6502 Pinout Diagram

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

Key

• A0-A15: Memory address bus
• D0-D7: Memory data bus
• Vss: Ground
• RDY: Memory ready signal
• Ø1: Clock out (inverted Ø2)
• IRQ: Interrupt request signal
• NMI: Non-maskable interrupt signal
• SYNC: (unknown)
• Vcc: +5V power
• HALT: Halts the CPU
• R/W: Read/write direction
• Ø0: Clock in
• SO: Set Overflow flag
• Ø2: Sync / Clock out
• RST: Resets the CPU

Note: I have no confirmation of the above descriptions. This is just my best educated guess, using my knowledge of microcomputer design, the function of the 6502 processor, and the interaction between the custom IC's.

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