![]() The CGA display now supported several 16 color modes, and the PC speaker had three sound channels rather than one. ![]() The PCjr would use the same CPU 8088 4.77 Mhz of the IBM PC, but changes were made to the display and sound systems. The PCjr was designed with the intention of becoming a home variant of the IBM PC, competing with other computers such as the Commodore 64, the Atari 8 bit family or the Apple II. Their prize was around $1.565 and they found success in office use, especially after the release of spreadsheet software.īy the end of 1983, IBM announced the PCjr. They employed MDA and CGA display cards, 8088 CPUs running at 4.77 Mhz and could have as little as 16 Kb. ![]() When IBM launched the first PC models around 1981, they had little in common with the PC clones we use these days. I already mentioned these two computers in a previous guide, but since many DOS games offer some kind of support for them, I think a more in-depth explanation could be of interest to the readers.
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