Firmware is software that resides in Read Only Memory (ROM) chips,
rather than on disk (actually EPROM for ultraviolet Erasable
Programmable Read Only Memory). To update your own firmware, you need an
EPROM programmer and a blank EPROM. Unless otherwise stated, the EPROM
type is 27C256, which can be programmed by most, even fairly old, EPROM
When you click on a link below, you will download HEX files for your
product and instructions on how to update your panel.
If you don't have a
programmer, you can order EPROMs from BUF for a charge of $30 each.