diff --git a/sw/bios/bootloader.s b/sw/bios/bootloader.s
index 47ef646..38718e3 100644
--- a/sw/bios/bootloader.s
+++ b/sw/bios/bootloader.s
@@ -1,4 +1,4 @@
-.importzp sp, ptr1, ptr2, ptr3, ptr4, tmp1, tmp2, tmp3
+.importzp sp, ptr1, ptr2, ptr3, ptr4, tmp1, tmp2, tmp3, sreg
 
 .autoimport on
 
@@ -11,6 +11,10 @@ _console_read_char      = $2
 _console_write_char     = $4
 _sd_readblock           = $6
 
+buf  = $8200
+addrh = $0000
+addrl = $0001
+
 .segment "BOOTSECTOR"
 
 _start:
@@ -18,10 +22,35 @@ _start:
 
 .byte "SUPR6502"
 
+_preamble:
+
+.res (11+_start-_preamble)
+
+_bpb: .res 60
+
 _main:
         lda #<str
         ldx #>str
         jsr _cputs
+
+        lda #<addrh
+        sta sreg
+        lda #>addrh
+        sta sreg + 1
+        lda #<addrl
+        ldx #>addrl
+        jsr pusheax
+        lda #<buf
+        ldx #>buf
+        jsr pushax
+        lda #<ptr1
+        ldx #>ptr1
+        jsr _SD_readSingleBlock
+        
+        lda #<buf
+        ldx #>buf
+        jsr _SD_printBuf
+
 @end:   bra @end
 
 
@@ -29,7 +58,9 @@ str: .asciiz "Hello from the bootloader!\r\n"
 
 _end:
 
-.res (446+_start-_end)
+.res (440+_start-_end)
+
+.res 6
 
 .res 16
 .res 16
diff --git a/sw/script/format_disk.sh b/sw/script/format_disk.sh
index 0564b50..787e635 100644
--- a/sw/script/format_disk.sh
+++ b/sw/script/format_disk.sh
@@ -5,7 +5,7 @@ DEVICE=/dev/mmcblk0
 TMPBOOTSECT=/tmp/bootsect
 TMPMOUNT=/tmp/sd
 
-V=
+V=-v
 STATUS="status=none"
 
 echo "$(tput bold setaf 11)Creating Filesystem$(tput sgr 0)"
@@ -13,7 +13,7 @@ sudo mkfs.vfat -F32 $DEVICE -n SUPER6502 $V
 echo
 
 echo "$(tput bold setaf 11)Modifying Boot Sector$(tput sgr 0)"
-sudo dd if=$BOOTLOADER of=$DEVICE bs=446 count=1 $STATUS
+sudo dd if=$BOOTLOADER of=$DEVICE bs=1 count=11 $STATUS
+sudo dd if=$BOOTLOADER of=$DEVICE bs=1 count=380 seek=71 skip=71 $STATUS
 
 echo "$(tput bold setaf 10)Done!$(tput sgr 0)"
-