From fcc394af9d845752413a808b403d17232aa0d191 Mon Sep 17 00:00:00 2001
From: jonnosan <jonnosan@93682198-c243-4bdb-bd91-e943c89aac3b>
Date: Tue, 25 Aug 2009 02:25:31 +0000
Subject: [PATCH] git-svn-id: http://svn.code.sf.net/p/netboot65/code@189
 93682198-c243-4bdb-bd91-e943c89aac3b

---
 client/drivers/c64timer_nb65.s | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/client/drivers/c64timer_nb65.s b/client/drivers/c64timer_nb65.s
index 5f721e9..36a6ceb 100644
--- a/client/drivers/c64timer_nb65.s
+++ b/client/drivers/c64timer_nb65.s
@@ -40,7 +40,13 @@ timer_read:
 ; outputs: none (all registers preserved, by carry flag can be modified)
 timer_vbl_handler:
   pha
-  lda #$11
+  lda $02A6   ;PAL/NTSC flag (0 = NTSC, 1 = PAL), 
+  beq @was_ntsc  
+  lda #$14  ;PAL = 50 HZ =~ 20 ms per 'tick'
+  bne :+
+@was_ntsc:  
+  lda #$11  ;NTSC = 60 HZ =~ 17 ms per 'tick' 
+: 
   adc current_time_value
   sta current_time_value
   bcc :+