--- qemu/roms/seabios/src/pmm.c	2018/04/24 18:27:47	1.1.1.3
+++ qemu/roms/seabios/src/pmm.c	2018/04/24 18:59:04	1.1.1.4
@@ -193,17 +193,6 @@ malloc_setup(void)
     ASSERT32FLAT();
     dprintf(3, "malloc setup\n");
 
-    ZoneLow.info = ZoneHigh.info = ZoneFSeg.info = NULL;
-    ZoneTmpLow.info = ZoneTmpHigh.info = NULL;
-
-    // Clear memory in 0xf0000 area.
-    extern u8 code32flat_start[];
-    if ((u32)code32flat_start > BUILD_BIOS_ADDR)
-        // Clear unused parts of f-segment
-        memset((void*)BUILD_BIOS_ADDR, 0
-               , (u32)code32flat_start - BUILD_BIOS_ADDR);
-    memset(BiosTableSpace, 0, CONFIG_MAX_BIOSTABLE);
-
     // Populate temp high ram
     u32 highram = 0;
     int i;
@@ -252,9 +241,6 @@ malloc_finalize(void)
         add_e820((u32)info->dataend, giveback, E820_RAM);
         dprintf(1, "Returned %d bytes of ZoneHigh\n", giveback);
     }
-
-    // Clear low-memory allocations.
-    memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
 }