diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 56168157..3867282b 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -2349,7 +2349,7 @@ HB_CPU1:
   #ENDIF
 ;
 	; ANNOUNCE OURSELVES ON DSKY
-	LD	HL,MSG_HBVER +  5
+	LD	HL,MSG_HBVER + 5
 	LD	A,(DSKY_HEXMAP + RMJ)
 	OR	$80
 	LD	(HL),A
diff --git a/Source/HBIOS/lcd.asm b/Source/HBIOS/lcd.asm
index 90e9ec3b..3373c304 100644
--- a/Source/HBIOS/lcd.asm
+++ b/Source/HBIOS/lcd.asm
@@ -382,11 +382,11 @@ LCD_CPU		.DW	LCD_CPU_Z80
 		.DW	LCD_CPU_Z180K
 		.DW	LCD_CPU_Z180N
 		.DW	LCD_CPU_Z280
+		.DW	LCD_CPU_EZ80
 ;
 LCD_CPU_Z80	.DB	"Z80",0
 LCD_CPU_Z180	.DB	"Z180",0
 LCD_CPU_Z180K	.DB	"Z180-K",0
 LCD_CPU_Z180N	.DB	"Z180-N",0
 LCD_CPU_Z280	.DB	"Z280",0
-
-
+LCD_CPU_EZ80	.DB	"EZ80",0
diff --git a/Tools/unix/uz80as/uz80as.c b/Tools/unix/uz80as/uz80as.c
index 35c13ac0..eea8715e 100644
--- a/Tools/unix/uz80as/uz80as.c
+++ b/Tools/unix/uz80as/uz80as.c
@@ -923,7 +923,7 @@ static int checksum(int a, int b)
 
 	n = 0;
 	while (a < b)
-		n += s_mem[a++];
+		n ^= s_mem[a++];
 
 	return n;
 }