Bad Apple on 32K EEPROM (No CPU)

Опубликовано: 13 Март 2026
на канале: Ian Ward

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Full details:
https://excess.org/bad-apple/

Featuring:

complete Bad Apple video playback (3m36s)
no CPU/microcontroller
video stored on one AT28C256 32K EEPROM (below screen)
video displayed on a 20x4 LCD character display with an HD44780 controller (8 CGRAM characters, 8x4 video area)
clock module with 555 timer running at 150Hz
16-bit counter with 74LS163 ICs, 15 bits set address of video EEPROM, high bit stops clock module
256-byte lookup table on a second EEPROM (left of screen) converts 8-bit video playback EEPROM output to 9-bit LCD input (RS + D0 through D7)

Bad Apple on Everything playlist:
• Bad apple on everything

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