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Per request, keep hard drive type in boot block.

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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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5
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;
}