I have the main unit and power adapter.
type computer
country USA
year 1984
os PC-DOS 2.1. Basic
cpu Intel 8088 + 8087 arithmetec co-prosessor
speed 4,77 MHz
ram 256 KB
rom 40 KB
disk 1 x 5,1/4″ 360K floppy disk
graphic 9″ built-in amber, CGA 320×200 / 640×200
colors monochrome
sound beeper
ports 7 expansion slots
The IBM PC Portable Model 5155 — IBM’s Luggable
Released in February 1984, the IBM PC Portable (Model 5155) was IBM’s response to Compaq’s successful luggable portable PC — a self-contained, transportable IBM PC-compatible computer combining the processor, memory, two floppy drives, and a 9-inch monochrome CRT display in a single briefcase-style enclosure weighing approximately 14 kg. Priced at $2,795, it offered genuine IBM PC compatibility in a form factor that could be transported between offices and used wherever a power outlet was available.
IBM’s Reluctant Entry into Portables
The IBM PC Portable arrived almost two years after Compaq had demonstrated with its original portable that there was a significant market for transportable IBM-compatible computers. IBM’s delay reflected the company’s slower development processes compared to the nimble clone manufacturers, and by the time the 5155 arrived, Compaq had already established itself as the standard for portable IBM-compatible computing. The 5155 was essentially identical in capability to the original IBM PC but in portable form — using the same 8088 processor and operating at the same 4.77 MHz.
Legacy
The IBM PC Portable was not a commercial success — it arrived late, was heavier than Compaq’s offering, and ran on mains power only with no battery capability. It was discontinued in 1986 after modest sales. However, it represents IBM’s acknowledgement that portable computing was a legitimate market, a recognition that would eventually lead to the iconic ThinkPad laptop line that IBM introduced in 1992.