The DOS-LOGO Device Driver is [open source]. Date 5/15/2008 Ola Salomonsson.

License:         GNU LESSER GENERAL PUBLIC LICENSE.
License version: 3







;******************************************************************************
;                            DOS-LOGO DEVICE DRIVER
;------------------------------------------------------------------------------
; This driver allows a palette animated bitmap to be shown during the boot
; process of DOS. It has the ability to be deactivated using the Escape
; keystroke. During its session, all text messages will not be erased. The 
; logo is self-sustained and will be hidden once the user requires input. It
; is possible to start a new logo session, or manipulate the current active
; logo session by calling the DOS-LOGO Support interrupts.
;
; DOS-LOGO must run on a 386 or higher CPU. It will only run on VGA graphics
; adapters. It supports the VGA text modes 80x25, 40x25, 80x43 and 80x50. Both
; color and monochrome display adapters are supported.
;
; Requires 3,5 KB conventional memory and a maximum of 20 KB + 128 KB disk 
; space to show a logo.
;	
; Supported logo bitmap formats: Windows BMP and Windows RLE resolution 320x400
; 8-bit colors with the color important word filled with palette animation 
; start and rewind count.
;
; DOS-LOGO is compiled with NASM16: http://nasm.sourceforge.net/.
;
; DOS-LOGO is licensed under the GNU LESSER GENERAL PUBLIC LICENSE. Read the
; textfile lgpl.txt in the same directory as dos-logo.asm, or visit:
; http://www.gnu.org/licenses/lgpl.html.
;
; DOS-LOGO is developed by Ola Salomonsson. Programmed by Ola Salomonsson
; for use with DOS as part of the boot process, but can also be called
; by any loading task within DOS that of its liking.
; Contact: mailto:ola]o[logotypes.se.
;
; DOS-LOGO has been tested and are working with the following versions of DOS:
;
;  MS-DOS version 6.22
;  PC-DOS version 7.X
;  MS-DOS version 7.10
;  DRDOS version 7.X
;
;  MS-DOS is a registered trademark of Microsoft Corporation.
;  PC-DOS is a registered trademark of International Machine Corporation.
;  DRDOS is a trademark of DRDOS, Inc.
;
; Visit http://logosys.logotypes.se/ for technical aspects of DOS-LOGO and for 
; tutorials on how to make propper logo.sys files. And also a nice collection
; of the original logo.sys files for insperation and guidance (note: most of 
; them refer to one or more registered trademarks as stated on the site).
;
; Copyright  2007-2008 Ola Salomonsson, logosys.logotypes.se
; Date 5/15/2008.
;
;
; HOW TO INSTALL:
;  Copy DOS-LOGO.SYS to the bootdisk root (or the OS driver directory). Also
;  store a LOGO.SYS bitmap, or a LOGO.RLE bitmap in the bootdisk root (must be
;  the root on the bootdisk of DOS).
;  Open up CONFIG.SYS, and write this line to the top of the file:
;
;      DEVICE=[d:][path]DOS-LOGO.SYS
;
;  Where [d:] is the drive and [path] is the directory where DOS-LOGO.SYS can
;  be located.
;  It is recommended to add this line to the top of CONFIG.SYS for best visual
;  outcome.
;
;
;
;           This program does not have any warranties, either stated
;           or implied.  By using this program you are assuming full 
;                 responsibility for the program's execution.
;
;******************************************************************************
