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Portable II

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.

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.