diff --git a/src/mame/drivers/backfire.c b/src/mame/drivers/backfire.c
index f080f7a5845..e8ad1c307ff 100644
--- a/src/mame/drivers/backfire.c
+++ b/src/mame/drivers/backfire.c
@@ -227,23 +227,23 @@ static VIDEO_UPDATE(backfire)
 static READ32_HANDLER(backfire_eeprom_r)
 {
 	/* some kind of screen indicator?  checked by backfira set before it will boot */
-	int backfire_screen = mame_rand(space->machine)&1;
-	return ((eeprom_read_bit()<<24) | input_port_read(space->machine, "IN0")
-			| ((input_port_read(space->machine, "IN2") & ~0x40) <<16)
-			| ((input_port_read(space->machine, "IN3") &  0x40) <<16)) ^  (backfire_screen << 26) ;
+	int backfire_screen = mame_rand(space->machine) & 1;
+	return ((eeprom_read_bit() << 24) | input_port_read(space->machine, "IN0")
+			| ((input_port_read(space->machine, "IN2") & 0xbf) << 16)
+			| ((input_port_read(space->machine, "IN3") & 0x40) << 16)) ^ (backfire_screen << 26) ;
 }
 
 static READ32_HANDLER(backfire_control2_r)
 {
-//  logerror("%08x:Read eprom %08x (%08x)\n",cpu_get_pc(space->cpu),offset<<1,mem_mask);
-	return (eeprom_read_bit()<<24) | input_port_read(space->machine, "IN1") | (input_port_read(space->machine, "IN1")<<16);
+//  logerror("%08x:Read eprom %08x (%08x)\n", cpu_get_pc(space->cpu), offset << 1, mem_mask);
+	return (eeprom_read_bit() << 24) | input_port_read(space->machine, "IN1") | (input_port_read(space->machine, "IN1") << 16);
 }
 
 #ifdef UNUSED_FUNCTION
 static READ32_HANDLER(backfire_control3_r)
 {
-//  logerror("%08x:Read eprom %08x (%08x)\n",cpu_get_pc(space->cpu),offset<<1,mem_mask);
-	return (eeprom_read_bit()<<24) | input_port_read(space->machine, "IN2") | (input_port_read(space->machine, "IN2")<<16);
+//  logerror("%08x:Read eprom %08x (%08x)\n", cpu_get_pc(space->cpu), offset << 1, mem_mask);
+	return (eeprom_read_bit() << 24) | input_port_read(space->machine, "IN2") | (input_port_read(space->machine, "IN2") << 16);
 }
 #endif