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From: dkim@wam.umd.edu (Daeshik Kim)
Newsgroups: comp.lang.c
Subject: Re: 2 Turbo C questions
Keywords: C, Turbo C
Message-ID: <1990Mar22.064223.8638@wam.umd.edu>
Date: 22 Mar 90 06:42:23 GMT
References: <6548@orca.wv.tek.com>
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Reply-To: dkim@wam.umd.edu (Daeshik Kim)
Organization: Univ. of Md, College Park
Lines: 30


	For the first ques.,

/* check your video controller satus */
char *sptr;

	sptr = (char*) 0x410L;

/* let's assume CGA */
char *charbase;

	charbase = (char*) 0xb8000000L;

charin(c, attr, x, y)
int c,attr,x,y;
{
	charbase[x*2+y*160] = c;	/* map char to video-mem */
	charbase[x*2+y*160+1] = attr;	/* map color attr. */
	return;
}

	This is just an example on CGA.
	You have to check the *sptr to find the right video-type.

	If it's either ega or vga, it's easier to use asm. than c.
	due to the color attr. mapping.
--
	Daeshik Kim	H: (301) 445-0475/2147 O: (703) 689-5878
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