Ported from Arduino-Plcc-Flash-Programmer.
Simple C program that implements a Plcc Flash Programmer for flashroms that use the LPC Protocol. Should work with any Raspbian Distro. I've tested it with Retropie on PI 2 MODEL B.

-Uses 6 GPIO pins from the Raspberry Pi pin header (GPIO16, GPIO22, GPIO23, GPIO24, GPIO25, GPIO27 )
-Git-Core should be preinstalled for WiringPi library clone.
-WiringPi library should be preinstalled in order for the program to compile.

Clone the repository cd into the repo folder and then compile with:

$ gcc flasher.c -l wiringPi -o flasher

Then to run:

$ ./flasher

The output shows the usage help and parameters:

pi@retropie:~/flasher $ ./flasher
LPC PLCC Flash Programmer
Usage: ./flasher -[switch] [parameter]
Switch:
 -w   [filename]      Write to flash (flash should be erased)
 -es                  Erase flash sector by sector
 -eb                  Erase flash block by block
 -sec [Sector Number] Erase specific sector
 -r   [filename]      Save the flash to file
 -id                  Read the Chip ID
 -jid                 Read the JDEC Chip ID
 -fs                  Read the flash to screen

Examples: -To read the flash into a file (backup.bin).

$ ./flasher -r backup.bin

-To program the flash with bin file (bios.bin).

$ ./flasher -w bios.bin

If you need an adapter to interface with the plcc chip, I've provided a simple and cheap pcb schematic. Just print the plcc_adapter.pdf at 1:1 scale with a laser printer on glossy or photographic paper. Then use your favourite pcb etching method. And you have plcc adapter to work with. Only needs some pin headers and a plcc socket(from an old motherboard maybe!).

Work In Progress!