ANTIC Pinout Diagram

A vector graphic pinout is also available in Encapsulated PostScript format.

Key

• A0-A15: Memory address bus
• D0-D7: Memory data bus
• AN0-AN2: CTIA/GTIA bus (data type unknown)
• Vss: Ground
• LP: Light pen input
• RNMI: Non-maskable interrupt input
• NMI: Non-maskable interrupt output (to CPU)
• REF: RAM refresh output
• HALT: Halt output; suspends the CPU while ANTIC reads memory
• R/W: Read/write direction
• RDY: ANTIC pulls this pin low to halt the CPU when the WSYNC register is written, until the next horizontal blank occurs.
• Vcc: +5V power
• Ø2: Phase 2 input clock
• Ø0: Phase zero clock output
• FØ0: Fast phase 0 input clock
• RST: Resets ANTIC

Note: The information here is more fully documented in Atari's technical documents.

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