--- title: Compaq Portable II categories: - Computers types: - Professional Computer origins: - U.S.A. years: - '1986' cpus: - '80286' params: name: Portable II image: /media/museum/photos/compaq_portableii_system_s2.jpg company: /companies/compaq company_name: Compaq specs: - label: NAME value: Portable II - label: MANUFACTURER value: Compaq - label: TYPE value: Professional Computer - label: ORIGIN value: U.S.A. - label: YEAR value: '1986' - label: BUILT IN LANGUAGE value: None - label: KEYBOARD value: Full stroke 84-key with numeric keypad and 10 function keys - label: CPU value: '80286' - label: SPEED value: 6 ou 8 MHz - label: CO-PROCESSOR value: Socket for 80287 math coprocessor - label: RAM value: 640 KB on board, up to 2.1 MB - label: VRAM value: Unknown - label: ROM value: 16 KB (BIOS) - label: TEXT MODES value: 40 or 80 chars. x 25 lines (IBM CGA or monochrome modes) - label: GRAPHIC MODES value: 640 x 200 dots - label: COLORS value: 16 (Grey shades on built-in monitor) - label: SOUND value: Built-in loudspeaker - label: SIZE / WEIGHT value: 17.7 (W) x 13.9 (D) x 7.5 (H) in. / 26 lbs - label: I/O PORTS value: Serial, Parallel, external CGA monitor, Composite video - label: BUILT IN MEDIA value: 1/2 5.25'' 360 KB floppy disc drives, or 1 x FDD + 10 MB Hard disk - label: OS value: MS-DOS 3.1 - label: POWER SUPPLY value: Built-in 130 Watt switching power supply unit - label: PERIPHERALS value: 3 x AT slots available among 5 - label: PRICE value: From $3199 (Single FDD) to $4799 (HDD) tabs: - photos - links - docs forum_thread: 851 photos: - title: LARGE VIEW subtitle: '' text: '' image: /media/museum/photos/compaq_portableii_system_s3.jpg - title: RUNNING SYSTEM subtitle: '' text: Portable II running the Compaq Diagnostic program. image: /media/museum/photos/compaq_portableii_running_s1.jpg - title: TOP VIEW subtitle: '' text: The keyboard is a French "AZERTY" version. image: /media/museum/photos/compaq_portableii_topview_s1.jpg - title: SIDE VIEW subtitle: '' text: '' image: /media/museum/photos/compaq_portableii_sideview_s1.jpg - title: READY FOR CARRYING subtitle: '' text: '' image: /media/museum/photos/compaq_portableii_closed_s1.jpg - title: CONNECTORS subtitle: '' text: Sliding lids on either side of the casing cover the power switch and fan at left, and I/O ports at right (Colour and mono video outputs, serial and parallel ports). image: /media/museum/photos/compaq_portableii_connectors_s1.jpg - title: PORTABLE II PLATE subtitle: '' text: '' image: /media/museum/photos/compaq_portableii_plate_s1.jpg - title: 'INSIDE #1' subtitle: '' text: Under the plastic casing, the electronics is completely enclosed with a metallic cage. image: /media/museum/photos/compaq_portableii_inside_s1.jpg - title: 'INSIDE #2' subtitle: '' text: |- The mainboard is located below the CRT and drives.\ **(1)** Switching power supply unit\ **(2)** Intel "Above Board" 2 MB RAM expansion\ **(3)** CGA video card\ **(4)** Multi-IO card - Floppy and HDD drives controller, serial and parallel ports\ **(5)** Seagate 10 MB hard-disk drive. image: /media/museum/photos/compaq_portableii_inside_s2.jpg - title: EXPANSION CARDS subtitle: '' text: |- From top to bottom:\ • 2 MB above board\ • CGA video card\ • Multi-IO card image: /media/museum/photos/compaq_portableii_cards_s1.jpg links: - title: Web Wiz CAPTCHA url: http://www.webwizcaptcha.com text: '' docs: - title: MAINTENANCE & SERVICE GUIDE url: http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=321957&prodSeriesId=96335 cover: /media/museum/docs/couvs/nodoccover.gif text: |- [**MAINTENANCE & SERVICE GUIDE**](http://h20000.www2.hp.com/bizsupport/TechSupport/DocumentIndex.jsp?contentType=SupportManual&lang=en&cc=us&docIndexId=179111&taskId=101&prodTypeId=321957&prodSeriesId=96335)written by Compaq  type of document : PDF\  source : [Compaq Support Center](http://h20000.www2.hp.com/bizsupport/TechSupport/Home.jsp) related: - /museum/compaq-portable - /museum/compaq-portable-386 - /museum/compaq-portable-iii oc_id: 870 source: url: https://web.archive.org/web/20230604040910/http://www.old-computers.com/museum/computer.asp?c=870 date: '2023-06-04' --- After having invented the first IBM-compatible transportable computer, and having recorded half a billion dollars turnover, Compaq decided to launch its second portable AT clone. The system featured an 8 MHz processor and a 10 MB hard disk in a package 30% smaller and 20% lighter than previous PC model. The general engineering idea behind this machine was to provide a cut-down IBM PC/AT clone with fewer expansion slots (5), a small hard disk and a floppy disc. This allowed Compaq to make the Portable II smaller and lighter without sacrificing too much specification. Like many portable systems of the time, the keyboard attached to the front of the case and when the machine was ready for carrying, it was like a sewing machine. The machine was supplied with 640 KB of RAM which was the maximum that could be fitted to the main board. However, RAM could be taken up to 2.1 MB by using a custom-designed expansion card. Technically the Portable II gave its user more power than an IBM PC/AT for almost half the price.\ At the same time, Compaq delivered two desktop computers, the Deskpro PC/XT and Deskpro PC/AT, and two portable systems, the Portable/Plus PC/XT and the Portable 286 which was a full function PC/AT clone. --- **Lucio Libertini** says:\ The Portable 2 comes with a single 360kb 5.25" floppy drive, but it is compatible with 3.5" ones. Indeed, replacing the drive is the first thing that should be done, as 5.25" floppies in decent conditions are getting almost impossible to find, while 3.5" ones are still being manufactured. 360kb is also uselessly small for most applications. A suitable floppy cable is required for the modification, not to mention a caddy to put the smaller drive in the tray. One can always affix it in there with other means, but the result is most inelegant. The Portable 2 doesn't boot any MS-DOS bootdisk above version 3.2; 3.21, 3.3 and 6.22 didn't work. There is a likely exception: I didn't test MS-DOS 6.00 floppies, but the hard drive mine came with has that inside, so it must have been installed from floppies.\ The Portable 2 does boot DR-DOS floppies of versions 3.41 and 6.00 (5.00 untested), but 6.00 is awfully slow, so I suggest sticking with the older version. The compaq diagnostic floppy that's required for BIOS setup is incredibly hard to find; after extensive Googling I managed to find a floppy image that contained the required programs, but wasn't bootable. I made a bootable floppy with DR-DOS 3.41 and the diagnostics; you can find it [here](http://www.technfun.com/software/cp2-drdos341-diags.zip). It's a raw image, writable with rawwrite (and many other apps) under Windows and dd under Linux. The BIOS access program is setup.exe. **Mark Dodd's** memories:\ One arm is longer than the other after having to lug these things around for a year or so.\ We had several within Telecom Australia equipped with network sniffer cards and other addon cards for looking after the myriad of different network technologies that existed within the 84,000 employee behemoth.\ My biggest nightmare was getting caught between buildings at the end of the day so I had to lug the thing home on public transport. I remember one old fellow looking at it with amazement on the train and telling me how the same power used to take up two floors of a building. I told him it still weighs the same.... **Rob Brown** also remembers:\ This was the field service engineers nightmare. You were supposed to be Compaq trained to service this machine but very few engineers were. The main challenge was just getting it open. It was the first pc to use the torx type screws. You could not get hold of a torx screwdriver for love nor money in those days and I had a specially filed down flat head screwdriver which could just about turn a screw if wasn't too tight.\ Once you got the plastic case off, there was another steel case to contend with. There were a few access panels, but trying to get to the right components was really difficult. Then you had to put it back together, which was even harder.
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