From ec2511fd991482ab4036cf656c5873b56afc6568 Mon Sep 17 00:00:00 2001
From: gbeauche <>
Date: Tue, 6 Apr 2004 19:47:56 +0000
Subject: [PATCH] Load XPRAM default values if signature not found. i.e. don't
 hang on first boot.

---
 SheepShaver/src/Unix/main_unix.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/SheepShaver/src/Unix/main_unix.cpp b/SheepShaver/src/Unix/main_unix.cpp
index 9aef379b..93face44 100644
--- a/SheepShaver/src/Unix/main_unix.cpp
+++ b/SheepShaver/src/Unix/main_unix.cpp
@@ -638,6 +638,36 @@ int main(int argc, char **argv)
 	// Load NVRAM
 	XPRAMInit();
 
+	// Load XPRAM default values if signature not found
+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
+	 || XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
+		D(bug("Loading XPRAM default values\n"));
+		memset(XPRAM + 0x1300, 0, 0x100);
+		XPRAM[0x130c] = 0x4e;	// "NuMc" signature
+		XPRAM[0x130d] = 0x75;
+		XPRAM[0x130e] = 0x4d;
+		XPRAM[0x130f] = 0x63;
+		XPRAM[0x1301] = 0x80;	// InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
+		XPRAM[0x1310] = 0xa8;	// Standard PRAM values
+		XPRAM[0x1311] = 0x00;
+		XPRAM[0x1312] = 0x00;
+		XPRAM[0x1313] = 0x22;
+		XPRAM[0x1314] = 0xcc;
+		XPRAM[0x1315] = 0x0a;
+		XPRAM[0x1316] = 0xcc;
+		XPRAM[0x1317] = 0x0a;
+		XPRAM[0x131c] = 0x00;
+		XPRAM[0x131d] = 0x02;
+		XPRAM[0x131e] = 0x63;
+		XPRAM[0x131f] = 0x00;
+		XPRAM[0x1308] = 0x13;
+		XPRAM[0x1309] = 0x88;
+		XPRAM[0x130a] = 0x00;
+		XPRAM[0x130b] = 0xcc;
+		XPRAM[0x1376] = 0x00;	// OSDefault = MacOS
+		XPRAM[0x1377] = 0x01;
+	}
+
 	// Set boot volume
 	i16 = PrefsFindInt32("bootdrive");
 	XPRAM[0x1378] = i16 >> 8;