From 37a7574f1f3613d8746005e8e90abb8db9eab437 Mon Sep 17 00:00:00 2001
From: Dean Netherton <dinoboards@netherton.org>
Date: Tue, 16 Jul 2024 17:02:53 +1000
Subject: [PATCH] ez80: report if RTC is not powered

---
 Source/HBIOS/ez80rtc.asm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Source/HBIOS/ez80rtc.asm b/Source/HBIOS/ez80rtc.asm
index 7909b4a8..1adaac44 100644
--- a/Source/HBIOS/ez80rtc.asm
+++ b/Source/HBIOS/ez80rtc.asm
@@ -25,8 +25,14 @@ EZ80RTC_INIT:
 	LD	A, 1			; RTC FIRMWARE FUNCTION GROUP
 	LD	B, 0			; RTC INIT FUNCTION
 	EZ80_FN	
-	; TODO VERIFY SUCCESS -> A IS ZERO
+	JR	Z, RTC_POWERED
 
+	PUSH	AF
+	PRTS("NOT POWERED$")
+	POP	AF
+	RET
+
+RTC_POWERED:
 	; DISPLAY CURRENT TIME
 	LD	HL, EZ80RTC_BCDBUF_EXT	; POINT TO BCD BUF EXTENDED
 	LD	A, 1			; RTC FIRMWARE FUNCTION GROUP