added a second program to load from 0x2000 on keypress 0 or 1

Makefile

@@ -3,18 +3,21 @@ all : image
 compile :
 	nasm -f bin -o boot.bin boot.asm
 	nasm -f bin -o program.bin program.asm
+	nasm -f bin -o program2.bin program2.asm
 
 
 image : compile
 	sudo dd if=/dev/zero of=disk.img bs=1024 count=720
 	sudo dd if=boot.bin of=disk.img bs=512 count=1 conv=notrunc
 	sudo dd if=program.bin of=disk.img bs=512 seek=1 count=1 conv=notrunc
+	sudo dd if=program2.bin of=disk.img bs=512 seek=2 count=1 conv=notrunc
+
 
 
 flashusb : image
-        #sudo umount /dev/sdb
 	sudo dd if=boot.bin of=/dev/sdb bs=512 count=1
 	sudo dd if=program.bin of=/dev/sdb bs=512 seek=1 count=1
+	sudo dd if=program2.bin of=/dev/sdb bs=512 seek=2 count=1
 
 run : image
 	qemu-system-x86_64 disk.img
@@ -23,5 +26,3 @@ clean :
 	rm *.img
 	rm *.bin
 
-
-

README.md

@@ -24,3 +24,6 @@ https://stackoverflow.com/questions/36044706/enable-the-boot-loader-to-load-the-
 ###Tutorial on second stage / read interrupt BUT only for floppy :(
 For disk see above
 https://blog.ghaiklor.com/how-to-implement-a-second-stage-boot-loader-80e75ae4270c
+
+###Boc drawing characters
+https://en.wikipedia.org/wiki/Box-drawing_character

boot.asm

@@ -2,6 +2,11 @@
 
 [bits 16]
 
+;cmp dl, 0x05
+;je welcome
+
+;mov [bootdev], dl		; Save boot device number
+
                    ; Use the boot drive number passed to us by BIOS in register DL
 welcome:
     xor ax,ax      ; We want a segment of 0 for DS for this question
@@ -14,7 +19,6 @@ welcome:
 
     cld            ; Set the direction flag to be positive direction
 
-
     mov si, wolf_wel_msg
     call wolf_print
 
@@ -22,10 +26,45 @@ start:
 	mov ah, 0x00
         int 0x16
         cmp al, "0"
-        je load_it_all
+        je load_it_all_0
+        cmp al, "1"
+	je load_it_all_1
 	jmp over
 
-load_it_all:
+load_it_all_0:
+
+    mov si, wolf_kernel_load
+    call wolf_print
+
+    pushf
+    stc
+
+    mov ah,00
+    int 13h
+
+.read_sector:
+        mov ax, 0x0
+        mov es, ax      ; ES = 0
+        mov bx, 0x2000  ; BX = 0x1000. ES:BX=0x0:0x1000
+                        ; ES:BX = starting address to read sector(s) into
+        mov ah, 02      ; Int 13h/AH=2 = Read Sectors From Drive
+        mov al, 01      ; Sectors to read = 1
+        mov ch, 00      ; CH=Cylinder. Second sector of disk
+                        ; is at Cylinder 0 not 1
+        mov cl, 03      ; Sector to read = 2
+        mov dh, 00      ; Head to read = 0
+                        ; DL hasn't been destroyed by our bootloader code and still
+                        ;     contains boot drive # passed to our bootloader by the BIOS
+        int 13h
+
+    jc wolf_error
+    popf
+    jmp 0x0:0x2000
+    cli
+    hlt
+
+
+load_it_all_1:
 
     mov si, wolf_kernel_load
     call wolf_print
@@ -36,7 +75,7 @@ load_it_all:
     mov ah,00
     int 13h
 
-    read_sector:
+.read_sector:
         mov ax, 0x0
         mov es, ax      ; ES = 0
         mov bx, 0x1000  ; BX = 0x1000. ES:BX=0x0:0x1000
@@ -57,6 +96,7 @@ load_it_all:
     cli
     hlt
 
+
 wolf_error:
         mov si, wolf_error_msg
         call wolf_print
@@ -68,7 +108,6 @@ load_it_all:
         int 19h
 
 wolf_print:
-
         lodsb
         or al,al
         jz exit
@@ -89,5 +128,7 @@ wolf_kernel_load db 'Loading program',0x0D,0x0A,0
 wolf_error_msg db 'Program not found!',0x0D,0x0A,0
 wolf_error_msg1 db 'Press any key to restart..',0
 
+;bootdev		db 0 	; Boot device number
+
 times 510-($-$$) db 0
 dw 0xAA55

program2.asm

@@ -0,0 +1,90 @@
+[org 0x2000]
+
+
+start:
+	mov ah, 01h	;make cursor invisible
+	mov cx, 2607h
+	int 10h
+
+	mov ah, 06h    ; Scroll up function
+	xor al, al     ; Clear entire screen
+	xor cx, cx     ; Upper left corner CH=row, CL=column
+	mov dx, 184FH  ; lower right corner DH=row, DL=column
+	mov bh, 1Eh    ; YellowOnBlue
+	int 10H		; execute interrupt
+
+	mov ah, 06h	;draw rect on background
+	mov cx, 0101h
+	mov dx, 164Dh
+	mov bh, 4Fh
+	int 10h
+
+        mov ah, 06h     ;draw shadow
+        mov cx, 1702h
+        mov dx, 174Eh
+        mov bh, 0Eh
+        int 10h
+        mov ah, 06h     ;draw shadow
+        mov cx, 024Eh
+        mov dx, 174Eh
+        mov bh, 0Eh
+        int 10h
+
+
+	mov ah, 02h     ;sets cursor to top to write
+        mov bh, 0h
+        mov dh, 1h
+        mov dl, 1h
+        int 10h
+
+	mov al, 0xC9 ;draw border
+        mov bl, 0x03
+        mov ah,0x0e
+        int 10h
+        mov al, 0xCD
+        mov bl, 0x03
+        mov ah,0x0e
+        int 10h
+
+	mov ah, 02h	;sets cursor to top to write
+	mov bh, 0h
+	mov dh, 4h
+	mov dl, 4h
+	int 10h
+
+	mov si, msg1
+	call print
+	mov si, msg2
+
+	call wait_for_key
+
+wait_for_key:
+        mov ah, 0x00
+        int 0x16
+        cmp al, "0"
+        je exit_bootloader
+        jmp over
+
+
+print:
+        lodsb
+        or al,al
+        jz .exit
+        mov bl, 0x03
+        mov ah,0x0e
+        int 10h
+        jmp print
+        .exit:
+        ret
+
+exit_bootloader:
+mov dl, 0x05
+jmp 0x0:0x7c00 ;jump back to bootloader init
+hlt
+
+over:
+	jmp wait_for_key
+
+
+msg1 db "TEST",0x0A,0
+msg2 db "TEST",0x0D,0x0A,0