diff --git a/hw/kdrive/mach64/mach64.c b/hw/kdrive/mach64/mach64.c
index 06818f8f2..a036f3e1d 100644
--- a/hw/kdrive/mach64/mach64.c
+++ b/hw/kdrive/mach64/mach64.c
@@ -70,7 +70,7 @@ mach64ScreenInit (KdScreenInfo *screen)
 	screen->dumb = TRUE;
     if (mach64s->vesa.mapping != VESA_LINEAR)
 	screen->dumb = TRUE;
-    mach64s->screen = mach64s->vesa.fb;
+    screen->memory_base = mach64s->vesa.fb;
     switch (screen->fb[0].depth) {
     case 8:
 	mach64s->colorKey = 0xff;
diff --git a/hw/kdrive/mach64/mach64.h b/hw/kdrive/mach64/mach64.h
index b28ac9b0d..38ddb9ae9 100644
--- a/hw/kdrive/mach64/mach64.h
+++ b/hw/kdrive/mach64/mach64.h
@@ -560,7 +560,6 @@ Bool mach64InitVideo(ScreenPtr pScreen);
 
 typedef struct _mach64ScreenInfo {
     VesaScreenPrivRec		vesa;
-    CARD8			*screen;
     CARD32			DP_PIX_WIDTH;
     CARD32			DP_SET_GUI_ENGINE;
     Bool			bpp24;
diff --git a/hw/kdrive/mach64/mach64draw.c b/hw/kdrive/mach64/mach64draw.c
index 13c4a12ea..aa065c5a8 100644
--- a/hw/kdrive/mach64/mach64draw.c
+++ b/hw/kdrive/mach64/mach64draw.c
@@ -116,7 +116,7 @@ mach64Setup (PixmapPtr pDst, PixmapPtr pSrc, CARD32 combo, int wait)
     if (triple)
 	DST_PITCH *= 3;
     /* bytes / 8 */
-    DST_OFFSET = ((CARD8 *) pDst->devPrivate.ptr - mach64s->screen) >> 3;
+    DST_OFFSET = ((CARD8 *) pDst->devPrivate.ptr - pScreenPriv->screen->memory_base) >> 3;
     
     mach64WaitAvail(reg, wait + (pSrc ? 5 : 4));
     reg->DP_SET_GUI_ENGINE = mach64s->DP_SET_GUI_ENGINE | (combo << 20);
@@ -131,7 +131,7 @@ mach64Setup (PixmapPtr pDst, PixmapPtr pSrc, CARD32 combo, int wait)
 	if (triple)
 	    SRC_PITCH *= 3;
 	/* bytes / 8 */
-	SRC_OFFSET = ((CARD8 *) pSrc->devPrivate.ptr - mach64s->screen) >> 3;
+	SRC_OFFSET = ((CARD8 *) pSrc->devPrivate.ptr - pScreenPriv->screen->memory_base) >> 3;
 	
 	reg->SRC_OFF_PITCH = ((SRC_OFFSET << 0) |
 			      (SRC_PITCH << 22) |
diff --git a/hw/kdrive/mga/mga.c b/hw/kdrive/mga/mga.c
index 05994dae8..2c3a4831d 100644
--- a/hw/kdrive/mga/mga.c
+++ b/hw/kdrive/mga/mga.c
@@ -74,8 +74,8 @@ mgaScreenInit (KdScreenInfo *screen)
 	screen->dumb = TRUE;
 
     fprintf (stderr, "vesa mapping is %d\n", mgas->vesa.mapping);
-#endif    
-    mgas->screen = mgas->vesa.fb;
+#endif
+    screen->memory_base = mgas->vesa.fb;
 
     memory = mgas->vesa.fb_size;
     screen_size = screen->fb[0].byteStride * screen->height;
diff --git a/hw/kdrive/mga/mga.h b/hw/kdrive/mga/mga.h
index 8a4eb9f08..ff9716d85 100644
--- a/hw/kdrive/mga/mga.h
+++ b/hw/kdrive/mga/mga.h
@@ -96,7 +96,6 @@ typedef struct _mgaCardInfo {
 
 typedef struct _mgaScreenInfo {
     VesaScreenPrivRec vesa;
-    CARD8 *screen;
 
     int pitch;
     int pw;
diff --git a/hw/kdrive/mga/mgadraw.c b/hw/kdrive/mga/mgadraw.c
index 29678db6c..b41c5c16a 100644
--- a/hw/kdrive/mga/mgadraw.c
+++ b/hw/kdrive/mga/mgadraw.c
@@ -102,7 +102,7 @@ mgaPrepareSolid (PixmapPtr pPixmap, int alu, Pixel pm, Pixel fg)
     cmd = MGA_OPCOD_TRAP | MGA_DWGCTL_SOLID | MGA_DWGCTL_ARZERO | MGA_DWGCTL_SGNZERO |
 	MGA_DWGCTL_SHIFTZERO | mgaRop[alu];
 
-    dst_org = (int)pPixmap->devPrivate.ptr - (int)mgas->screen;
+    dst_org = (int)pPixmap->devPrivate.ptr - (int)pScreenPriv->screen->memory_base;
     
     mgaSetup (pPixmap->drawable.pScreen, 5);
 
@@ -152,8 +152,8 @@ mgaPrepareCopy (PixmapPtr pSrcPixmap, PixmapPtr pDstPixmap,
 
     mgaSetup (pSrcPixmap->drawable.pScreen, 7);
 
-    MGA_OUT32 (mmio, MGA_REG_SRCORG, ((int)pSrcPixmap->devPrivate.ptr - (int)mgas->screen));
-    MGA_OUT32 (mmio, MGA_REG_DSTORG, ((int)pDstPixmap->devPrivate.ptr - (int)mgas->screen));
+    MGA_OUT32 (mmio, MGA_REG_SRCORG, ((int)pSrcPixmap->devPrivate.ptr - (int)pScreenPriv->screen->memory_base));
+    MGA_OUT32 (mmio, MGA_REG_DSTORG, ((int)pDstPixmap->devPrivate.ptr - (int)pScreenPriv->screen->memory_base));
     MGA_OUT32 (mmio, MGA_REG_PITCH, pDstPixmap->devKind / (pDstPixmap->drawable.bitsPerPixel >> 3));
     src_pitch = pSrcPixmap->devKind / (pSrcPixmap->drawable.bitsPerPixel >> 3);
 	
diff --git a/hw/kdrive/src/kaa.c b/hw/kdrive/src/kaa.c
index e85cfe65d..139c9fcf1 100644
--- a/hw/kdrive/src/kaa.c
+++ b/hw/kdrive/src/kaa.c
@@ -135,11 +135,11 @@ kaaPixmapAllocArea (PixmapPtr pPixmap)
     ScreenPtr	pScreen = pPixmap->drawable.pScreen;
     KaaScreenPriv (pScreen);
     KaaPixmapPriv (pPixmap);
+    KdScreenPriv  (pScreen);
     int		bpp = pPixmap->drawable.bitsPerPixel;
     CARD16	h = pPixmap->drawable.height;
     CARD16	w = pPixmap->drawable.width;
     int		pitch = KaaPixmapPitch (w);
-    PixmapPtr	pScreenPixmap = (*pScreen->GetScreenPixmap)(pScreen);
     
     pKaaPixmap->devKind = pPixmap->devKind;
     pKaaPixmap->devPrivate = pPixmap->devPrivate;
@@ -157,7 +157,7 @@ kaaPixmapAllocArea (PixmapPtr pPixmap)
 		  pPixmap->drawable.width,
 		  pPixmap->drawable.height));
     pPixmap->devKind = pitch * (bpp >> 3);
-    pPixmap->devPrivate.ptr = (pointer) ((CARD8 *) pScreenPixmap->devPrivate.ptr + pKaaPixmap->area->offset);
+    pPixmap->devPrivate.ptr = (pointer) ((CARD8 *) pScreenPriv->screen->memory_base + pKaaPixmap->area->offset);
     pPixmap->drawable.serialNumber = NEXT_SERIAL_NUMBER;
     return TRUE;
 }
diff --git a/hw/kdrive/src/kdrive.h b/hw/kdrive/src/kdrive.h
index 71d58e009..df59bb972 100644
--- a/hw/kdrive/src/kdrive.h
+++ b/hw/kdrive/src/kdrive.h
@@ -118,6 +118,7 @@ typedef struct _KdScreenInfo {
     int		mynum;
     DDXPointRec	origin;
     KdFrameBuffer   fb[KD_MAX_FB];
+    CARD8	*memory_base;
     int         off_screen_base;
     int         off_screen_size;
     pointer     off_screen_areas;