Implement SD bootloader

rjhelms / compe6502

Homebrew 6502 system

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Open rjhelms opened 2 years ago

rjhelms commented 2 years ago

Optimize & port Petit FatFs to load a system file from SD card on boot.

Don't need many features:

FAT16 support only
load in 512-byte blocks - can remove logic in pf_read to figure this out
file name is fixed, and in root directory - so don't need logic for traversing directory tree

rjhelms commented 2 years ago

6502 is a little-endian system, so ld_word and ld_dword are unnecessary