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Per request, keep hard drive type in boot block. 

Update the .PhysicalDrive in boot block.
Update the first fat entries to match MediaDescriptor of boot block.
This commit is contained in:
Henry Gabryjelski 2019-03-12 12:09:49 -07:00
parent e2afc36dae
commit 12bb62eadd
1 changed files with 4 additions and 3 deletions
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7
src/usb/uf2/ghostfat.c
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@ -106,10 +106,11 @@ static FAT_BootBlock const BootBlock = {
.FATCopies = 2,
.RootDirectoryEntries = (ROOT_DIR_SECTORS * 512 / 32),
.TotalSectors16 = NUM_FAT_BLOCKS - 2,
.MediaDescriptor = 0xF0,
.MediaDescriptor = 0xF8,
.SectorsPerFAT = SECTORS_PER_FAT,
.SectorsPerTrack = 1,
.Heads = 1,
.PhysicalDriveNum = 0x80, // to match MediaDescriptor of 0xF8
.ExtendedBootSig = 0x29,
.VolumeSerialNumber = 0x00420042,
.VolumeLabel = VOLUME_LABEL,
@ -187,7 +188,7 @@ void read_block(uint32_t block_no, uint8_t *data) {
if (sectionIdx >= SECTORS_PER_FAT)
sectionIdx -= SECTORS_PER_FAT;
if (sectionIdx == 0) {
data[0] = 0xf0;
data[0] = 0xf8;
for (int i = 1; i < NUM_INFO * 2 + 4; ++i) {
data[i] = 0xff;
}
@ -210,7 +211,7 @@ void read_block(uint32_t block_no, uint8_t *data) {
d->startCluster = i + 2;
padded_memcpy(d->name, inf->name, 11);
}
}
}
} else {
sectionIdx -= START_CLUSTERS;
if (sectionIdx < NUM_INFO - 1) {