diff --git a/game_compatibility.md b/game_compatibility.md
index b1665e3..a0a0135 100644
--- a/game_compatibility.md
+++ b/game_compatibility.md
@@ -76,7 +76,7 @@ Game Compatibility
 | マスカレイド                                | Supported   | From アリスCD |
 | キャロル ～聖なる鐘が響く夜～               | Supported   | From アリスCD, Online match is not supported |
 | できるかなー？                              | Supported   | From アリスCD |
-| Child Assassin                              | Supported   | From アリスCD |
+| Child Assassin                              | Unsupported | From アリスCD |
 | Klavier                                     | Supported   | From アリスCD |
 | 弱肉狂食                                    | Supported   | From アリスCD |
 | 眼鏡大戦２                                  | Supported   | From アリスCD |
diff --git a/src/dri.c b/src/dri.c
index c9ce490..e25fe29 100644
--- a/src/dri.c
+++ b/src/dri.c
@@ -30,50 +30,48 @@
 #include "LittleEndian.h"
 #include "dri.h"
 
-static bool read_index(int disk, drifiles *d, FILE *fp) {
+static bool read_index(int volume, drifiles *d, FILE *fp) {
 	fseek(fp, 0L, SEEK_END);
 	int filesize = ftell(fp);
 
-	// Get ptrsize and mapsize
+	// Get the size of offsets table and link table.
 	uint8_t hdr[6];
 	fseek(fp, 0L, SEEK_SET);
 	if (fread(hdr, 6, 1, fp) != 1)
 		return false;
-	int ptrsize = LittleEndian_get3B(hdr, 0) << 8;
-	int mapsize = (LittleEndian_get3B(hdr, 3) << 8) - ptrsize;
-	if (ptrsize <= 0 || mapsize <= 0 || ptrsize + mapsize > filesize)
+	int ofssize = LittleEndian_get3B(hdr, 0) << 8;
+	int linksize = (LittleEndian_get3B(hdr, 3) << 8) - ofssize;
+	if (ofssize <= 0 || linksize <= 0 || ofssize + linksize > filesize)
 		return false;
 
-	// Read the pointer table and the link table
-	uint8_t *ptbl = malloc(ptrsize + mapsize);
-	memcpy(ptbl, hdr, 6);
-	if (fread(ptbl + 6, ptrsize + mapsize - 6, 1, fp) != 1) {
-		free(ptbl);
+	// Read the link table. In System 3.9, only the first volume's link table is
+	// valid. It's different in System 3.8 and earlier, and games that depend
+	// on the old behavior (e.g. Child Assassin in Alice CD 2.50) won't work.
+	if (!d->link) {
+		d->nr_files = linksize / 3;
+		d->link = calloc(1, linksize);
+		d->offset = calloc(sizeof(uint32_t), d->nr_files);
+		fseek(fp, ofssize, SEEK_SET);
+		if (fread(d->link, linksize, 1, fp) != 1)
+			return false;
+	}
+
+	// Read the offsets table.
+	uint8_t *otbl = malloc(ofssize);
+	fseek(fp, 0L, SEEK_SET);
+	if (fread(otbl, ofssize, 1, fp) != 1) {
+		free(otbl);
 		return false;
 	}
-	uint8_t *ltbl = ptbl + ptrsize;
-
-	// (Re)allocate the index buffers
-	int nr_files = mapsize / 3;
-	if (d->nr_files < nr_files) {
-		d->disk = realloc(d->disk, nr_files);
-		d->offset = realloc(d->offset, sizeof(uint32_t) * nr_files);
-		memset(d->disk + d->nr_files, 0, nr_files - d->nr_files);
-		memset(d->offset + d->nr_files, 0, sizeof(uint32_t) * (nr_files - d->nr_files));
-		d->nr_files = nr_files;
-	}
-
-	// Parse the index
-	for (int i = 0; i < nr_files; i++) {
-		if (disk != ltbl[i * 3] - 1)
+	for (int i = 0; i < d->nr_files; i++) {
+		if (d->link[i * 3] != volume)
 			continue;
 		if (d->maxno < i)
 			d->maxno = i;
-		d->disk[i] = ltbl[i * 3];
-		int ptr = LittleEndian_getW(ltbl, i * 3 + 1);
-		d->offset[i] = LittleEndian_get3B(ptbl, ptr * 3) << 8;
+		int offset_index = LittleEndian_getW(d->link, i * 3 + 1);
+		d->offset[i] = LittleEndian_get3B(otbl, offset_index * 3) << 8;
 	}
-	free(ptbl);
+	free(otbl);
 	return true;
 }
 
@@ -90,7 +88,7 @@ drifiles *dri_init(const char **file, int cnt, boolean use_mmap) {
 		FILE *fp = fopen(file[i], "rb");
 		if (!fp)
 			SYSERROR("%s: %s", file[i], strerror(errno));
-		if (!read_index(i, d, fp)) {
+		if (!read_index(i + 1, d, fp)) {
 			// Only errors in *A.ALD are fatal, because some games have
 			// dummy (invalid) *[B-Z].ALD files.
 			if (i == 0)
@@ -117,18 +115,18 @@ drifiles *dri_init(const char **file, int cnt, boolean use_mmap) {
 }
 
 dridata *dri_getdata(drifiles *d, int no) {
-	if (no < 0 || no >= d->nr_files || !d->disk[no] || !d->offset[no])
+	if (no < 0 || no >= d->nr_files || !d->link[no * 3] || !d->offset[no])
 		return NULL;
-	int disk = d->disk[no] - 1;
+	int volume = d->link[no * 3];
 
 	uint8_t *data;
 	int ptr, size;
 	if (d->mmapped) {
-		data = d->mmap[disk]->addr + d->offset[no];
+		data = d->mmap[volume - 1]->addr + d->offset[no];
 		ptr  = LittleEndian_getDW(data, 0);
 		size = LittleEndian_getDW(data, 4);
 	} else {
-		FILE *fp = fopen(d->fnames[disk], "rb");
+		FILE *fp = fopen(d->fnames[volume - 1], "rb");
 		if (!fp)
 			return NULL;
 		uint8_t entry_header[8];
diff --git a/src/dri.h b/src/dri.h
index 2ac6d4c..7c4304f 100644
--- a/src/dri.h
+++ b/src/dri.h
@@ -35,7 +35,7 @@ struct _drifiles {
 	char     *fnames[DRIFILEMAX];
 	int      nr_files; // upper limit on how many files could be referenced by this archive
 	int      maxno;
-	uint8_t  *disk;    // file numbers
+	uint8_t  *link;    // link table
 	uint32_t *offset;  // offsets in file
 };
 typedef struct _drifiles drifiles;