diff -dru fbida-2.03/GNUmakefile fbida-2.03-4bpp/GNUmakefile
--- fbida-2.03/GNUmakefile	2004-06-30 06:41:54.000000000 -0700
+++ fbida-2.03-4bpp/GNUmakefile	2005-07-29 00:39:24.000000000 -0700
@@ -7,7 +7,7 @@
 resdir	=  $(DESTDIR)$(RESDIR)
 
 # fixup flags
-CFLAGS	+= -DVERSION='"$(VERSION)"' -I$(srcdir)
+CFLAGS	+= -DVERSION='"$(VERSION)"' -I$(srcdir) -mcpu=arm7tdmi -mtune=arm7tdmi
 
 # default target
 all: build
@@ -43,7 +43,7 @@
 HAVE_LIBSANE	:= $(call ac_lib,sane_init,sane)
 HAVE_LIBCURL	:= $(call ac_lib,curl_easy_init,curl)
 HAVE_LIBLIRC	:= $(call ac_lib,lirc_init,lirc_client)
-HAVE_MOTIF	:= $(call ac_lib,XmStringGenerate,Xm,-L/usr/X11R6/$(LIB) -lXpm -lXt -lXext -lX11)
+#HAVE_MOTIF	:= $(call ac_lib,XmStringGenerate,Xm,-L/usr/X11R6/$(LIB) -lXpm -lXt -lXext -lX11)
 endef
 
 # transparent http/ftp access using curl depends on fopencookie (glibc)
diff -dru fbida-2.03/dither.c fbida-2.03-4bpp/dither.c
--- fbida-2.03/dither.c	2004-03-28 03:32:06.000000000 -0800
+++ fbida-2.03-4bpp/dither.c	2005-07-29 00:40:33.000000000 -0700
@@ -191,3 +191,27 @@
 	*(dest++) = a & 0xff;
     }
 }
+
+void
+dither_line_gray_4bpp(unsigned char *src, unsigned char *dest, int y, int width)
+{
+    long           *ymod, xmod;
+    register long   a,g;
+    int x;
+
+    ymod = DM[y & DITHER_MASK];
+
+    for(x = 0; x < width; x++) {
+	xmod = width & DITHER_MASK;
+
+	g = (src[0] * 77 + src[1] * 151 + src[2] * 28) >> 8;
+	a = gray_dither[g];
+	src += 3;
+	if (ymod[xmod] < a)
+	    a >>= 8;
+        if(x % 2)
+            dest[x/2] |= (unsigned char)(a << 4);
+        else
+            dest[x/2] = (unsigned char)a;
+    }
+}
diff -dru fbida-2.03/dither.h fbida-2.03-4bpp/dither.h
--- fbida-2.03/dither.h	2004-03-28 03:32:06.000000000 -0800
+++ fbida-2.03-4bpp/dither.h	2005-07-28 18:12:29.000000000 -0700
@@ -4,3 +4,4 @@
 void init_dither(int, int, int, int);
 void dither_line_color(unsigned char *, unsigned char *, int, int);
 void dither_line_gray(unsigned char *, unsigned char *, int, int);
+void dither_line_gray_4bpp(unsigned char *, unsigned char *, int, int);
diff -dru fbida-2.03/fb-gui.c fbida-2.03-4bpp/fb-gui.c
--- fbida-2.03/fb-gui.c	2004-08-17 04:47:30.000000000 -0700
+++ fbida-2.03-4bpp/fb-gui.c	2005-07-29 00:20:21.000000000 -0700
@@ -72,6 +72,24 @@
     }
 }
 
+static void
+dither_palette_gray_4bpp(void)
+{
+    /* 
+     * I want to put to each color register it's own number.
+     * This is how register value is calculated:
+     * gray = (R * 77 + G * 151 + B * 28) >> 20;
+     * Assuming R == G == B, reverse formula will be:
+     * V = (gray << 20) / 256
+     */ 
+    
+    unsigned long gray;
+    for(gray = 0; gray < 16; gray++) {
+        p_red[gray] = p_green[gray] = p_blue[gray] = gray << 12;
+    }
+    p_cmap.len = 16;
+}
+
 static void shadow_lut_init_one(int32_t *lut, int bits, int shift)
 {
     int i;
@@ -130,6 +148,7 @@
     int x;
 
     switch (fb_var.bits_per_pixel) {
+    case 4:
     case 8:
 	dither_line(buffer, ptr, line, swidth);
 	break;
@@ -171,7 +190,7 @@
     for (i = 0; i < sheight; i++, offset += fb_fix.line_length) {
 	if (0 == sdirty[i])
 	    continue;
-	shadow_render_line(i, fb_mem + offset, shadow[i]);
+	shadow_render_line(i, fb_mem + fb_mem_offset + offset, shadow[i]);
 	sdirty[i] = 0;
     }
 }
@@ -201,7 +220,7 @@
 
 void shadow_set_palette(int fd)
 {
-    if (fb_fix.visual != FB_VISUAL_DIRECTCOLOR && fb_var.bits_per_pixel != 8)
+    if (fb_fix.visual != FB_VISUAL_DIRECTCOLOR && fb_fix.visual != FB_VISUAL_PSEUDOCOLOR)
 	return;
     if (-1 == ioctl(fd,FBIOPUTCMAP,&p_cmap)) {
 	perror("ioctl FBIOPUTCMAP");
@@ -250,6 +269,14 @@
             linear_palette(8,8,8);
 	shadow_lut_init(24);
 	break;
+    case 4:
+        /* work only with grayscale 4bpp */
+        if (fb_var.grayscale) {
+            dither_palette_gray_4bpp();
+            init_dither(2, 2, 2, 16);
+            dither_line = dither_line_gray_4bpp;
+            break;
+        }
     default:
 	fprintf(stderr, "Oops: %i bit/pixel ???\n",
 		fb_var.bits_per_pixel);
@@ -643,11 +670,11 @@
 void fb_clear_mem(void)
 {
     if (visible)
-	fb_memset(fb_mem,0,fb_fix.smem_len);
+	fb_memset(fb_mem + fb_mem_offset,0,fb_fix.smem_len);
 }
 
 void fb_clear_screen(void)
 {
     if (visible)
-	fb_memset(fb_mem,0,fb_fix.line_length * fb_var.yres);
+	fb_memset(fb_mem + fb_mem_offset,0,fb_fix.line_length * fb_var.yres);
 }
diff -dru fbida-2.03/fbtools.c fbida-2.03-4bpp/fbtools.c
--- fbida-2.03/fbtools.c	2004-11-08 05:09:20.000000000 -0800
+++ fbida-2.03-4bpp/fbtools.c	2005-07-28 23:36:13.000000000 -0700
@@ -51,6 +51,7 @@
 static struct fb_var_screeninfo  fb_ovar;
 static unsigned short            ored[256], ogreen[256], oblue[256];
 static struct fb_cmap            ocmap = { 0, 256, ored, ogreen, oblue };
+static unsigned char             *ofbcontent = NULL;
 
 /* -------------------------------------------------------------------- */
 /* devices                                                              */
@@ -369,7 +370,7 @@
 	perror("ioctl FBIOGET_FSCREENINFO");
 	exit(1);
     }
-    if (fb_ovar.bits_per_pixel == 8 ||
+    if (fb_fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 	fb_fix.visual == FB_VISUAL_DIRECTCOLOR) {
 	if (-1 == ioctl(fb,FBIOGETCMAP,&ocmap)) {
 	    perror("ioctl FBIOGETCMAP");
@@ -433,6 +434,12 @@
     }
 //    fprintf(stderr,"fb_mem = %p\n",fb_mem);
 
+    /* store old framebuffer */
+    ofbcontent = (unsigned char*)malloc(fb_fix.smem_len);
+    if (NULL != ofbcontent) {
+        memcpy(ofbcontent, fb_mem + fb_mem_offset, fb_fix.smem_len);
+    }
+    
     /* move viewport to upper left corner */
     if (fb_var.xoffset != 0 || fb_var.yoffset != 0) {
 	fb_var.xoffset = 0;
@@ -465,7 +472,12 @@
 	perror("ioctl FBIOPUT_VSCREENINFO");
     if (-1 == ioctl(fb,FBIOGET_FSCREENINFO,&fb_fix))
 	perror("ioctl FBIOGET_FSCREENINFO");
-    if (fb_ovar.bits_per_pixel == 8 ||
+    if (NULL != ofbcontent) {
+        memcpy(fb_mem + fb_mem_offset, ofbcontent, fb_fix.smem_len);
+        free(ofbcontent);
+        ofbcontent = NULL;
+    }
+    if (fb_fix.visual == FB_VISUAL_PSEUDOCOLOR ||
 	fb_fix.visual == FB_VISUAL_DIRECTCOLOR) {
 	if (-1 == ioctl(fb,FBIOPUTCMAP,&ocmap))
 	    perror("ioctl FBIOPUTCMAP");