From f1b4dea990469a33e79d84557fc5c19b9e89a580 Mon Sep 17 00:00:00 2001
From: Nick Westgate <nick.westgate@gmail.com>
Date: Fri, 4 Aug 2017 21:54:18 +1200
Subject: [PATCH] Return ProDOS errors from Harddisk emulation. Fixes #452

Replace Basic System error codes with ProDOS ones.
---
 source/Harddisk.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/source/Harddisk.cpp b/source/Harddisk.cpp
index 37938a81..f17af3cd 100644
--- a/source/Harddisk.cpp
+++ b/source/Harddisk.cpp
@@ -448,8 +448,8 @@ bool HD_IsDriveUnplugged(const int iDrive)
 //-----------------------------------------------------------------------------
 
 #define DEVICE_OK				0x00
-#define DEVICE_UNKNOWN_ERROR	0x03
-#define DEVICE_IO_ERROR			0x08
+#define DEVICE_UNKNOWN_ERROR	0x28
+#define DEVICE_IO_ERROR			0x27
 
 static BYTE __stdcall HD_IO_EMUL(WORD pc, WORD addr, BYTE bWrite, BYTE d, ULONG nCyclesLeft)
 {