Modifying the bootrom and adding new features (soon) - retrotruestory/M1DEV GitHub Wiki

It's easier than I thought to add a new feature. You need to:

    Modify the file: workspace/M1Dev/non_minix/bootloader/bloader.c and add the necessary code.

    Then, using the make command in the folder with the code, generate a new bloader.bin bootrom file.

    Next, open the generated file: 'bloader.bin' in a hex editor and add 'FF' padding until the file reaches the correct size for the EPROM memory you want to write to.

    Then, burn this modified file with the correct size of 32kb for the 27C256 EPROM using an EPROM programmer.

    Replace the EPROM in the Magic-1 with our one that has the modified code.

Here’s a simple example of a modification I added for testing purposes.