demulamu 3 by Pers' Wastaiset Produktiot [web]
USING THIS MULTIMEDIA DEMONSTRATION IS LEGAL FOR ALL THE STANDARDIZED
AGE GROUPS. IT DOES NOT CONTAIN ANY X-RATED OR PRO-NARCOTICS MATERIAL
THAT WOULD BE FATAL OR HARMFUL FOR THE MENTAL SELF-DEVELOPMENT OF A
MODERN CHILD.
FOR RUNNING THIS DEMONSTRATION YOU REQUIRE A COMPUTER WHICH IS
COMPATIBLE WITH THE PERSONAL COMPUTER AND DISK OPERATING SYSTEM
ARCHITECTURES DESIGNED BY INTERNATIONAL BUSINESS MACHINES AND MICROSOFT.
DO NOT TRY TO RUN THIS PROGRAM IN OTHER CONFIGURATIONS BUT THE ONE
DESCRIBED APPROXIMATELY ONE OR TWO ROWS ABOVE THIS SENTENCE.
PWP HAS BLESSED YOU WITH THE CAPABILITY OF VISITING THE PWP PAGE AT
WWW.IWN.FI/~VIZNUT/PWP.HTML. YOU MAY EVEN SEND ELECTRONIC MAIL TO
VIZNUT/PWP (IF YOUR NETSCAPE GIVES YOU THE POSSIBILITY TO). THE
RECOMMENDABLE ADDRESS IS NOWADAYS KNOWN AS VIZNUT@IWN.FI.
=== DEMU LAMU ]I[ PROFESSIONAL TECHNICAL SPECIFICATION ===
FOR GRAPHICS WE HAVE USED A SPECIAL EGA NON-BLINK 80X25 TEXT MODE WHICH
MAKES IT POSSIBLE TO USE A SPECIAL PSEUDO PIXEL 16-COLOR BITMAP MODE IN
THE RESOLUTION OF 80X50 CHUNKS. WE HESITATED FOR A LONG TIME TO TAKE
THIS STEP IN TECHNOLOGICAL DEVELOPMENT BUT WE FINALLY DECIDED TO. THE
DEMO SCENE HAS TOO STRONG AN EFFECT ON INNOCENT PEOPLE.
MORE THAN TWO DIFFERENT BUFFER FORMATS ARE GENERALLY USED FOR STORING
BITMAP SCREEN DATA SUCH AS BITMAP TEXT SCREENS, BITMAP IMAGES,
PSEUDO-FRACTAL MOUNTAIN LANDSCAPE AND 2DS ENGINE OUTPUT. A DISADVANTAGE
OF THIS TECHNIQUE IS THAT THE SCREEN MUST ALWAYS BE FULLY REDRAWN
BETWEEN THE FRAMES WHICH SLOWS DOWN THE CODE. E.G. THE FRAME RATE
OBSERVED DURING THE VERY FIRST PART OF THE PRESENTATION WAS
APPROXIMATELY 4 FPS WITH VIZNUT'S 10MHZ 8088. THIS IS WHY SPECIAL
BACKGROUND ANIMATION GENERATORS (E.G. TUNNELS, SNOW) WERE USED FOR
MAKING THE CODE LOOK (NOTE: JUST LOOK) MORE POWERFUL IN CERTAIN CASES.
AS OPPOSED TO THE MULTI-PART TIMING TECHNIQUE USED IN THE FORMER
EPISODES OF DEMU LAMU, ALL THE TIMERS ARE NOW (THEORETICALLY) FULLY
DEPENDENT ON A SINGLE DEMULAMU MAIN TIMER COUNT HOOKED WITH THE
INTERRUPT #8 WHOSE TICK RATE IS INTENTIONALLY QUADRUPLED BY
REPROGRAMMING THE TIMER CHIP. ALL THE ANIMATION IS NOW FULLY
SYNCHRONISED WITH PWPFRQMODMUSPLRRTN (SEE BELOW) MUSIC PLAYING AS
OPPOSED TO THE VIRTUALLY RANDOM TIMETABLES USED IN THE FORMER EPISODES.
THE FOLLOWING THINGS WERE PRECALCULATED:
- ALL THE CODE
- ALL THE FONTS
- ALL THE TEXT WRITTEN USING THE FONTS
- ALL THE THEDRAW TEXT MODE PICTURES
- ALL THE BITMAP PICTURES
- ALL THE 2DS VECTOR IMAGES (THAT IS, THE DATA STRUCTURES
CONTAINING THE POLAR CO-ORDINATES AND THE COLORS OF THE PSEUDO
PIXELS, NOT THE ACTUAL SCREEN IMAGES)
- ALL THE MUSIC
- THE SINUS TABLE USED IN SOME EFFECTS
- ALL THE RESIDENT SYSTEM STUFF (DOS FONTS, STANDARD PALETTE ETC).
- ALL THE DOCUMENTATION
NOTE: IN ORDER TO HELP THE EVALUATION OF THE SPEED OF THE CODE, A
SPECIAL "PRECALCULATED ANIMATION" NOTATION TEXT IS VISIBLE IN THE BOTTOM
OF THE SCREEN WHILE THE VIDEO SEQUENCES WITHOUT ANY REAL-TIME CALCULATED
MATERIAL ARE BEING PLAYED. WE ASSUME THE PREVIOUS EPISODES WERE
DISQUALIFIED JUST BECAUSE PRECALCULATION WAS NOT MARKED.
THE FOLLOWING ALGORITHMS AND FORMATS WERE USED FOR CALCULATING AND
STORING PRECALCULATED DATA (EXCEPT FOR THE RESIDENT SYSTEM STUFF):
- ALL THE CODE WAS COMPILED FROM A BORLAND TURBO C 2.0 SOURCE WITH
BORLAND TURBO C 2.0 COMPILER THAT WAS SET UP FOR MAKING FULLY
INTEL 8086/8088 COMPATIBLE MACHINE LANGUAGE CODE.
- ALL THE 2DS VECTOR IMAGES WERE FIRST DRAWN INTO BITMAP SOURCES
WITH QEDIT ADVANCED VERSION 2.15 (UNREGISTERED) AND FURTHER
CONVERTED INTO THE PWP-2DS FORMAT WITH A SPECIAL SOFTWARE
APPLICATION PROGRAMMED WITH MICROSOFT QBASIC (PIRATED)
- THE UNREGISTERED QEDIT WAS ALSO USED FOR DRAWING ALL THE RAW
BITMAP IMAGES WHICH WERE FURTHER COMPRESSED INTO PWPACK FORMAT
WITH ANOTHER PROGRAM CODED IN THE VERY SAME MICROSOFT QBASIC
VERSION.
- ALL THE NON-BITMAP TEXT MODE PICTURES WERE DRAWN WITH THEDRAW
VERSION 4.51 AND STORED IN THE EXECUTABLE WITH THE IMAGE
CRUNCHING ALGORITHM SUPPORTED BY THEDRAW.
- THE SINUS TABLE USED FOR THE 2DS ENGINE AND THE MASK GENERATOR
ROUTINES FOR THE TUNNEL AND THE SPHERE EFFECTS WAS PRECALCULATED
INTO A TURBO C 2.0 COMPATIBLE 256-BYTE ARRAY WITH A QBASIC
APPLICATION PROGRAM.
- ALL THE MUSIC WAS COMPOSED BY TWN WITH AN ATARI ST TRACKER
PROGRAM AND FURTHER MODIFIED AND CONVERTED INTO THE OLD SCREAM
TRACKER FORMAT BY VIZNUT WITH THE SCREAM TRACKER VERSION 2.2
RECEIVED FROM VISSY/CP. THE MUSICAL INFORMATION WAS FURTHER
PORTED INTO A SPECIAL HYBRID FORMAT USED BY THE PWP FREQUENCY
MODULATION MUSIC PLAYER ROUTINE (FURTHER, IN SHORT, REFERRED TO
AS PWPFRQMODMUSPLRRTN).
- ALL THE DATA STORED IN THE EXE FILE WAS FURTHER PACKED WITH
LZEXE WHICH IS GENERALLY USED BY PWP FOR PACKING EXECUTABLE
FILES.
- ALL THE DATA INCLUDED IN THE INTRODUCTIONARY MULTIMEDIA PACKAGE
WAS COMPRESSED INTO A SINGLE DISTRIBUTABLE FILE BY USING PKZIP
VERSION 1.93 ALPHA.
THE PROGRAMS AND APPLICATIONS USED FOR CREATING THE PRECALCULATED DATA
(E.G. THE C COMPILER AND QEDIT) ARE NOT INCLUDED IN THE FINAL PACKAGE.
WE HONESTLY ENCOURAGE YOU TO OBTAIN OR CREATE SIMILAR APPLICATIONS BY
YOURSELVES INSTEAD OF ASKING PWP FOR SPECIALLY AUTOGRAPHED VERSIONS. PWP
IS A PUBLIC DOMAIN SOFTWARE DEVELOPMENT COMPANY, NOT A PIRATE WARE
TRADING ORGANIZATION.
THE FOLLOWING PARTS OF THE FINAL CODE WERE RIPPED FROM NON-PWP SOURCES:
- LZEXE DECOMPRESSION ALGORITHM WAS INCLUDED IN THE FINAL CODE
DURING THE PACKAGING STAGE BY THE LZEXE PACKAGER.
- THE UNCRUNCHER ROUTINE FOR CRUNCHED THEDRAW PICTURES IS OBTAINED
FROM AN OBJECT FILE THAT ACCOMPANIES AN OLDER VERSION OF
THEDRAW.
- MOST OF THE WORDS AND GRAMMATICAL STRUCTURES USED FOR WRITING
THE TEXTS IN BOTH THE MULTIMEDIA DEMONSTRATION AND THIS DOCUMENT
(IN CAPITAL LETTERS) CAN BE FOUND IN STANDARD ENGLISH AND
FINNISH DICTIONARIES (MOSTLY IN LOWER CASE, THOUGH). THE WORDS
ARE RECOGNIZED BY THE RESIDENTS OF PLANET EARTH AS A PART OF THE
COLLECTIVE CULTURAL CONSCIOUSNESS OF HUMANKIND AND ARE THEREFORE
NOT COPYRIGHTED.
ALL THE OTHER CODE AND ALGORITHMS WERE DEVELOPED AND CREATED FROM THE
VERY GROUND STAGE BY VIZNUT EXCEPT FOR THE FOLLOWING SPOTLIGHTS:
- THE PICTURES OF YOUR FAVORITE PWP CHARACTERS - THE PELU
LAMURANTA, HIS FATHER, PLANET EARTH, AND THE REPORTER FROM THEIR
FAVORITE COMPUTING MAGAZINE - ARE MOSTLY THE SAME AS THE ONES
SEEN IN FORMER PRODUCTIONS. ONLY MINOR MODIFICATIONS HAVE BEEN
MADE.
- NOSFE/VLP TAUGHT SOMEONE IN THE ATOM HEART MOTHER BULLETIN BOARD
SYSTEM THE BASIC PRINCIPLES OF CREATING A FLAME EFFECT. THE
ALGORITHM USED BY VIZNUT FOR PROGRAMMING THE SPECIAL PWP FLAME
ROUTINE RESEMBLES THE ONE DESCRIBED BY NOSFE.
- THE APPROPRIATE BASICS OF HANDLING SOUND CARD REGISTERS, HOOKING
INTERRUPT VECTORS AND RESETTING THE INTERNAL PC TIMER CHIP WERE
OBTAINED FROM SOURCE FILES DOWNLOADED FROM X2FTP.OULU.FI BY
VIZNUT.
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