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I > IBM  > PC Portable - Model 5155   

PC Portable - Model 5155

This computer was the portable version of the PC XT.
It was also the second IBM's "transportable" computer. The first one was the IBM 5100, the first personal portable computer ever built that was released in September 1975

The OS was the PC-DOS 2.1, first delivered with the PC Junior.

The portable was equipped with a 9'' amber screen which could display texts and graphics.

It offered 7 extension slots, 5 being free (4 shorts and only 1 long).

The main drawback of the Portable is that it was not delivered with a hard-disk, and it weights a lot (30lbs) !. On the other hand, it used the same mother board as the IBM 5150 (the classic PC form factor). This enable an such enclined person to be able to upgrade this computer up to a Pentium II !


Paul Reitman's memories:
The portable PC XT was my first “laptop” computer, and as an owner of a modern portable today, thinking back about this one just blows my mind.
I was an IBM Information Developer at the time writing the User’s Guide for the XT and I was doing it on this beast – in a text file and in IBM Script which looks a lot like HTML today. But the interesting part of this story is that I had taken the box home to work – yes, I was one of the first work-at-homers to try it out – and while trying to get it up to the den I DROPPED IT DOWN THE STAIRS.
It really weighed what felt like a ton, and after lugging it all the way home I was worn out, and must have let the handle slip through my sweaty grip. Well, the box bounced down at least 30 steps or so end over end while I watched in horror, already calculating how I would explain this to my boss, who already thought I was a freak because I wanted to illustrate the user’s guides with a yellow duck. To my amazement, I took the portable apart, reseated all the cards, and it powered right back up. Good as new.
Try that today with a portable computer!

Please consider donating your old computer / videogame system to or one of our partners from anywhere in the world (Europe, America, Asia, etc.).


I have to concur with Curtis. The motherboard in used the 5155 was an XT board.

Tuesday 22nd June 2010
Frank (The Netherlands)

The entry is WRONG!

The motherboard used in this unit was a standard XT motherboard with 8 slots.

Sunday 24th August 2008
Curtis McCain (TX/USA)
My collection

I still have one of these, complete with documentation and canvas case. Hardware mods on my machine include an 286 (31Mhz equivalent of XT) motherboard; 1Mb of memory; SCSI 80 Mb hard disk, PCjr monitor; power switch for internal monitor; and a 1200 baud modem. It worked a few years ago the last time I tried powering it up.

Tuesday 6th November 2007
Erich Hespenheide (Earth)


NAME  PC Portable - Model 5155
TYPE  Transportable
YEAR  1984
KEYBOARD  QWERTY / AZERTY mechanical keyboard
10 function keys and numeric keypad, 83 keys
CPU  Intel 8088
SPEED  4.77 Mhz
CO-PROCESSOR  8087 arithmetic co-processor
RAM  256 kb (up to 640 kb)
ROM  40 kb
TEXT MODES  25 x 80
GRAPHIC MODES  CGA modes : 320 x 200 / 640 x 200
COLORS  9'' built-in amber display
SOUND  Beeper
SIZE / WEIGHT  50 x 43 x 20 cm / 13,6 kg
I/O PORTS  7 expansion slots
BUILT IN MEDIA  1 or 2 x 5''1/4 disk-drives (360k)
OS  PC-DOS 2.1
POWER SUPPLY  100-240 v, 50-60 Hz
PRICE  3811 (France, 84)

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