From f08dd8329744f978f383aee8a40b9e817d16dfd4 Mon Sep 17 00:00:00 2001
From: Serge Vakulenko <serge.vakulenko@gmail.com>
Date: Mon, 12 Aug 2019 00:14:56 -0700
Subject: [PATCH] Make DM-1801 images compatible with native CPS.

---
 dm1801.c |  4 ++--
 radio.c  | 14 +++-----------
 2 files changed, 5 insertions(+), 13 deletions(-)

diff --git a/dm1801.c b/dm1801.c
index 3ee53f0..d5cee22 100644
--- a/dm1801.c
+++ b/dm1801.c
@@ -380,7 +380,7 @@ static void dm1801_download(radio_device_t *radio)
     download(radio);
 
     // Add header.
-    memcpy(&radio_mem[0], "MD-760P", 7);
+    memcpy(&radio_mem[0], "1801", 4);
 }
 
 //
@@ -412,7 +412,7 @@ static void dm1801_upload(radio_device_t *radio, int cont_flag)
 //
 static int dm1801_is_compatible(radio_device_t *radio)
 {
-    return strncmp("MD-760P", (char*)&radio_mem[0], 7) == 0;
+    return strncmp("1801", (char*)&radio_mem[0], 4) == 0;
 }
 
 //
diff --git a/radio.c b/radio.c
index 76be167..55664ec 100644
--- a/radio.c
+++ b/radio.c
@@ -231,17 +231,9 @@ void radio_read_image(const char *filename)
         if (memcmp(ident, "BF-5R", 5) == 0) {
             device = &radio_rd5r;
         } else if (memcmp(ident, "MD-760P", 7) == 0) {
-            // Both GD-77 and DM-1801 have the same header.
-            fseek(img, 0x90, SEEK_SET);
-            if (fread(ident, 1, 8, img) != 8) {
-                fprintf(stderr, "%s: Cannot read radio ID.\n", filename);
-                exit(-1);
-            }
-            if (memcmp(ident, "BF-1801", 7) == 0) {
-                device = &radio_dm1801;
-            } else {
-                device = &radio_gd77;
-            }
+            device = &radio_gd77;
+        } else if (memcmp(ident, "1801", 4) == 0) {
+            device = &radio_dm1801;
         } else if (memcmp(ident, "MD-760", 6) == 0) {
             fprintf(stderr, "Old Radioddity GD-77 v2.6 image not supported!\n");
             exit(-1);