diff --git a/99-dmr.rules b/99-dmr.rules
index 9323998..f9f7b6d 100644
--- a/99-dmr.rules
+++ b/99-dmr.rules
@@ -12,5 +12,5 @@ SUBSYSTEM=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", MODE="666"
 SUBSYSTEM=="usb", ATTRS{idVendor}=="15a2", ATTRS{idProduct}=="0073", MODE="666"
 
 # Anytone AT-D868UV
-#TODO: Ignore this device in Modem Manager
-# ATTRS{idVendor}=="2a03", ENV{ID_MM_DEVICE_IGNORE}="1"'
+# Ignore this device in Modem Manager
+ATTRS{idVendor}=="28e9" ATTRS{idProduct}=="018a", ENV{ID_MM_DEVICE_IGNORE}="1"
diff --git a/d868uv-map.h b/d868uv-map.h
index db7fe29..7d7a97b 100644
--- a/d868uv-map.h
+++ b/d868uv-map.h
@@ -34,7 +34,7 @@
 { 0x00f40000, 0x2000 },     // Channels 3713-3840
 { 0x00f80000, 0x2000 },     // Channels 3841-3968
 { 0x00fc0000, 0x0880 },     // Channels 3969-4000, VFO A, VFO B
-{ 0x01000000, 0x1f400 },    // Channel bitmaps?
+{ 0x01000000, 0x1f400 },    // Unknown bitmap
 { 0x01080000, 0xc0 },       // Scanlist 1
 { 0x01080200, 0xc0 },       // Scanlist 2
 { 0x01080400, 0xc0 },       // Scanlist 3
@@ -309,7 +309,7 @@
 { 0x024c1280, 0x40 },       // Unknown data
 { 0x024c1300, 0x80 },       // Unknown data
 { 0x024c1400, 0x80 },       // Unknown data
-{ 0x024c1500, 0x240 },      // Unknown data
+{ 0x024c1500, 0x240 },      // Channel bitmap
 { 0x024c1800, 0x500 },      // Zeroes?
 { 0x024c2000, 0x440 },      // Unknown data
 { 0x024c2600, 0x40 },       // Unknown data
diff --git a/d868uv.c b/d868uv.c
index 9e7fac5..cffe25f 100644
--- a/d868uv.c
+++ b/d868uv.c
@@ -34,6 +34,9 @@
 #include "radio.h"
 #include "util.h"
 
+//
+// Sizes of configuration tables.
+//
 #define NCHAN           4000
 #define NCONTACTS       10000
 #define NZONES          250
@@ -41,6 +44,12 @@
 #define NSCANL          250
 #define NMESSAGES       100
 
+//
+// Offsets in the image file.
+//
+#define OFFSET_BANK1        0x000040
+#define OFFSET_CHAN_BITMAP  0x070a40
+
 //
 // Size of memory image.
 // Essentialy a sum of all fragments defined ind868um-map.h.
@@ -62,6 +71,15 @@ static fragment_t region_map[] = {
 #include "d868uv-map.h"
 };
 
+//
+// Channel data.
+//
+typedef struct {
+    // Bytes 0-63
+    uint8_t data[64];
+
+} channel_t;
+
 //
 // Print a generic information about the device.
 //
@@ -208,6 +226,28 @@ static void d868uv_save_image(radio_device_t *radio, FILE *img)
     fwrite(&radio_mem[0], 1, MEMSZ, img);
 }
 
+//
+// Get channel bank by index.
+//
+static channel_t *get_bank(int i)
+{
+    return (channel_t*) &radio_mem[OFFSET_BANK1 + i*0x2000];
+}
+
+//
+// Get channel by index.
+//
+/*static*/ channel_t *get_channel(int i)
+{
+    channel_t *bank   = get_bank(i >> 7);
+    uint8_t   *bitmap = &radio_mem[OFFSET_CHAN_BITMAP];
+
+    if ((bitmap[i / 8] >> (i & 7)) & 1)
+        return &bank[i % 128];
+    else
+        return 0;
+}
+
 //
 // Parse the scalar parameter.
 //
diff --git a/todo-id.diff b/todo-id.diff
new file mode 100644
index 0000000..e54af01
--- /dev/null
+++ b/todo-id.diff
@@ -0,0 +1,35 @@
+--- new1.hd	2018-10-15 23:22:12.911010924 -0700
++++ new1-id.hd	2018-10-16 00:05:47.408028203 -0700
+@@ -18103,7 +18103,7 @@
+ 000715c0  01 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+ 000715d0  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+ *
+-00071600  01 01 00 00 04 00 00 00  04 01 01 01 00 0f 01 02  |................|
++00071600  01 01 00 00 04 00 01 00  04 01 01 01 00 0f 01 02  |................|
+                             ^^
+
+ 00071610  01 12 0c 13 08 01 01 01  02 05 05 05 05 00 01 00  |................|
+ 00071620  00 00 00 00 00 00 04 01  00 01 01 00 00 01 02 01  |................|
+ 00071630  14 00 01 01 00 00 00 02  01 01 01 08 00 00 00 00  |................|
+@@ -18122,8 +18122,8 @@
+ *
+ 00071b00  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+ *
+-00071c00  57 45 4c 43 4f 4d 00 00  00 00 00 00 00 00 00 00  |WELCOM..........|
+-00071c10  41 4e 59 54 4f 4e 45 00  00 00 00 00 00 00 00 00  |ANYTONE.........|
++00071c00  4b 4b 36 41 42 51 20 41  42 43 44 45 46 47 00 00  |KK6ABQ ABCDEFG..|
++00071c10  53 45 52 47 45 59 20 4b  4c 4d 4e 4f 50 51 00 00  |SERGEY KLMNOPQ..|
+ 00071c20  31 32 33 34 35 36 37 38  00 00 00 00 00 00 00 00  |12345678........|
+ 00071c30  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+ 00071c40  00 00 00 17 00 00 00 71  00 00 00 00 a1 0f a1 0f  |.......q........|
+@@ -18139,8 +18139,8 @@
+ 00071dd0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
+ 00071de0  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+ *
+-00073d00  12 34 56 78 00 4d 79 20  52 61 64 69 6f 00 00 00  |.4Vx.My Radio...|
+-00073d10  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
++00073d00  03 11 45 42 00 4b 4b 36  41 42 51 61 62 63 64 65  |..EB.KK6ABQabcde|
++00073d10  66 67 68 69 6a 00 00 00  00 00 00 00 00 00 00 00  |fghij...........|
+ 00073d20  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+ *
+ 00075c40  00 ff 00 ff 00 ff 00 ff  00 00 00 00 00 00 00 00  |................|