IBM PCjr (type 4860) were a home computer something similar and a more inexpensive variant IBM PC. It was developed by IBM, after it admits became that itself the comparatively expensive PC not when computer for the average home user could intersperse. On 1 November 1983 introduced to the public, computer however a flop due to its limited capacity and still expensive price, which was tried to make later in vain with IBM the PC JX again good, became.

Technology

It ordered like the PC over Intel 8088 as CCU, which was clocked with 4.77 MHz. The memory equipment amounted to likewise 64 KB, was increasable however only on 128 KB. The possibility of adding the computer with extension cards new functions in addition was limited however to a so-called Sidecar connection (English for sidecar), for which also memory expansions to altogether 512 KB were available. Sidecar extensions were flat housing, which could be stuck on simply at the right side to the computer. Programs could be loaded as with the PC over 5.25 " - floppy disk drive or an Kasettenrecorder entrance. Additionally there were two card locations for cartridges, which for example an extended version of the integrated Microsoft BASIC or plays could contain at the front. A further characteristic was the inexpensive keyboard, which slackly over one [infrared] - interface with the front was connected with the computer. The PCjr was supplied completely with monitor

The PCjr came into two variants: The Model 4, which represents the original PCjr, and which Model 67, an extended version with among other things an additional floppy disk drive.

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• IBM PCjr
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• IBM PCjr - Wikipedia, the free encyclopedia
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• IBM PCjr - Wikipedia, the free encyclopedia
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• OLD-COMPUTERS.COM : The Museum
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