Things were more laid back in the 1970s and ’80s, when code was stored unencrypted in standard EPROM chips, or, for high-volume applications, in mask ROMs integrated in microcontrollers.

A device that wrote instructions and data into EPROM chips. Some earlier units were capable of programming both PROMs and EPROMs. See EPROM. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other ...

To erase the data, the EPROM chip is exposed to ultraviolet (UV) light, which clears the charge from the floating gates, returning the cells to their default state. Once the chip has been erased ...

Turn on the EMP-20 Programmer (in back). There is a power light next to the ZIF socket (Zero Insertion Force) and the ZIF’s handle should be straight up. Set the "T" switch on the shelf next to the ...

If you’ve ever worked on a system that loads its software from a ROM or EPROM, you know how much of a hassle it can be to make frequent changes to the code. Pulling the chip, flashing it ...

Although ultraviolet (UV) light is widely known as a disinfectant, it was also used to erase EPROM chips. After several minutes of exposure to UV light, the chip can be programmed again (see EPROM).