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DJGPP教程1 -- 介绍
使用 LLM 解释/回答一下
For the first step I will discuss about programming VGA cards at a resolution of 320x200 with 256 colors. This is the magic BIOS mode 13h, simple to use and very efficiently. Next I'll explain how to use the BMP and PCX graphics format at this resolution, whit the basics about sprites and frames.
What languages should I use?
Until writing programs under DOS or Linux the best choice about languages is the famous C/C++. I prefer it because is very powerful, fast and very simple to interface with assembly procedures. If I write programs under Windows I prefer Delphi because is very simple to use, but I hardly make programs under Windows. Only under DOS or Linux I can take the whole control of the keyboard, the timer, the graphics card with my own code. Instead under Windows I must use the code written by other (because this OS is very hardly to use) and I never can take the whole control of the machine. In my opinion the windows system is useful only for serious application, not for games. Pheraphs I know only a bit about this system, so I can say bad.
How about compilators?
For years I've used Turbo C and next Borland C/C++. Those compilators was very good for the DOS machine: very fast in compiling and linking and easy to use. But the programs compiled with those compilers are limited by the 16 bit code. But since I've discovered Internet I've used the great DJGPP 32 bit compiler: fast, powerful and FREE! I think is the best choice if you haven't enough money to buy Watchom C/C++, another 32 bit compiler. Read the next paragraph for more information.
What is DJGPP?
DJGPP is a 32 bit compiler for the i386 (or better) processor based upon DOS system. It use an DPMI server which allows a 4 GByte flat address space and up to 256 MBytes of virtual memory. It's very similar to the GNU project for Linux. For details see the readme.1st downloaded from one of the following ftp servers.
You can download the files from a lot of ftp site. There are a list:
Country Host Directory
--------- ---------------------- -------------------
Australia ftp.iniaccess.net.au /pub/simtelnet
Australia ftp.tas.gov.au /pub/simtelnet
Belgium ftp.linkline.be /mirror/simtelnet
Belgium ftp.tornado.be /pub/simtelnet
Brazil ftp.unicamp.br /pub/simtelnet
Canada ftp.direct.ca /pub/simtelnet
Canada ftp.synapse.net /pub/simtelnet
Czech Republic pub.vse.cz /pub/simtelnet
China ftp.pku.edu.cn /pub/simtelnet
England micros.hensa.ac.uk /pub/simtelnet
England ftp.demon.co.uk /pub/simtelnet
England sunsite.doc.ic.ac.uk /packages/simtelnet
Finland ftp.funet.fi /mirrors/ftp.simtel.net/pub/simtelnet
France ftp.grolier.fr /pub/simtelnet
France ftp.ibp.fr /pub/simtelnet
Germany ftp.tu-chemnitz.de /pub/simtelnet
Germany ftp.uni-heidelberg.de /pub/simtelnet
Germany ftp.uni-paderborn.de /pub/simtelnet
Germany ftp.uni-trier.de /pub/pc/mirrors/simtelnet
Hong Kong ftp.hkstar.com /pub/simtelnet
Hong Kong sunsite.ust.hk /pub/simtelnet
Italy cis.utovrm.it /simtelnet
Italy ftp.unina.it /pub/simtelnet
Japan ftp.iij.ad.jp /pub/simtelnet
Japan ftp.riken.go.jp /pub/simtelnet
Japan ftp.saitama-u.ac.jp /pub/simtelnet
Korea ftp.nuri.net /pub/simtelnet
Mexico ftp.gdl.iteso.mx /pub/simtelnet
Netherlands ftp.nic.surfnet.nl /mirror-archive/software/simtelnet
New Zealand ftp.vuw.ac.nz /pub/simtelnet
Poland ftp.icm.edu.pl /pub/simtelnet
Portugal ftp.ip.pt /pub/simtelnet
Portugal ftp.ua.pt /pub/simtelnet
Romania ftp.sorostm.ro /pub/simtelnet
Slovenia ftp.arnes.si /software/simtelnet
South Africa ftp.is.co.za /pub/simtelnet
South Africa ftp.sun.ac.za /pub/simtelnet
South Korea ftp.nuri.net /pub/simtelnet
South Korea ftp.sogang.ac.kr /pub/simtelnet
Sweden ftp.sunet.se /pub/simtelnet
Switzerland nic.switch.ch /mirror/simtelnet
Taiwan ftp.ncu.edu.tw /Packages/simtelnet
Taiwan NCTUCCCA.edu.tw /PC/simtelnet
Thailand ftp.nectec.or.th /pub/mirrors/simtelnet
US, California ftp.digital.com /pub/micro/pc/simtelnet
US, Illinois uiarchive.cso.uiuc.edu /pub/systems/pc/simtelnet
US, Mass. ftp.bu.edu /pub/mirrors/simtelnet
US, Michigan oak.oakland.edu /pub/simtelnet
US, Oklahoma ftp.uoknor.edu /pub/simtelnet
US, Oregon ftp.orst.edu /pub/simtelnet
US, Virginia mirrors.aol.com /pub/simtelnet
There are a list of file to dowload (link are referred to ftp.digital.com):
To build C programs, you'll need
djdev201.zip (1502Kb) - Basically libraryes and application
gcc2721b.zip (1071Kb) - The compiler binary
bnu281b.zip (1740Kb)- various utility
For C++
gpp2721b.zip (665Kb) - The C++ compiler binaries
lgp271b.zip (623Kb)
Other stuff:
txi390b.zip (455Kb) for the online manual (info)
csdpmi3b.zip (39Kb) if you don't have a DPMI server
faq210b.zip (389Kb) - The full FAQ list
alleg22.zip - A graphics library
rhide13b.zip (1451Kb) - An integrated IDE like Borland C for DJGPP (very useful)
mak375b.zip (204Kb) - Make utility
infng100.zip - Trasform info file to norton guide database
For more informations visit the official site.
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