I have the main unit.
type computer
country USA
year 1990
os IBM DOS 3.3
cpu Intel 486
speed 33 MHz
ram 8 MB
disk 1.44 MB
hd 400 MB SCSI
graphic built-in 10″ Plasma dot matrix VGA 640×480
colors 16 gray scale
sound beeper
ports SCSI, Storage device connector, serial, parallel, mouse, keyboard
The IBM PS/2 P75 486 — 486-Powered PS/2 Portable
The IBM PS/2 P75 486 was an advanced configuration of IBM’s PS/2 portable series, using the Intel 486DX processor to deliver top-tier performance in portable form. The 486DX brought integrated floating-point processing that the 386DX required a separate coprocessor to match, along with substantially faster integer performance and an on-chip cache that dramatically improved real-world speed. In the PS/2 P75 configuration, this processor was combined with IBM’s Micro Channel Architecture for a portable workstation that could handle demanding professional applications.
486 Performance in 1990
The Intel 486DX, introduced in 1989, represented a significant performance leap over the 386DX — delivering roughly twice the performance at equivalent clock speeds through its integrated FPU, larger on-chip cache, and improved pipeline design. For IBM’s professional customers running engineering CAD, financial modelling, and database applications, the 486’s performance advantage over 386-class systems was immediately and practically significant. Having 486 performance in a transportable package was a genuine competitive differentiator for IBM’s enterprise portable offerings.