Optimus 286

In the history of Polish computers, Optimus company is definitely worth describing. It was established in 1988 and imported components to build PCs. Later they expanded to embedded systems, shop terminals, multimedia / educational software and "Onet" internet portal, a very popular information source in Poland. Now remains of Optimus company are known as CD Projekt studios.
In late 1980s and early 1990s, socialism in Poland ended and private companies started to grow. Companies which evolved from "International ventures" failed very quickly as computers built from imported chips were not fast and compatible enough to compete with PC clones. Most successful businesses were related to importing boards and assembling computers. Optimus was one of such companies, some parts were imported, in early years some were made from scratch (e.g. cases), but PCs were assembled in Poland. Optimus flooded market with wide range of accessible PCs. There were ready sets, with strict specifications, as well as PCs built to order. Everyone could satissfy needs, using ready specification or composing own one. The quality was not perfect - Taiwanese parts in early 1990s were not very reliable, but were good enough to sell computers cheaper and most used units still hold in one piece. Optimus importing business ended in early 2000s by arresting their owner, then releasing after there was nothing to manage in company. Well, it turned out that communism hasn't ended totally in Poland.
This is an older PC, made around 1992 with Harris 286 processor. It has 1MB of RAM and 40MB IDE disk drive. Video card is Hercules one, with Polish character EPROM installed to add Polish diacritized characters support in Mazovia standard. As in many PCs from this age, there are two floppy drives - 3.5" and 5.25", as both disk formats were used these times. Another interesting thing is hard disk, it's a 3.5" IBM disk drive with 3.5-to-5.25" converter. Although casing has HDD LED, front panel of converter has its own light connected to hard disk's LED connector. I think that earlier versions of PCs with this casing had ST225-like disks, and my unit is one of the next series, but not ones with totally embedded disk. It is definitely a high-end 286, Harris CPUs were one of the fastest and not all 286s had IDE disk drives. It may be one of the last 286 computers made by Optimus.

Manufacturer Optimus

Origin Taiwan / Poland (assembly)
Year of unit 1992
Year of introduction 1992?
Class AT
CPU 286 (Harris)
Speed 20MHz / 8MHz
(640kB + 384kB)
Expandable by DIP or 30-pin SIMM modules
System diagnostics built-in.
Graphics Hercules-compatible
Sound PC Speaker
System expansion bus ISA 16-bit (6 slots)
ISA 8-bit (1 slot)
Floppy/removable media drives 1x 360kB 5.25" drive
1x 1.44MB 3.5" drive

Hard disk: IDE 40MB IBM WDA-L42S (C/H/S: 1067/2/39)

Peripherals in collection:
 - None

Other boards:


GW451C serial/parallel/game port expansion.

IDE-V4-002 IDE/FDD controller

Non-standard expansions: None
Operating system(s): MS-DOS 6.22

My unit is in quite bad condition. It was exposed to UV and casing falls apart. It has been repaired to working condition.

...And it has strange logo. Optimus logo was always rectangular, not square, here it's square. Optimus started to use rectangular logo since early 1993 or so, so the computer, or definitely casing, must be older.

The mainboard has rechargeable battery which tends to leak. It should be replaced with e.g. CR2032 through diode.

Contents: Starting, usage Configuration


The machine boots to a conventional AMI BIOS, then tries floppy drives and in the end hard disk. To enter Setup, press Del at boot. It should display menu for diagnostics, setup or restart.

In diagnostics, most hard disk-related functions are destructive





Mainboard is Taiwanese HT-12S, configuration is in TH99. If computer runs unstable, try to change frequency - with good memory chips, it can go up to 20MHz.