From fa43e4b2036a7344c5da4ff8dc50057c165599f4 Mon Sep 17 00:00:00 2001
From: Jonathan Campbell <jonathan@castus.tv>
Date: Sat, 18 Jan 2014 16:56:36 -0800
Subject: [PATCH] move fixed global constants defining segments into dos.cpp
 and make them variables. We're going to allow for dynamic mapping later.

---
 include/dos_inc.h | 16 ++++++++++++++++
 src/dos/dos.cpp   | 12 ++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/include/dos_inc.h b/include/dos_inc.h
index 2050a1d85..57c2b98d2 100644
--- a/include/dos_inc.h
+++ b/include/dos_inc.h
@@ -108,6 +108,7 @@ extern Bitu DOS_FILES;
 #define DOS_DEVICES 10
 
 
+#if 0 /* ORIGINAL DEFINES FOR REFERENCE */
 // dos swappable area is 0x320 bytes beyond the sysvars table
 // device driver chain is inside sysvars
 #define DOS_INFOBLOCK_SEG 0x80	// sysvars (list of lists)
@@ -122,6 +123,21 @@ extern Bitu DOS_FILES;
 
 #define DOS_PRIVATE_SEGMENT 0xc800
 #define DOS_PRIVATE_SEGMENT_END 0xd000
+#endif
+
+// dos swappable area is 0x320 bytes beyond the sysvars table
+// device driver chain is inside sysvars
+extern Bit16u DOS_INFOBLOCK_SEG;// 0x80	// sysvars (list of lists)
+extern Bit16u DOS_CONDRV_SEG;// 0xa0
+extern Bit16u DOS_CONSTRING_SEG;// 0xa8
+extern Bit16u DOS_SDA_SEG;// 0xb2		// dos swappable area
+extern Bit16u DOS_SDA_OFS;// 0
+extern Bit16u DOS_CDS_SEG;// 0x108
+extern Bit16u DOS_FIRST_SHELL;// 0x118
+extern Bit16u DOS_MEM_START;// 0x158	 // regression to r3437 fixes nascar 2 colors
+
+extern Bit16u DOS_PRIVATE_SEGMENT;// 0xc800
+extern Bit16u DOS_PRIVATE_SEGMENT_END;// 0xd000
 
 /* internal Dos Tables */
 
diff --git a/src/dos/dos.cpp b/src/dos/dos.cpp
index 453ee917c..72eb159b7 100644
--- a/src/dos/dos.cpp
+++ b/src/dos/dos.cpp
@@ -32,6 +32,18 @@
 #include "serialport.h"
 #include "dos_network.h"
 
+Bit16u DOS_INFOBLOCK_SEG=0x80;	// sysvars (list of lists)
+Bit16u DOS_CONDRV_SEG=0xa0;
+Bit16u DOS_CONSTRING_SEG=0xa8;
+Bit16u DOS_SDA_SEG=0xb2;		// dos swappable area
+Bit16u DOS_SDA_OFS=0;
+Bit16u DOS_CDS_SEG=0x108;
+Bit16u DOS_FIRST_SHELL=0x118;
+Bit16u DOS_MEM_START=0x158;	 // regression to r3437 fixes nascar 2 colors
+
+Bit16u DOS_PRIVATE_SEGMENT=0xc800;
+Bit16u DOS_PRIVATE_SEGMENT_END=0xd000;
+
 DOS_Block dos;
 DOS_InfoBlock dos_infoblock;