What is it? | |||
This is a complete kit for an Atmel 28C256 adapter. (Does NOT include Atmel 28C256) | |||
Kit comprises of: | |||
1 x PCB | |||
1 x 47k Resistor | |||
2 x 14 way header | |||
1 x 4 way DIP switch | |||
1 x 28 pin DIL socket | |||
Why did you make it? | |||
When I am developing programs for inclusion in the 27C256 EPROM of my 65C02 SBC, I find it really tedious having to keep UV erasing them for any program changes. | |||
This adapter allows me to program a 28C256 EEPROM and then fool my 65C02 SBC into seeing it as a 27C256. Any changes needed are programmed into the chip after changing the switch settings back to program mode. | |||
What makes it special? | |||
It is a very simple and useable design. |
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Switch Settings | |||
1 & 4 on, 2 & 3 off : Program 28C256 (Read and Write) | |||
1 & 4 off, 2 & 3 on : Read 27C256 | |||
(c) 2021,2022,2023 Paul Bartlett |