Mail Archives: djgpp/2000/08/14/11:33:31
From: | AndrewJ <luminous-is AT REMOVE DOT home DOT com>
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | Re: Newbie GFX
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Message-ID: | <k8sfps0vt8jtk1memg5s2rl56ehkf410fe@4ax.com>
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References: | <01c004b9$f4bc0ec0$ac7297d4 AT grebo>
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Date: | Mon, 14 Aug 2000 13:20:17 GMT
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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Reply-To: | djgpp AT delorie DOT com
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>Im trying to learn gfx programming in c++ but with no actual result...
>I know streams arrays and all of the basic programming but when i see a gfx
>tutorial i see all these strange words and calls ive never seen before.
>theres several links to gfx tutorial but setting mode 13 doesnt work.
>i take the example code and try to compile it with gpp but the compiler
>complains about _ax* and such not being initiated. im no expert but i
>believe thats a call to a lib i dont have or something like that. please
>help me...
Answers have already been given, so I'm going to give you some advice instead.
Rather than diving right into such a complicated matter as graphics
programming, I suggest you instead learn about the x86 architecture (its
instruction set, registers, etc), and then move on to DOS/BIOS interrupts. If
you don't know what _ax is (its the Accumulator Register), you probably
shouldn't be trying to program graphics yet.
Also keep in mind that unless a tutorial specifically states it's written for
DJGPP (or that it uses no hardware/platform/compiler dependent code), it's
probably written for a Borland or Microsoft compiler, making it (generally)
incompatible with DJGPP. Reading about real mode and protected mode probably
wouldn't hurt. ;)
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AndrewJ
"This is a wonderful answer. It's off-topic, it's incorrect, and it doesn't
answer the question." - Richard Heathfield.
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