From 28a2336aae0dc4e9eb43c5c2a2846292667784e8 Mon Sep 17 00:00:00 2001
From: TomW <TomW@localhost>
Date: Sun, 3 May 2015 14:42:34 +0100
Subject: [PATCH] MOV DRx now loads/stores from 'dummy' DRx registers (BeOS).

---
 src/ibm.h              | 1 +
 src/x86_ops_mov_ctrl.h | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/ibm.h b/src/ibm.h
index 26aed41..a167c53 100644
--- a/src/ibm.h
+++ b/src/ibm.h
@@ -155,6 +155,7 @@ union
 #define msw CR0.w
 
 uint32_t cr2, cr3, cr4;
+uint32_t dr[8];
 
 #define C_FLAG  0x0001
 #define P_FLAG  0x0004
diff --git a/src/x86_ops_mov_ctrl.h b/src/x86_ops_mov_ctrl.h
index 9213080..b276e80 100644
--- a/src/x86_ops_mov_ctrl.h
+++ b/src/x86_ops_mov_ctrl.h
@@ -80,7 +80,7 @@ static int opMOV_r_DRx_a16(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_16(fetchdat);
-        regs[rm].l = 0;
+        regs[rm].l = dr[reg];
         CLOCK_CYCLES(6);
         return 0;
 }
@@ -93,7 +93,7 @@ static int opMOV_r_DRx_a32(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_32(fetchdat);
-        regs[rm].l = 0;
+        regs[rm].l = dr[reg];
         CLOCK_CYCLES(6);
         return 0;
 }
@@ -188,6 +188,7 @@ static int opMOV_DRx_r_a16(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_16(fetchdat);
+        dr[reg] = regs[rm].l;
         CLOCK_CYCLES(6);
         return 0;
 }
@@ -200,6 +201,7 @@ static int opMOV_DRx_r_a32(uint32_t fetchdat)
                 return 1;
         }
         fetch_ea_16(fetchdat);
+        dr[reg] = regs[rm].l;
         CLOCK_CYCLES(6);
         return 0;
 }