Disk reading partly done

source/kernel/kernel.asm

@@ -1,12 +1,17 @@
-ORG 0h
+ORG 00h
 BITS 16
+root_buffer equ 24000h
+data_buffer equ 26000h
 
 start:
    mov si, boot_message
    call os_print_string
 
-   mov si, help_text
-   call os_print_string
+   call disk_load_root ; Loads the root directory into disk_buffer
+
+   ; Physical address = (segment * 16) + offset
+   mov si, file_name
+   call disk_load_file
 
    call os_start_cli
    hlt
@@ -14,7 +19,31 @@ start:
 halt:
    jmp halt
 
-boot_message: db 'OK] Kernel successfully loaded!\n', 0
+boot_message: db 'OK] Kernel successfully loaded!\n\n', 0
+file_name: db 'hello.cws', 0
+
+; Define Fat12 header
+bdb_oem:                    db 'MSWIN4.1' ; ignore
+bdb_bytes_per_sector:       dw 200h ; = 512d
+bdb_sectors_per_cluster:    db 01h ; sector = cluster
+bdb_reserved_sectors:       dw 01h
+bdb_fat_count:              db 02h  ; We've got a fat1 and fat2
+bdb_dir_entries_count:      dw 0E0h ; Maximum number of root directory entries
+bdb_total_sectors:          dw 0B40h ; = 2880d
+bdb_media_descriptor_type:  db 0F0h ; ignore
+bdb_sectors_per_fat:        dw 09h
+bdb_sectors_per_track:      dw 12h ; = 18d
+bdb_number_of_heads:        dw 02h ; top and bottom of the floppy disk
+bdb_hidden_sectors:         dd 0 ; ignore
+bdb_large_sector_count:     dd 0 ; total sector count for fat32 (0 for fat12 or fat16)
+
+; extended boot record
+ebr_drive_number:           db 0 ; ignore
+                            db 0 ; ignore
+ebr_signature:              db 29h ; boot signature, indicates that the next three fields are present (0x29)
+ebr_volume_id:              db 12h, 34h, 56h, 78h ; unique id for volume tracking
+ebr_volume_label:           db 'CrawShaw OS' ; must be 11 bytes
+ebr_system_id:              db 'FAT12   ' ; must be 8 bytes
 
 ; ------------------------------------------------------------------
 ; FEATURES -- Code to pull into the kernel
@@ -25,5 +54,8 @@ boot_message: db 'OK] Kernel successfully loaded!\n', 0
 	%INCLUDE "source/kernel/features/strings.asm"
 	%INCLUDE "source/kernel/features/graphics.asm"
     %INCLUDE "source/kernel/features/disk.asm"
+    %INCLUDE "source/kernel/features/math.asm"
 ; GAMES -- Games that I wrote for it
 	%INCLUDE "source/kernel/games/pong.asm"
+
+