ACID OS

$ dpkg --get-selections | grep bochs
bochs                                           install
bochs-sdl                                       install
bochs-svga                                      install
bochs-wx                                        install
bochs-x                                         install
bochsbios                                       install

megs: 32
romimage: file=$BXSHARE/BIOS-bochs-latest, address=0xf0000
vgaromimage: file=/usr/share/vgabios/vgabios.bin
vga: extension=vbe
floppya: 1_44=acidos, status=inserted status=inserted
boot: a
log: bochsout.txt
mouse: enabled=0
ips: 15000000
vga_update_interval: 150000

; 
; ACID OPERATING SYSTEM
; Copyright (c) 2003 Lobstertech, Inc.
;
; This program is free software, distributed under the terms of the
; GNU General Public License v2 or later.
;
; Keep it open source pigs
;

[BITS 16]			; 16 bit code generation
[ORG 0x7C00]			; Origin location
	
	JMP	start

x	DW 0

	;; width 29 chars (0..28)
logo:	DB "\.      .! ^ ,--.  $  ^ .---,"
	DB " `\    /.  ! |  !  /  + |._  "
	DB "  ^\  .`   # <==.  |  +    `,"
	DB "    ``     I >   \ .__,  .__)"
	DB " _ ___ ___  ___ _ _ ____ __  "
	DB "    YOUR COMPUTER IS DEAD    "

start:	MOV	AX, 07C0h	; set this up so we can access memory
	MOV	SS, AX
	MOV	SP, 03FEh
	PUSH	CS
	POP	DS
	
	AND	AH, 0		; set vid mode 80x25
	MOV	AL, 2		; 6 is monochrome, 5 is messed up
	INT	10h
	AND	BX, 0		; first page, first color
	MOV	CX, 1		; one at a time
	AND	DX, 0		; dh = y, dl = x
	MOV	AH, 06h		; write char interrupt
go:	MOV	AL, 2
	ADD	AL, byte [x]
	ADD	AL, byte [x+1]
	ADD	byte [x], 7
	CALL	setch		; face character
	INT	10h
	ADD	BL, byte [x]	; change color - 13 works good
	ADD	BL, byte [x+1]
	MOV	AH, 02h		; move cursor
	INC	DL
	CMP	DL, 79
	JL	skip
	AND	DL, 0
	INC	DH
	CMP	DH, 24
	JL	skip
	AND	DH, 0
skip:	INT	10h
	MOV	AH, 09h
	JMP	go
	
setch:	CMP	DH, 7		; is cursor in logo area?
	JL	face
	CMP	DH, 12
	JG	face
	CMP	DL, 10
	JL	face
	CMP	DL, 38
	JG	face
	MOV	SI, logo	;		`si' stores pointer to char
	MOV	DI, DX		; save `dx'	`di' stores dx
	SUB	DH, 7
loopy:	CMP	DH, 0
	JE	dox
	ADD	SI, 29		; increase pointer a line
	DEC	DH
	JMP	loopy
dox:	SUB	DL, 10
	AND	DX, 00FFh	; cut off hi bits so we can add using dx
	ADD	SI, DX
	MOV	DX, DI		; restore `dx'
	MOV	AL, [SI]	; grab the char
	CMP	AL, ' '
	JE	fin
	MOV	BL, 0Eh		; yellow text on black
fin:	RET
face:	RET			; don't change the char

	times 510-($-$$) db 0	;  Fill the rest with zeros
	dw 0xAA55		;  Boot loader signature