Apple IIc "Rev. 4" (1 Jan 1988 Jahr – 1 Aug 1988 Jahr)

Beschreibung:

In January 1988, a new ROM firmware update was issued to address bugs in the new memory-expandable IIc. Changes included better detection of installed RAM chips, correction of a problem when using the serial modem port in terminal mode, and a bug fix for keyboard buffering. The ROM upgrade was available free of charge only to owners of the memory expansion IIc. This was the final change to the Apple IIc; it would be superseded that September by the Apple IIc Plus (identified as ROM version ‘5’).

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