This is based on a 8255 expansion of the port Keil decoder firmware, the drive to achieve the right fat32 control. Not very easy to find online.

fat32
fat32.c
fat32.h
fat32.lnp
fat32.LST
fat32.M51
fat32.OBJ
fat32.Opt
fat32.plg
fat32.Uv2
fat32.__i
fat32_Opt.Bak
fat32_Uv2.Bak
FAT_TEST.C
FAT_TEST.LST
FAT_TEST.OBJ
FAT_TEST.__i
fileio.c
fileio.h
fileio.LST
fileio.OBJ
IDE_LIB.C
IDE_LIB.H
IDE_LIB.LST
IDE_LIB.OBJ
IDE_TEST.LST
IDE_TEST.OBJ
STARTUP.A51
STARTUP.LST
STARTUP.OBJ
timertest.LST
timertest.OBJ
TIMERTICK.C
timertick.h
TIMERTICK.LST
TIMERTICK.OBJ
util.c
util.h
util.LST
util.OBJ

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