cvs.gedasymbols.org/archives/browse.cgi | search |
From: | "Michael Stewart" <mike AT reggin DOT freeserve DOT co DOT uk> |
Newsgroups: | comp.os.msdos.djgpp |
Subject: | Re: putpixel method |
Date: | Tue, 1 Jun 1999 08:58:31 +0100 |
Organization: | (Posted via) Netcom Internet Ltd. |
Lines: | 28 |
Message-ID: | <7j03kl$7ef$1@taliesin.netcom.net.uk> |
References: | <12907576 DOT 928170590243 DOT JavaMail DOT w-epost AT localhost> <375331E2 DOT 65A7180A AT cartsys DOT com> <37533712 DOT 2CB224D2 AT hitech DOT net DOT au> |
NNTP-Posting-Host: | hgty.capgemini.co.uk |
X-Trace: | taliesin.netcom.net.uk 928223701 7631 194.42.240.2 (1 Jun 1999 07:55:01 GMT) |
X-Complaints-To: | abuse AT corp DOT netcom DOT net DOT uk |
NNTP-Posting-Date: | 1 Jun 1999 07:55:01 GMT |
X-Newsreader: | Microsoft Outlook Express 4.72.3155.0 |
X-MimeOLE: | Produced By Microsoft MimeOLE V4.72.3155.0 |
To: | djgpp AT delorie DOT com |
DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
Reply-To: | djgpp AT delorie DOT com |
leroy wrote in message <37533712 DOT 2CB224D2 AT hitech DOT net DOT au>... >Nate Eldredge wrote: > >> Writing to video memory is not risky per se; the risk comes if you miss >> and write to some other kind of memory :) In the above example, it >> might be wise (while debugging) to check that y < 200 and x < 320, and >> that you have the right number of zeros in 0xA0000. >> -- > >Isn't it 0xA000, only 3 zero's. Thats the address I always write to and it >works. It is 0xa0000 In a real mode program you would access segment 0xa000 offset 0x0000, but to convert that value to a pmode offset (?) you would do this offset = segment * 16 + offset Which in the above example is 0xa0000. I think this is documented in the FAQ. >The irony of it is pretty funny though. > >Cheers, > >leroy.
webmaster | delorie software privacy |
Copyright © 2019 by DJ Delorie | Updated Jul 2019 |