For sale is a 2513 Character ROM (CGR-001 RO-3-2513) replacement for Revision 4 and older Apple II / II Plus and Apple 1 computers.

The ROM that has been used to flash these chips can be found here:

https://p-l4b.github.io/2513

For compatibility for Apple 1 computers, diodes have been installed on the PCB to cater for the negative voltages coming from the Apple-1's IC 2519.

I have also built a custom tester which reads and verifies the data on these chips (See last photo)

Please contact me if you have any queries and I will be only too happy to answer them.

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