16-bit | 2 | 2 | one 1.44 MB | none | 1 MB | 4 MB | VGA | 12-inch color | All-in-one | Template:Date table sorting | Space Saving Keyboard included | ||||
| Model | IBM P/N | Processor | Clock speed (MHz) | Bus type | Slots | Drive bays | FDD(s) | HDD capacity(s) | Base RAM | Maximum RAM | Video adapter(s) | Monitor options ( | optional) | Form factor ( | desktop, tower, all-in-one) | Introduction date ( | year/month) | Notes | |
| Model | IBM P/N | Processor | Clock speed (MHz) | Bus architecture (MCA or ISA) | Slots available | Drive bays count | Floppy disk drives | Hard disk sizes | Default RAM size | Maximum RAM supported | Video adapters included | Monitor choices ( | optional) | Chassis type ( | desktop, tower, all-in-one) | Release date ( | year/month) | Remarks | |
| Model | IBM P/N | Processor | Clock speed (MHz) | Bus system | Expansion slots | Drive bays | Floppy drives | Hard disk capacities | Starting RAM | Max RAM | Video adapters | Monitor configurations ( | optional) | Case style ( | desktop or tower) | Launch period ( | year/month) | Additional notes | |
| Model | IBM P/N | CPU | Operating frequency (MHz) | Bus type | Slots count | Drive bay count | Floppy drives present | Hard disk sizes available | Installed RAM | Expandable RAM limit | Video hardware | Monitor options ( | optional) | Enclosure type ( | desktop or tower) | Release timeframe ( | year/month) | Comments |
PS/2 Server
... [Similar entries omitted for brevity, retaining key variations in processor, RAM, storage] ...| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus | Number of slots |
Number of drive bays |
FDD | HDD | Base RAM |
Maximum RAM |
Video adapter | Monitor | Form factor | Release date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Server 85 | 9585-0X6 | Intel 486SX | 33 | MCA, 32-bit | 8 | 7 | one 2.88 MB | 104 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | Template:Date table sorting | |
| Server 85 | 9585-0X9 | Intel 486SX | 33 | MCA, 32-bit | 8 | 7 | one 2.88 MB | 160 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | Template:Date table sorting | |
| Server 85 | 9585-0XA | Intel 486SX | 33 | MCA, 32-bit | 8 | 7 | one 2.88 MB | 208 MB/212 MB (SCSI) | 8 MB | 64 MB | SVGA | optional | Tower | Template:Date table sorting | |
| Server 95 Array | 9595-3NT | Intel 486DX2 | 66 | MCA, 32-bit | 8 | 9 | one 1.44 MB | three times 1 GB (SCSI) | 8 MB | 256 MB | SVGA | optional | Tower | Template:Date table sorting |
Portables
| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus | Number of slots |
Number of drive bays |
FDD | HDD | Base RAM | Maximum RAM | Video adapter | Display | Form factor | Release date | Notes | Ref(s). | ||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IBM PS/2 P70 P70 |
8573-031 |
i386 Intel 386 |
16 |
style="background:#CCF" | Micro Channel architecture, 32-bit |
2 (one16-bit, one32-bit) |
0 |
one1.44MB |
30MB (ESDI) |
2MB |
8MB |
Monochrome gas plasma |
Portable |
Includes slot for optional i387 math coprocessor |
- |
IBM PS/2 P70 P70 |
8573-061 |
i386 Intel386 |
20 |
style="background:#CCF" | Micro Channel architecture,32-bit |
2 (one16-bit, one32-bit) |
0 |
one1.44MB |
60MB (ESDI) |
2MB |
8MB |
Monochrome gas plasma |
Portable |
Includes slot for optional i387 math coprocessor |
- |
IBM PS/2 P70 P70 |
8573-121 |
i386 Intel386 |
20 |
style="background:#CCF" | Micro Channel architecture,32-bit |
2 (one16-bit, one32-bit) |
0 |
one1.44MB |
120MB (ESDI) |
2MB |
8MB |
Monochrome gas plasma |
Portable |
Includes slot for optional i387 math coprocessor |
- |
IBM PS/2 P75 P75 |
8573-161 |
i486 Intel486 |
33 |
style="background:#CCF"|Micro Channel architecture,32-bit |
4 (two16-bit,two32-bit) |
0 |
one1.44MB |
160MB (SCSI) |
4MB |
16MB |
Monochrome gas plasma |
Portable |
| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus | No. of slots | Drive bays | FDD | HDD | Base RAM | Max RAM | Video adapter | Display | Form factor | Release date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
8573-401 |
33 |
style="background:#CCF"|Micro Channel architecture,32-bit |
4 (two16-bit,two32-bit) |
0 |
one1.44MB |
400MB (SCSI) |
4MB |
16MB |
Monochrome gas plasma |
Portable |
Integrated SCSI controller on planar board | ||||
|
8543-A44 |
20 |
style="background:#CFC"|Industry Standard Architecture,16-bit |
0 (1 via AT bus expansion port) |
0 |
one1.44MB |
60MB (IDE) |
2MB |
18MB |
Monochrome LCD |
Laptop |
|||||
|
8551-033 |
16 |
style="background:#FFC"|Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
40MB (IDE) |
2MB |
10MB |
Monochrome LCD |
Notebook |
unknown | ||||
|
8551-025 |
16 |
style="background:#FFC"|Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
2MB |
10MB |
Monochrome LCD |
Notebook |
|||||
|
8533-A33 |
16 |
style="background:#FFC"|Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
40MB (IDE) |
unknown |
unknown |
unknown |
Monochrome LCD |
Notebook | ||||
|
8533-A35 |
16 |
style="background:#FFC"|Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
unknown |
unknown |
unknown |
Monochrome LCD |
Notebook | ||||
|
8554-045 |
16 |
style="background:#FFC"|Proprietary |
2 (PC Card) |
unknown |
one1.44MB |
80MB (IDE) |
2MB .| 16MB .| .| Color TFT. .| Laptop. .| |
Related systems
... [similar Academic System entries omitted for brevity] ... Clinical Workstation ... [similar EduQuest entries summarized] ... Executive Workstation ... [Industrial Computer entries compressed] ...| Model | IBM P/N | CPU | Operating frequency (MHz) |
Bus type | Number of slots |
Number of drive bays |
FDD | HDD | Installed RAM |
Maximum RAM |
Graphics adapter | Display | Chassis type | Launch date | Remarks | Ref(s). |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Academic System | 6152-022 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 20 MB (ST-506) | 2 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; cannot run simultaneously with 286 | |
| Academic System | 6152-024 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 20 MB (ST-506) | 4 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; cannot run simultaneously with 286 | |
| Academic System | 6152-044 | Intel 80286 ROMP 032 |
10 (286) | MCA, 16-bit | 8 | 4 | single 1.44 MB | 44 MB (ST-506) | 4 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | ROMP CPU on daughterboard; cannot run simultaneously with 286 | |
| 7690 | Intel 8086 | 8 (0 w wait states) | Industry Standard Architecture (ISA), 8-bit | 4 | none | single 1.44 MB | none | 640 KB | 8 MB | Multi-Color Graphics Array (MCGA) | Monochrome LCD | Mobile workstation | ||||
| 7496 | Intel 8086 | 8 (0 w wait states) | ISA, 8-bit | 3 | none | single 720 KB | none | 640 KB | 640 KB | MCGA | Monochrome | All-in-one | Template:Date table sorting | |||
| Various Intel CPUs (80286, i386, i486) operating between 10 and 50 MHz speeds. | Combination of MCA and ISA buses, featuring mostly rugged modular construction suitable for industrial settings. | Up to eight expansion slots; up to three drive bays. | Typically equipped with one or two floppy drives at 1.44 MB capacity. | Hard disk options range from none up to over 240 MB (ESDI or SCSI). | RAM configurations span from several hundred KB to multiple tens of MB. | VGA or EGA graphics adapters; monitor optional. | Available in benchtop, rack-mounted, or portable configurations. | Released during the late '80s to early '90s period. | ||||||||
| Intel 8086 processors clocked at 8 MHz using an ISA bus, engineered as dedicated word processing machines. | No expansion slots; typically two drive bays hosting one or more floppy drives (720 KB standard or optional). | Optional hard drives up to approximately 20–30 MB. | Memory fixed near the size of about 640 KB. | MCGA graphics adapters with monochrome or color display options. | Desktop chassis introduced mid to late ’80s. | |||||||||||
| Intel CPUs ranging from the original to the Intel 80286, running up to roughly 10 MHz. | ISA bus offering two expansion slots; floppy drives standard at one or two units supporting up to a capacity of 1.44 MB. | Optional hard disk drives available up to around ~30 MB. | Memory starts at roughly one megabyte and upwards. | VGA graphics adapters; monitors offered optionally. | Desktop form factor debuted in the late ’80s, focusing on word processing and networking features. |