IBM PS/2 Model 35 LS
 IBM logo | |
| Company type | Product line |
|---|---|
| Industry | Computer hardware |
| Founded | 1987 |
| Founder | International Business Machines Corporation (IBM) |
| Headquarters | Armonk , United States |
| Products | Personal computers, servers, portable computers, laptops, notebooks |
| Parent | International Business Machines Corporation (IBM) |
The Personal System/2 (PS/2) was a series of personal computers introduced by International Business Machines Corporation (IBM). Launched in 1987, the PS/2 marked IBM's second generation of personal computers, succeeding the original IBM PC lineup, which was discontinued following the PS/2 announcement in April 1987. The majority of PS/2 units incorporated IBM's proprietary Micro Channel architecture (MCA) bus, an initiative aimed at reestablishing IBM's dominance in the PC market. Nevertheless, certain entry-level configurations utilized the widely adopted Industry Standard Architecture (ISA) bus, an open standard from previous IBM PC models. The PS/2 family encompassed various designs including desktops, towers, all-in-one systems, portable computers, laptops, and notebooks.
Notes
- Legend
- Explanatory notes
- Models with IBM part numbers (P/N) assigned to products manufactured and distributed outside North America are not included.
- Unless otherwise noted, built-in or optional displays are CRT monitors.
- The Space Saving Keyboard is a compact 87-key version of the Model M without a numeric keypad.
- The 25 Collegiate model was tailored for college students, featuring dual 720 KB floppy drives, up to 640 KB of RAM, and bundled with the official PS/2 Mouse, Windows 2.0, plus four blank floppy disks.
- Financial workstation variants incorporated a 50-key function keypad designed specifically for banking applications.
- LS models ("LAN Stations") were diskless workstations that operated without floppy or hard drives, connecting through Ethernet or Token Ring network adapters.
- Ultimedia editions included integrated microphones, SCSI CD-ROM drives, M-Audio sound cards, volume controls, and front-panel headphone/microphone jacks.
- Array models served as PS/2 Servers equipped with RAID support.
Primary lineup
| Model | IBM P/N | Processor | Clock speed (MHz) |
Bus | Number of slots |
Number of drive bays |
FDD | HDD | Standard RAM |
Maximum RAM |
Video adapter | Monitor | Form factor | Release date | Remarks | 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 | [1] |
| 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 | [1] |
- Note: This excerpt presents a selection of principal IBM PS/2 models highlighting processor specifications, bus type, memory capacity, and form factor details relevant to professionals researching legacy hardware configurations.*
PS/2 Server
... (similar entries omitted for brevity) ...| Model | IBM P/N | CPU | Frequency (MHz) |
Bus type | Expansion slots | Drive bays | FDD | HDD | Default RAM | Max RAM | Video card | Display | Case type | Launch 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 | |
| Premium Server 95 | 9595-Z0x | Intel DX2 / Intel Pentium | 66 | Micro Channel architecture, 32-bit | 8 | 7 | one 2.88 MB | 1 GB (SCSI) | 8 MB | 256 MB | Super VGA | optional | Tower | Template:Date table sorting
Preloaded with IBM LAN Server or NetWare |
|
| Advanced dual-processor configurations featuring RAID and hot-swappable drives: | |||||||||||||||
| Model | IBM P/N | CPU(s) | Frequency (MHz) | Bus system | Slots | Drive bays | FDD | HDD | Base RAM | Max RAM | Video card | Display | Enclosure type | Release date | Additional info |
| Server 295 | 8600-001 / -002 | Dual i486 processors | 33 / 50 | Dual, 32-bit Micro Channel architecture | 12 | 10 | one 1.44 MB | up to 1 GB (SCSI) | up to 32 MB | up to128 MB | Super VGA | optional | Tower | Template:Date table sorting
Supports RAID-5 and hot-swappable drives up to28 GB; compatible only with specific IBM disks. Some models offer optional dual processors. | |
| Server195 | 8600-003 | Two ×i486 | 50 | Dual,32-bitMicro Channel architecture | 12 | 10 | one1.44MB | up to1GB(SCSI) | 32MB | 128MB | Super VGA | optional | Tower | Template:Date table sorting
Comes standard with dual processors; supports RAID-5 and storage up to28GB; compatible only with IBM disks. | |
Portables
| Model | IBM P/N | CPU | Frequency (MHz) |
Bus type | Expansion slots count | Drive bays count | FDD | HDD | Default RAM size | Maximum RAM size | Video card type | Display type | Form factor type | Launch date | Notes | Ref(s). |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| IBM PS/2 P70 P70 | 8573-031 | "Intel i386" | "16" | Micro Channel architecture,32-bit | "2 (one16-bit, one32-bit)" | "0" | "one1.44MB" | "30MB (ESDI)" | "2MB" | "8MB" | "VGA" | "Monochrome gas plasma" | "Portable" | "Template:Date table sorting" | "Includes slot for optional i387 coprocessor" | |
| "IBM PS/2 P70 P70" | "8573-061" | "Intel i386" | "20" | MCA,32-bit | "2 (one16-bit, one32-bit)" | "0" | "one1.44MB" | "60MB (ESDI)" | "2MB" | "8MB" | "VGA" | "Monochrome gas plasma" | "Portable" | "Template:Date table sorting" | "Slot available for optional i387 coprocessor" | |
| "IBM PS/2 P70 P70" | "8573-121" | "Intel i386" | "20" | MCA,32-bit | "2 (one16-bit, one32-bit)" | "0" | "one1.44MB" | "120MB (ESDI)" | "2MB" | "8MB" | "VGA" | "Monochrome gas plasma" | "Portable" | "Template:Date table sorting" | "Supports optional i387 coprocessor slot" | |
| "IBM PS/2 P75 P75" | "8573-161" | "Intel i486" | "33" | MCA,32-bit | "4 (two16-bit, two32-bit)" | "0" | "one1.44MB" | "160MB (SCSI)" | "4MB" | "16MB" | "VGA" | "Monochrome gas plasma" | "Portable" | "Template:Date table sorting" | 'Equipped with integrated SCSI controller' | |
| "IBM PS/2 P75 P75" | 8573-401 | Intel i486 | 33 | MCA,32-bit | 4 (two16-bit, two32-bit) | 0 | one1.44MB | 400MB (SCSI) | 4MB | 16MB | VGA | Monochrome gas plasma | Portable | Template:Date table sorting | Includes built-in SCSI controller | |
| \L40 SX | 8543-A44 | Intel i386SX | 20 | \ISA,16-bit | 0 (1 with AT bus expansion port) | 0 | one1.44MB | 60MB (IDE) | 2MB | 18MB | VGA | Monochrome LCD | Laptop | Template:Date table sorting | ||
| \N51SX | 8551-033 | Intel i386SX | 16 | Proprietary | 2 (PC Card) | \unknown | one1.44 | 40MB (IDE) | 2MB | 10MB | VGA | Monochrome LCD | Notebook | \unknown | ||
| \N51SLC | 8551-025 | _IBM386SLC_ | _16_ | Proprietary_ | _2 (PC Card)_ | _unknown_ | _one1.44_ | _80MB (IDE)_ | _2MB_ | _10MB_ | _VGA_ | _Monochrome LCD_ | _Notebook_ | _unknown_ | ||
| _\N33SX_ | _8533-A33_ | _Intel i386SX_ | _16_ | Proprietary_ | _2 (PC Card)_ | _unknown_ | _one1.44_ | _40MB (IDE)_ | _unknown_ | _unknown_ | _unknown_ | _Monochrome LCD_ | _Notebook_ | _unknown_ | ||
| _\N33SX_ | _8533-A35_ | _Intel i386SX_ | _16_ | Proprietary_ | _2 (PC Card)_ | _unknown_ | _one1.44_ | _80MB (IDE)_ | _unknown_ | _unknown_ | _unknown_ | _Monochrome LCD_ | _Notebook_ | _unknown_ | ||
| _\CL57 SX_ | _8554-045_ | _IBM386SLC_ | _16_ | Proprietary | _2 (PC Card)_ | _unknown_ | _one1.44 | _80MB (IDE)_ | _2MB | _16MB | _VGA | _Color TFT | _Laptop | _unknown |
Related Systems
IBM Executive Workstation 7496 Intel8086 8 (0 w) style="background:#FCC"|ISA,8-bit 3 slots 0 drive bays one720 KB FDD no HDD 640 KB RAM standard and maximum capacity MCGA graphics adapter Monochrome display monitor All-in-one configuration Released September1989 Designed specifically for healthcare environments; intended to complement IBM7690 Clinical Workstation GE Fanuc Workmaster II 7186 Intel386 16 MHz style="background:#CCF"|MCA,32-bit No expansion slots or drive bays available One1.44 MB floppy drive 30 MB ESDI hard disk 2 MB RAM standard; expandable to a maximum of8 MB VGA graphics adapter Monochrome gas plasma display Portable design Introduced March1990 Industrial-grade PS/2 model marketed by General Electric Fanuc Industrial Computer lineup: 7552-040 – Intel80286 running at10 MHz; hybrid ISA/MCA bus; rugged rack-mount modular system called "Gearbox," debuted October1986 prior to PS/2 release. 7552-140 – Similar to above but includes one floppy drive module and supports up to40 MB hard disk. 7541 – Intel80286 with MCA bus; benchtop rugged industrial PC supporting ESDI drives. 7542 – Rack-mounted counterpart of the7541. 7561 – Intel386 at20 MHz with MCA bus; benchtop rugged industrial computer. 7562 – Rack-mount version of the7561. 7546 – Intel386SX operating at20 MHz with MCA bus; supports SCSI drives up to400 MB. 7568 series (040,150,C40,D40) – Featuring Intel386 and Intel486 CPUs; hybrid MCA and ISA buses via adapter; modular rack-mount industrial PCs named "Gearbox800," launched between late1989 and1991. Personal Typing System models (6901-001 through -006) – Desktop word processing units based on Intel8086 with ISA bus and MCGA graphics; options include monochrome or color displays and bundled word processing software such as Wheelwriter or Quietwriter; released July1987. Personal Typing System/2 (6907) – Upgraded version offering two ISA slots and networking capabilities introduced July1989. Personal Typing System/2 286 (6908) – Intel80286-based model featuring VGA graphics and network expansion options introduced July1989.| Model | IBM P/N | CPU | Clock Rate (MHz) |
Bus Type | Expansion Slots |
Drive Bays |
FDD | HDD | Base RAM |
Max RAM |
Video Card | Display | Chassis Type | Launch Date | Remarks |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | Features ROMP processor on daughterboard; cannot operate 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 | Includes ROMP processor on daughterboard; not compatible for concurrent use 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 | |
| Academic System | 6152-048 | Intel 80286 ROMP 032 |
10 (286) | MCA,16-bit | 8 | 4 | single 1.44 MB | 44 MB (ST-506) | 8 MB | 8 MB | VGA | optional | Tower | Template:Date table sorting | |
| Academic System | 6152-074 | Intel 80286 ROMP 032 |
10 (286) | MCA,16-bit | 8 | 4 | single1.44MB | 70MB (Enhanced Small Disk Interface - ESDI) | 4MB | 8MB | VGA | optional | Tower | Template:Date table sorting | |
| Academic System | 6152-078 | Intel80286 ROMP032 |
10 (286) | MCA,16-bit | 8 | 4 | single1.44MB | 70MBTemplate:Small (ESDI) | 8MB | 8MB | VGA | optional | Tower | Template:Date table sorting | |
| Clinical Workstation | 7690 | Intel8086 | 8 (0"w") | "ISA",8-bit | 4 | 0 | single1.44MB | none | 640KB | 8MB | "MCGA" | Monochrome LCD | Mobile workstation | 1989\}|09} | |
| "EduQuest" Thirty | "9603" | "IBM386SLC" | "25" | ISA,16-bit | "4" | "2" | "single1.44MB" | "30MB (IDE)" | "1–4MB" | "20MB" | "SVGA" | "14-in.color" | "All-in-one" | 1993\}|03} | |
| "EduQuest" Forty | "9604" | "Intel486SX" | "25" | ISA,16-bit | "4" | "2" | "single1.44MB" | "30MB (IDE)" | "4MB" | "20MB" | "SVGA" | "14-in.color" | "All-in-one" | 1993\}|03} | |
| "EduQuest" Fifty | "9605" | "Intel486SX" | "25" | ISA,16-bit | "4" | "2" | "single1.44MB" | "30MB (IDE)" | "4MB" | "20MB" | "SVGA" | "14-in.color" | "All-in-one" | 1993\}|03} | |
| 'EduQuest' Thirty-cs | '9606' | 'Cyrix Cx486SLC2' | '25/50' | 'style="background:#CFC;"' ISA,16-bit | '4' | '2' | 'single1.44MB' | 'unknown' | 'unknown' | 'unknown' | 'SVGA' | '14-in.color' | 'All-in-one' | 1994} | |
| 'EduQuest' Fifty-cs | '9608' | 'Intel486DX2' | '33' | 'style="background:#CFC;"' ISA,16-bit | '4' | '2' | 'single1.44MB' | 'unknown' | 'unknown' | 'unknown' | 'SVGA' | '14-in.color' | 'All-in-one' | 1994} | |
| 'EduQuest' Thirty-five | '9613' | 'Cyrix Cx486SLC2' | '25/50' | 'style="background:#CFC;"' ISA,16-bit | '4' | '2' | 'single1.44MB' | '133/256/342 MB (IDE)' | '4 MB' | 'unknown' | 'SVGA' | '14-in.color' | 'All-in-one' | 1994\}|09} | |
| 'EduQuest' Fifty-five | '9615' | 'Intel486' | '33–100' | 'style="background:#CFC;"' ISA,16-bit | '4' | '2' | 'single1.44MB' | '170/360/540 MB (IDE)' | '4 MB' | '64 MB' | 'SVGA' | '14-in.color' | 'All-in-one' | 1994\}|09} | |
| 'EduQuest Forty-five | '9614' |
'Intel486DX2' |
'50 or66' |
'style="background:#CFC;" ISA,16-bit' |
'4' |
'2' |
'single1.44MB' |
'unknown' |
'4 MB' |
'unknown' |
'SVGA' |
'14-in.color' |
'All-in-one' |
'Template:Date table sorting1995,09' |