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fix byte indexing for drives

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This commit is contained in:
Speedy_Lex 2025-07-02 01:25:41 +02:00
parent 20fecebb90
commit 7c15adc305
1 changed files with 4 additions and 6 deletions
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10
src/components/drive.c
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@ -73,11 +73,10 @@ void nn_drive_writeSector(nn_drive *drive, void *_, nn_component *component, nn_
}
}
void nn_drive_readByte(nn_drive *drive, void *_, nn_component *component, nn_computer *computer) {
// TODO: calculate the right index aaaaargh
nn_value offsetValue = nn_getArgument(computer, 0);
size_t disk_offset = nn_toInt(offsetValue);
size_t disk_offset = nn_toInt(offsetValue) - 1;
size_t sector_size = drive->getSectorSize(component, drive->userdata);
int sector = disk_offset / sector_size;
int sector = (disk_offset / sector_size) + 1;
size_t sector_offset = disk_offset % sector_size;
char buf[sector_size];
@ -86,13 +85,12 @@ void nn_drive_readByte(nn_drive *drive, void *_, nn_component *component, nn_com
nn_return(computer, nn_values_integer(buf[sector_offset]));
}
void nn_drive_writeByte(nn_drive *drive, void *_, nn_component *component, nn_computer *computer) {
// TODO: calculate the right index aaaaargh
nn_value offsetValue = nn_getArgument(computer, 0);
nn_value writeValue = nn_getArgument(computer, 1);
size_t disk_offset = nn_toInt(offsetValue);
size_t disk_offset = nn_toInt(offsetValue) - 1;
char write = nn_toInt(writeValue);
size_t sector_size = drive->getSectorSize(component, drive->userdata);
int sector = disk_offset / sector_size;
int sector = (disk_offset / sector_size) + 1;
size_t sector_offset = disk_offset % sector_size;
char buf[sector_size];