Enhanced EPROM Chip for Apple IIc - Features and Programming

Explore the enhanced firmware capabilities of the Apple IIc EPROM chip in this 35-minute conference talk from KansasFest. Discover the added features including the checkerboard power-on self-test, support for 3.5" Unidisk 800k floppy drives, and compatibility with 32 meg single-partition hard drives. Learn about the 27C256 28-pin DIP chip used to store firmware in the Apple IIc and its continued availability. Observe the process of erasing old firmware using UV light and the specialized hardware involved, such as the "Super Eprom Burner" interface card. Gain insights into modifying hidden features like the opening screen message during power-on. Examine the GANG-PRO-8 device for testing and duplicating EPROM chips. Finally, delve into the concept of sector-editing using Copy II Plus to customize software details on disks.

Apple IIc Enhanced EPROM Chip - Stephen Buggie (KansasFest/A24eVR 2023)