diff --git a/umka.asm b/umka.asm
index 7441fa8..d3c3aba 100644
--- a/umka.asm
+++ b/umka.asm
@@ -89,6 +89,10 @@ UMKA_OS    = 3
 
 UMKA_MEMORY_BYTES = 256 SHL 20
 
+UMKA_BOOT_DEFAULT_DISPLAY_BPP = 32
+UMKA_BOOT_DEFAULT_DISPLAY_WIDTH = 400
+UMKA_BOOT_DEFAULT_DISPLAY_HEIGHT = 300
+
 public idle_reached
 pubsym irq_serv.irq_10, 'kos_irq_serv_irq10'
 pubsym idts, 'kos_idts'
@@ -586,6 +590,14 @@ ends
 
 proc umka_init c uses ebx esi edi ebp, _running
         call    umka._.check_alignment
+        ; init boot vars
+        mov     eax, BOOT
+        mov     [eax + boot_data.x_res], UMKA_BOOT_DEFAULT_DISPLAY_WIDTH
+        mov     [eax + boot_data.y_res], UMKA_BOOT_DEFAULT_DISPLAY_HEIGHT
+        mov     [eax + boot_data.bpp], UMKA_BOOT_DEFAULT_DISPLAY_BPP
+        mov     [eax + boot_data.pitch], UMKA_BOOT_DEFAULT_DISPLAY_BPP * \
+                UMKA_BOOT_DEFAULT_DISPLAY_WIDTH / 8
+        ; init umka context
         mov     eax, umka
         mov     [eax+umka_ctx.booted], 0
         mov     ecx, [_running]
diff --git a/umka.h b/umka.h
index ac61f56..70e3cb2 100644
--- a/umka.h
+++ b/umka.h
@@ -43,10 +43,6 @@ struct umka_ctx {
     atomic_int running;
 };
 
-#define UMKA_DEFAULT_DISPLAY_BPP 32
-#define UMKA_DEFAULT_DISPLAY_WIDTH 400
-#define UMKA_DEFAULT_DISPLAY_HEIGHT 300
-
 #define KEYBOARD_MODE_ASCII     0
 #define KEYBOARD_MODE_SCANCODES 1
 
diff --git a/umka_fuse.c b/umka_fuse.c
index dda3c78..26e49d7 100644
--- a/umka_fuse.c
+++ b/umka_fuse.c
@@ -167,14 +167,10 @@ main(int argc, char *argv[]) {
         exit(1);
     }
 
-    kos_boot.bpp = UMKA_DEFAULT_DISPLAY_BPP;
-    kos_boot.x_res = UMKA_DEFAULT_DISPLAY_WIDTH;
-    kos_boot.y_res = UMKA_DEFAULT_DISPLAY_HEIGHT;
-    kos_boot.pitch = UMKA_DEFAULT_DISPLAY_WIDTH * UMKA_DEFAULT_DISPLAY_BPP / 8;
-
     struct umka_fuse_ctx *ctx = umka_fuse_init();
+    umka_boot();
 
-    struct vdisk *umka_disk = vdisk_init(argv[2], 1, 0u, 0);
+    struct vdisk *umka_disk = vdisk_init(argv[2], 1, 0u, ctx->io);
     disk_t *disk = disk_add(&umka_disk->diskfunc, "hd0", umka_disk, 0);
     disk_media_changed(disk, 1);
     return fuse_main(argc-1, argv, &umka_oper, ctx);
diff --git a/umka_os.c b/umka_os.c
index d6d090f..1c6033e 100644
--- a/umka_os.c
+++ b/umka_os.c
@@ -353,11 +353,6 @@ main(int argc, char *argv[]) {
     }
     memset((void*)app_ldr, 0, APP_MAX_MEM_SIZE);
 
-    kos_boot.bpp = UMKA_DEFAULT_DISPLAY_BPP;
-    kos_boot.x_res = UMKA_DEFAULT_DISPLAY_WIDTH;
-    kos_boot.y_res = UMKA_DEFAULT_DISPLAY_HEIGHT;
-    kos_boot.pitch = UMKA_DEFAULT_DISPLAY_WIDTH * UMKA_DEFAULT_DISPLAY_BPP / 8;
-
     run_test(os->shell);
     os->shell->fin = fin;
     clearerr(stdin);    // reset feof
diff --git a/umka_shell.c b/umka_shell.c
index 6a7ee22..aae7c1f 100644
--- a/umka_shell.c
+++ b/umka_shell.c
@@ -75,11 +75,6 @@ main(int argc, char **argv) {
     kos_boot.memmap_blocks[1] = (e820entry_t){(uintptr_t)mem1, 128*1024*1024, 1};
     kos_boot.memmap_blocks[2] = (e820entry_t){(uintptr_t)mem2, 256*1024*1024, 1};
 */
-    kos_boot.bpp = UMKA_DEFAULT_DISPLAY_BPP;
-    kos_boot.x_res = UMKA_DEFAULT_DISPLAY_WIDTH;
-    kos_boot.y_res = UMKA_DEFAULT_DISPLAY_HEIGHT;
-    kos_boot.pitch = UMKA_DEFAULT_DISPLAY_WIDTH * UMKA_DEFAULT_DISPLAY_BPP / 8;
-
     int reproducible = 0;
 
     struct optparse options;