Deaicup/Deshab-OS
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This commit is contained in:
xyou
2026-07-28 14:35:14 +08:00
parent 17a577f2ed
commit 537890df9e
44 changed files with 4903 additions and 404 deletions
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CODE/dsk/main.c
+3 -11
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@@ -207,7 +207,7 @@ static int fat32_find_entry(const u8 *clus, u32 clus_sectors, const char *target
if (dir[e].attr==0x0F) continue;
if (dir[e].attr & 0x08) continue;
if (neq11(dir[e].name, target)) {
*out_clus = r16((const u8*)&dir[e].clow);
*out_clus = r16((const u8*)&dir[e].clow) | ((u32)r16((const u8*)&dir[e].chigh) << 16);
*out_size = dir[e].fsize;
return 0;
}
@@ -436,10 +436,9 @@ static int fat32_write_root_file(const char *name11, const u8 *data, u32 size) {
e->ntr = 0; e->ctenth = 0; e->ctime = 0; e->cdate = 0;
e->adate = 0; e->chigh = (u16)((first_clus >> 16) & 0xFFFF);
e->wtime = 0; e->wdate = 0; e->clow = (u16)(first_clus & 0xFFFF);
e->fsize = size;
} else {
dir[free_entry >= 0 ? (u32)free_entry : 0].chigh = (u16)((first_clus >> 16) & 0xFFFF);
dir[free_entry >= 0 ? (u32)free_entry : 0].clow = (u16)(first_clus & 0xFFFF);
/* Find the existing entry again to update it */
/* 文件已存在：只更新匹配到的条目（不触碰 free_entry！） */
for (u32 e2 = 0; e2 < max_entries; e2++) {
if (neq11(dir[e2].name, name11)) {
dir[e2].chigh = (u16)((first_clus >> 16) & 0xFFFF);
@@ -449,13 +448,6 @@ static int fat32_write_root_file(const char *name11, const u8 *data, u32 size) {
}
}
}
/* Set file size in the directory entry */
for (u32 e2 = 0; e2 < max_entries; e2++) {
if (neq11(dir[e2].name, name11)) {
dir[e2].fsize = size;
break;
}
}
/* 6. Write FAT + root directory + data sectors back to disk */
/* Write FAT (both copies) */