diff --git a/.gitignore b/.gitignore
index 4f24396..3782d05 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,4 +7,6 @@ kofuse
 mkdirrange
 *.img
 *.img.xz
+*.img.gz
+*.img.lz4
 *.img.info
diff --git a/kolibri.asm b/kolibri.asm
index f318763..6312958 100644
--- a/kolibri.asm
+++ b/kolibri.asm
@@ -68,13 +68,18 @@ proc disk_read stdcall, userdata, buffer, startsector:qword, numsectors
         pushad
         mov     eax, dword[startsector + 0]   ; sector lo
         mov     edx, dword[startsector + 4]   ; sector hi
-        imul    ecx, eax, 512
+        xor     ecx, ecx
+        imul    edx, eax, 512
+;DEBUGF 1, "lseek to: %x\n", ecx
         mov     eax, [userdata]
         mov     ebx, [eax + FILE_DISK.fd]
-        mov     edx, SEEK_SET
-        mov     eax, SYS_LSEEK
+        sub     esp, 8
+        mov     esi, esp
+        mov     edi, SEEK_SET
+        mov     eax, SYS_LLSEEK
         int     0x80
-;DEBUGF 1, "lseek: %x\n", eax
+        add     esp, 8
+;DEBUGF 1, "lseek: %x\n",eax
         popad
 
         pushad
@@ -98,13 +103,18 @@ proc disk_write stdcall, userdata, buffer, startsector:qword, numsectors
         pushad
         mov     eax, dword[startsector + 0]   ; sector lo
         mov     edx, dword[startsector + 4]   ; sector hi
-        imul    ecx, eax, 512
+        xor     ecx, ecx
+        imul    edx, eax, 512
+;DEBUGF 1, "lseek to: %x\n", ecx
         mov     eax, [userdata]
         mov     ebx, [eax + FILE_DISK.fd]
-        mov     edx, SEEK_SET
-        mov     eax, SYS_LSEEK
+        sub     esp, 8
+        mov     esi, esp
+        mov     edi, SEEK_SET
+        mov     eax, SYS_LLSEEK
         int     0x80
-;DEBUGF 1, "lseek: %x\n", eax
+        add     esp, 8
+;DEBUGF 1, "lseek: %x\n",eax
         popad
 
         pushad
diff --git a/system.inc b/system.inc
index 501479a..4d39bd4 100644
--- a/system.inc
+++ b/system.inc
@@ -3,7 +3,8 @@ SYS_READ    = 3
 SYS_WRITE   = 4
 SYS_OPEN    = 5
 SYS_CLOSE   = 6
-SYS_LSEEK   = 19
+;SYS_LSEEK   = 19
+SYS_LLSEEK  = 140
 
 SEEK_SET    = 0
 SEEK_CUR    = 1