From f33863126c21250708142a2440a28448e4f7dc18 Mon Sep 17 00:00:00 2001
From: Asnivor <coding@asnitech.co.uk>
Date: Fri, 8 Jun 2018 09:36:32 +0100
Subject: [PATCH] ZXHawk: Fix rendertable generation offset. btime.tap test now
 passes

---
 .../Computers/SinclairSpectrum/Machine/ULA.cs                 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
index 0bec3a194c..398c0c958f 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/Machine/ULA.cs
@@ -327,7 +327,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
 
                 for (var t = 0; t < _ula.FrameCycleLength; t++)
                 {
-                    var tStateScreen = t + _ula.InterruptStartTime;
+                    var tStateScreen = t + 1 + _ula.InterruptStartTime;
 
                     if (tStateScreen < 0)
                         tStateScreen += _ula.FrameCycleLength;
@@ -719,7 +719,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
         /// <returns></returns>
         public void ReadFloatingBus(int tstate, ref int result)
         {
-            int off = 1;
+            int off = 0;
             tstate += off;
             if (tstate >= RenderingTable.Renderer.Length)
                 tstate -= RenderingTable.Renderer.Length;