From:	"Ben Peddell" <killer DOT lightspeed AT bigpond DOT com>
Newsgroups:	comp.os.msdos.djgpp
References:	<10780N882 AT web2news DOT com> <3E20E6CD DOT 470D12B3 AT yahoo DOT com DOT au> <10943N098 AT web2news DOT com> <3e2234ce DOT 1638784 AT news DOT voyager DOT net> <11146N880 AT web2news DOT com>
Subject:	Re: VGA DAC programming
Lines:	17
X-Priority:	3
X-MSMail-Priority:	Normal
X-Newsreader:	Microsoft Outlook Express 5.00.2615.200
X-MimeOLE:	Produced By Microsoft MimeOLE V5.00.2615.200
Message-ID:	<FWPU9.23765$jM5.63384@newsfeeds.bigpond.com>
Date:	Tue, 14 Jan 2003 18:43:50 +1000
NNTP-Posting-Host:	144.134.89.18
X-Trace:	newsfeeds.bigpond.com 1042533157 144.134.89.18 (Tue, 14 Jan 2003 19:32:37 EST)
NNTP-Posting-Date:	Tue, 14 Jan 2003 19:32:37 EST
Organization:	Telstra BigPond Internet Services (http://www.bigpond.com)
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

1) BASIC "SCREEN 10" is BIOS "INT 0x10/AX=0x000F"
2) After writing to the ATC (Attribute Controller), you must re-enable Video
access by outing 0x20 to 0x3C0, then inputting from either 0x3C0 or 0x3DA.

Joel_S <jbs30000 DOT news DOT invalid AT web2news DOT net> wrote in message
news:11146N880 AT web2news DOT com...
> Great, I'll give it a try.  Thanks.
> I used the SCREEN command from a Basic compiler, and checked out all of
> the registers (Graphics, Sequencer, CRT, and so on) and then compared
> them with register values after using BIOS interrupt 0x10 and found
> differences in register 0x3C0, but when I tired to change those specific
> values, then I couldn't write to the screen.
> Anyway, I'll try your code and see what happens.  Thanks again.
> --
> Posted via http://web2news.com the faster web2news on the web

- Raw text -