You do not need to program 27011. Those chips are very old and unreliable, and also hellishly non-standard. If you replace it you are only replacing a bad chip with another unreliable chip.
The correct way is to make a small PCB adapter and use a modern EPROM.
For example like the pic I attached which is an adapter I made. These are sent off and produced at places like PCBWay or JLCPCB and you can get 5 for $2. Program a normal EPROM, plug it in and it will last at least 30 years. |
