Merge pull request #4 from sarkiroka/main

Added oVirt ASCII art

512-byte-vm.asm

@@ -1,28 +1,71 @@
 ORG 0x7C00 ; Starting address of the boot loader. BIOS expects it to be here.
 BITS 16 ; Start program in 16 bit mode. This is the default mode when the CPU starts.
 
-main:
-    MOV SI, text_hello_world ; Move pointer to the text label into the SI register
-    CALL printText
-    JMP halt
-
-; printText prints a null-terminated string from the address passed in SI using the BIOS facility
-printText:
-    MOV AH, 0x0E ; Set BIOS / INT 10 printing facility to text output
-.printChar:
-    LODSB ; Load byte from the address in SI into AL and advance SI by one
-    OR AL, AL ; Equal to CMP AL, 0, but shorter in byte code
-    JE .printReturn ; If yes, jump to the return
-    INT 0x10 ; Trigger BIOS print method
-    JMP .printChar ; Repeat for next byte
-.printReturn:
-    RET ; Return from the printText function
-
-halt:
-    HLT ; Halt CPU if the APM shutdown failed.
-
-text_hello_world:
-    DB "Hello World!", 13, 0 ; Embed data into binary, zero-terminated.
+	MOV	BP, characters
+	MOV	SI, encoded_text
+	XOR	DX,DX
+print_next_character:
+	LODSB					; next encoded data
+	MOV	DL,AL				; save the "address"
+	AND	DL,0F0h			; remove the "count" part
+	SHR	DL,4				; normalize it
+	MOV	DI,DX				; it doesn't understand effective address with DX, so move to DI
+	MOV	CL,AL				; save the "count" part
+	AND	CL,0Fh				; remove the "address" part
+	CMP	CL,0				; is it the end? when count==0 that mean the end
+	JZ	end_of_print			; yes, this is the end of encoded data
+	CMP	CL,0Fh				; is it special character? when count==15 that mean special non-compressed character
+	JNZ	continue_to_compressed_text	; no, continue with compressed character
+	LODSB					; yes, it not compressed, load next byte
+	MOV	CL,1				; the count is always 1 for special characters
+	JMP	print_again			; go to print
+continue_to_compressed_text:
+	MOV	AL,[BP+DI]			; load the "real" character
+print_again:
+	MOV	AH,0Eh				; teletype mode
+	MOV	BX,7				; lightgray character on black background
+	INT	10h				; call the print BIOS service
+	DEC	CL				; calculate how many character remain
+	JNZ	print_again			; if has more, then print it again
+	JMP	print_next_character		; else print next character
+
+
+end_of_print:
+	XOR	AH,AH				; wait a keyboard press
+	INT	16h				; call BIOS service
+
+shutdown:
+	MOV	AX,0x1000			; fallback segment
+	MOV	SS,AX				; store into stacksegment
+	MOV	SP,0f000h			; fallback offset
+	MOV	AX,5307h			; call apm service: set power state
+	MOV	BX,1				; to all device
+	MOV	CX,3				; power off
+	INT	15h				; call BIOS service (apm)
+ 	RET					; fallback when apm failed - direct jump into reboot address
+
+characters:					; the real characters: "█k╚r╗s║╔═╝ ao--"
+						; indexes               0123456789abcde
+	DB	219,107,200,114,187,115,186,201,205,188,32,97,111,10,13
+
+encoded_text:
+	DB 0d1h,0e1h
+	;  o                      V                                       i            r                                 t
+	DB 0a9h,                  02h,41h,0a5h,02h,41h,                   02h,41h,     0aah,                             02h,41h,0d1h,0e1h
+	DB 0a9h,                  02h,61h,0a5h,02h,61h,                   21h,81h,91h, 0a8h,                             07h,41h,0d1h,0e1h
+	DB 0a1h,06h,41h,0a1h,     02h,61h,0a5h,02h,61h,                   02h,41h,     02h,41h,04h,41h,                  0a2h,02h,71h,82h,91h,0d1h,0e1h
+	DB 02h,71h,83h,02h,41h,   21h,02h,41h,0a3h,02h,71h,91h,           02h,61h,     04h,71h,81h,02h,41h,              0a1h,02h,61h,0d1h,0e1h
+	DB 02h,61h,0a3h,02h,61h,  0a1h,21h,02h,41h,0a1h,02h,71h,91h,0a1h, 02h,61h,     02h,71h,81h,91h,0a1h,21h,81h,91h, 0a1h,02h,61h,0a1h,02h,41h,0d1h,0e1h
+	DB 21h,06h,71h,91h,       0a2h,21h,04h,71h,91h,0a2h,              02h,61h,     02h,61h,0a7h,                     21h,04h,71h,91h,0d1h,0e1h
+	DB 0a1h,21h,85h,91h,0a4h, 21h,83h,91h,0a3h,                       21h,81h,91h, 21h,81h,91h,0a8h,                 21h,83h,91h,0d1h,0e1h
+	
+	DB 0aeh,0aeh,0a4h,0fh,6ah,0b1h,0fh,6eh,0c1h,51h,0fh,7ah,0fh,65h,0fh,6eh,0d1h,0e1h
+	DB 0aeh,0aeh,0a3h,51h,0b1h,31h,11h,0fh,69h,31h,0c1h,11h,0b1h,0d1h,0e1h
+	DB 0d1h,0e1h,0d1h,0e1h,0fh,07h
+
+	DB 0fh,48h,0fh,65h,0fh,6ch,0fh,6ch,0c1h,0a1h,0fh,57h,0c1h,31h,0fh,6ch,0fh,64h,0a1h, 0fh,69h,51h,0a1h, 0c1h,11h,0fh,2eh,0fh,2eh,0fh,2eh,0d1h,0e1h
+	
+	DB 0					; end of encoded text
 
 TIMES 510 - ($ - $$) DB 0 ; Fill up 510 bytes
-DW 0xAA55 ; Write magic bytes for boot loader
+DW 0xAA55 ; Write magic bytes for boot loader

test.sh

@@ -36,8 +36,7 @@ echo 'screendump /tmp/screendump
 quit' | nc localhost 2000 >/dev/null
 sleep 1
 echo "Performing OCR and evaluating results..."
-# We skip the H here because the OCR might interpret the blinking cursor as an underscore instead of a H
-if [ $(gocr -m 4 /tmp/screendump | grep 'ello World' | wc -l) -eq 1 ]; then
+if [ $(gocr -m 4 /tmp/screendump | grep 'Hello World' | wc -l) -eq 1 ]; then
   echo -e "\033[0;32mTest successful\033[0m"
   exit 0
 fi