Load kernel from reserved sectors in fatfs

boot/kernel.asm

@@ -7,11 +7,12 @@
 		; kernel stack size in words
 %define		stacksize 512
 
-		jmp init
+		jmp near init
 
-		times ( 0x0B - ($-$$) ) db " "
+		db "LOVELAIN"
 
-		times bpb_size db 0
+		; mformat writes stuff until 0x3E
+params:		times ( 0x3E - ($-$$) ) nop
 
 init:		cli
 		xor ax, ax
@@ -20,11 +21,31 @@ init:		cli
 		mov ss, ax
 		mov sp, ( stack+stacksize )
 
+		mov ax, [params+bpb.sectoroffset]
+		mov dx, [params+bpb.sectoroffset+2]
+
+		mov ax, 0x0201
+		mov cx, 0x0002
+		mov dh, 0
+		mov bx, 0x7E00
+		int 0x13
+
+		mov ax, [0x7E00]
+		mov cx, [0x7E02]
+		mov dx, [0x7E04]
+
 		int 3
 
 hlt:		hlt
 		jmp hlt
 
+		times (0x1FE - ($-$$)) db 0
+		dw 0xAA55
+
+		db "rdos kernel"
+
+end:		align 512
+
 section .bss
 
 stack:		resb stacksize

boot/mbr.asm

@@ -131,7 +131,7 @@ part1:	db 0x80
 	db 0x01
 	db 0xFF, 0xFF, 0xFF
 	dd 1
-	dd (FLOPPY * 2)
+	dd (1440 * 2)
 
 	times (0x1FE - ($-$$)) db 0