MOS 6510 Microprocessor

The 6510 8 bit Microprocessor with 8 bit bi-directional interface port

Internal I/O Port

The 6510 has an 8 bit I/O port built in. Only the lower 6 bits (P0…P5) are exposed on the 6510 (as used on the Commodore 64) whilst all 8 bits are exposed on the 6510-1 and 6510-2 processors by sacrificing the RDY & NMI signals.

The Data Direction Register is at address 0x0000 whilst the data port is at address 0x0001.

Last modified October 21, 2021: Add resources sections (5d6dbeb)