Apple IIc "Rev. 0" (nov 1, 1985 – aug 1, 1988)
Description:
This update, introduced in November 1985, came in the form of an upgrade to the ROM firmware which doubled in size from 16 KB to 32 KB. The new ROM supported “intelligent” devices such as the Apple UniDisk 3.5-inch (800 KB) floppy drive and Smartport-based hardisks, in addition to an external 5.25-inch floppy drive. A new self-test diagnostic was provided for testing built-in RAM and other signs of logic faults. The Mini-Assembler, absent since the days of the Apple II Plus, made a return, and new Monitor “Step” and “Trace” commands were added as well. The upgraded ROM added rudimentary support for an external AppleTalk networking device which was yet to be developed. When attempting to boot virtual slot 7, users would encounter the message “APPLETALK OFFLINE.” The IIc, however, had no built-in networking capabilities, and no external device was ever released. The upgrade consisted of a single chip swap (and a trivial motherboard modification), which Apple provided free only to persons who purchased a UniDisk 3.5 drive. A small sticker with an icon of a 3.5-inch floppy diskette was placed next to the existing 5.25-inch diskette icon above the floppy drive port indicating the machine had been upgraded.
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