Index: src/stream/Config.lb
===================================================================
--- src/stream/Config.lb	(revision 2286)
+++ src/stream/Config.lb	(working copy)
@@ -1,3 +1,4 @@
+uses CONFIG_COMPRESSED_ROM_STREAM
 uses CONFIG_ROM_STREAM
 uses CONFIG_IDE_STREAM
 uses CONFIG_FS_STREAM
@@ -7,6 +8,10 @@
   object rom_stream.o
 end
 
+if CONFIG_COMPRESSED_ROM_STREAM
+  object zrom_stream.o
+end
+
 if CONFIG_IDE_STREAM
   default CONFIG_IDE=1
   object ide_stream.o
Index: src/stream/zrom_stream.c
===================================================================
--- src/stream/zrom_stream.c	(revision 0)
+++ src/stream/zrom_stream.c	(revision 0)
@@ -0,0 +1,133 @@
+#include <console/console.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stream/read_bytes.h>
+#include <string.h>
+
+#define GETBIT(bb, src, ilen) \
+    (bc > 0 ? ((bb>>--bc)&1) : (bc=31,\
+    bb=*(const uint32_t *)((src)+ilen),ilen+=4,(bb>>31)&1))
+
+static void unrv2b(uint8_t * src, uint8_t * dst)
+{
+	unsigned long ilen = 0, olen = 0, last_m_off = 1;
+	uint32_t bb = 0;
+	unsigned bc = 0;
+	const uint8_t *m_pos;
+
+	src += 4;
+
+	for (;;) {
+		unsigned int m_off, m_len;
+		while (GETBIT(bb, src, ilen)) {
+			dst[olen++] = src[ilen++];
+		}
+
+		m_off = 1;
+		do {
+			m_off = m_off * 2 + GETBIT(bb, src, ilen);
+		} while (!GETBIT(bb, src, ilen));
+		if (m_off == 2) {
+			m_off = last_m_off;
+		} else {
+			m_off = (m_off - 3) * 256 + src[ilen++];
+			if (m_off == 0xffffffffU)
+				break;
+			last_m_off = ++m_off;
+		}
+
+		m_len = GETBIT(bb, src, ilen);
+		m_len = m_len * 2 + GETBIT(bb, src, ilen);
+		if (m_len == 0) {
+			m_len++;
+			do {
+				m_len = m_len * 2 + GETBIT(bb, src, ilen);
+			} while (!GETBIT(bb, src, ilen));
+			m_len += 2;
+		}
+		m_len += (m_off > 0xd00);
+
+		m_pos = dst + olen - m_off;
+		dst[olen++] = *m_pos++;
+		do {
+			dst[olen++] = *m_pos++;
+		} while (--m_len > 0);
+	}
+
+}
+
+#ifndef CONFIG_ROM_STREAM_START
+#define CONFIG_ROM_STREAM_START 0xffff0000UL
+#endif
+
+unsigned char *rom_start = (unsigned char *)CONFIG_ROM_STREAM_START;
+unsigned char *rom_end = (unsigned char *)(CONFIG_ROM_STREAM_START + PAYLOAD_SIZE - 1);;
+
+extern unsigned char _heap, _eheap;
+
+static const unsigned char *rom;
+
+int stream_init(void)
+{
+	unsigned long compressed_rom_start=rom_start; 
+	unsigned long compressed_rom_end=rom_end; 
+	unsigned int len;
+	
+	len=*(unsigned int *)compressed_rom_start; // LE only for now
+
+	printk_debug (" compressed rom stream: 0x%08lx - 0x%08lx\n",
+				compressed_rom_start, compressed_rom_end);
+
+	rom_start = &_eheap;
+	rom_end = rom_start + len; // LE only for now
+#if 0
+	{
+	int i;
+	for (i=0; i<512; i++) {
+		if( i%16==0) printk_spew("\n%04x :", i);
+		printk_spew(" %02x", *(unsigned char *)(compressed_rom_start+i));
+	}
+	}
+#endif
+	printk_debug(" rom stream: 0x%08lx - 0x%08lx\n", (unsigned long) 
+			rom_start, (unsigned long) rom_end);
+
+	printk_debug("Uncompressing...");
+	unrv2b((uint8_t *) compressed_rom_start, (uint8_t *)rom_start);
+	printk_debug(" done.\n");
+	
+	rom = rom_start;
+
+	return 0;
+}
+
+void stream_fini(void)
+{
+	return;
+}
+
+byte_offset_t stream_skip(byte_offset_t count)
+{
+	byte_offset_t bytes;
+	bytes = count;
+	if ((rom + bytes) > rom_end) {
+		printk_warning(" overflowed source buffer\n");
+		bytes = 0;
+		if (rom <= rom_end) {
+			bytes = (rom_end - rom) + 1;
+		}
+	}
+	rom += bytes;
+	return bytes;
+}
+
+byte_offset_t stream_read(void *vdest, byte_offset_t count)
+{
+	unsigned char *dest = vdest;
+	const unsigned char *src = rom;
+	byte_offset_t bytes;
+
+	bytes = stream_skip(count);
+	memcpy(dest, src, bytes);
+	return bytes;
+}
Index: src/stream/rom_stream.c
===================================================================
--- src/stream/rom_stream.c	(revision 2286)
+++ src/stream/rom_stream.c	(working copy)
@@ -18,8 +18,8 @@
  */
 
 /*XXXXXXXXXXXXXX */
-/*static const */unsigned char *rom_start = (void *)CONFIG_ROM_STREAM_START;
-/*static const */unsigned char *rom_end   = (void *)(CONFIG_ROM_STREAM_START + PAYLOAD_SIZE - 1);
+/*static const */unsigned char *rom_start = (unsigned char *)CONFIG_ROM_STREAM_START;
+/*static const */unsigned char *rom_end   = (unsigned char *)(CONFIG_ROM_STREAM_START + PAYLOAD_SIZE - 1);
 /*XXXXXXXXXXXXXX */
 static const unsigned char *rom;
 
Index: src/config/Options.lb
===================================================================
--- src/config/Options.lb	(revision 2286)
+++ src/config/Options.lb	(working copy)
@@ -564,6 +564,11 @@
 	export always
 	comment "ROM stream start location"
 end
+define CONFIG_COMPRESSED_ROM_STREAM
+	default 0
+	export always
+	comment "compressed boot image is located in ROM" 
+end
 define CONFIG_FS_STREAM
 	default 0
 	export always
Index: src/arch/i386/Config.lb
===================================================================
--- src/arch/i386/Config.lb	(revision 2286)
+++ src/arch/i386/Config.lb	(working copy)
@@ -18,9 +18,22 @@
 	action	"$(HOSTCC) -O2 -DENCODE -DDECODE -DMAIN -DVERBOSE -DNDEBUG -DBITSIZE=32 -DENDIAN=0 $< -o $@"
 end
 
+makerule payload
+	depends "$(PAYLOAD)"
+	action  "cp $< $@"
+end
+
+makerule payload.nrv2b
+	depends "$(PAYLOAD) nrv2b"
+	action  "./nrv2b e $(PAYLOAD) $@"
+end
+
+makedefine PAYLOAD-1:=payload
+makedefine PAYLOAD-$(CONFIG_COMPRESSED_ROM_STREAM):=payload.nrv2b
+
 makerule linuxbios.rom 
-	depends	"linuxbios.strip buildrom" 
-	action "./buildrom $< $@ $(PAYLOAD) $(ROM_IMAGE_SIZE) $(ROM_SECTION_SIZE)"
+	depends	"linuxbios.strip buildrom $(PAYLOAD-1)" 
+	action "./buildrom $< $@ $(PAYLOAD-1) $(ROM_IMAGE_SIZE) $(ROM_SECTION_SIZE)"
 end
 
 makerule crt0.S