A R6500/1EC IC. A beautiful white version. Week 40 1980, NMOS.
The R6500/1EC is a development IC for the R6500/1 microcomputer family.

Rockwell R6500/1 family

The R6500/1 is a 6502 , ROM (2K) 64 bytes RAM ,4×8 bit I/O, a 16 bit timer with I/O pin.
The ROM contents are factory mask-programmed, not programmable by the user.

This makes it a standalone microcomputer, no extra RAM/ROM or decode logic required.

There are no external address lines or data lines, the 6502 is all internal except the interrupt lines and clock.

Rockwell R6500/1EC

To develop applications with the R6500/1 Rockwell developed the R6500/1EC. This IC has the same pins as the R6500/1 but adds address and data lines and relies on an external ROM.

Downloads

	R6500/1 One-Chip Microcomputer
	R6500/1E Microprocessor Emulator Device
	R6500/1 Microprocessor Programming Reference Card