From 155bdd259eb8909c579a1f28539ff15129ba00fd Mon Sep 17 00:00:00 2001
From: Michael Pavone <pavone@retrodev.com>
Date: Mon, 9 Oct 2017 07:42:33 -0700
Subject: Added detection of XBAND test ROMs. None seem to actually work with
 my limited FRED chip implementation though

---
 xband.c | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

(limited to 'xband.c')

diff --git a/xband.c b/xband.c
index 1a72839..f4a85ad 100644
--- a/xband.c
+++ b/xband.c
@@ -83,6 +83,23 @@ enum {
 
 uint8_t xband_detect(uint8_t *rom, uint32_t rom_size)
 {
+	if (rom_size < 0x200) {
+		return 0;
+	} 
+	
+	//product ID is all NULL
+	for (int i = GAME_ID_OFF; i <= (GAME_ID_OFF + GAME_ID_LEN); i++)
+	{
+		if (rom[i]) {
+			return 0;
+		}
+	}
+	
+	if (!memcmp(rom+8, "DAVE", 4)) {
+		//XBAND test roms
+		return 1;
+	}
+	
 	//Internal ROM is 512KB, accept larger ones for overdumps and custom firmware
 	if (rom_size < (512*1024)) {
 		return 0;
@@ -93,13 +110,7 @@ uint8_t xband_detect(uint8_t *rom, uint32_t rom_size)
 		return 0;
 	}
 	
-	//product ID is all NULL
-	for (int i = GAME_ID_OFF; i <= (GAME_ID_OFF + GAME_ID_LEN); i++)
-	{
-		if (rom[i]) {
-			return 0;
-		}
-	}
+	
 	return 1;
 }
 
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