Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!decwrl!sgi!cdp!nota
From: nota@cdp.UUCP
Newsgroups: comp.sys.amiga
Subject: XT-Memory on Amiga side
Message-ID: <936700022@cdp>
Date: 8 Jan 91 22:58:00 GMT
Lines: 34
Nf-ID: #N:cdp:936700022:000:1689
Nf-From: cdp.UUCP!nota    Jan  8 14:58:00 1991


It was a lot messages with questions about
how to use XT-bridge board memory on Amiga side.
The answer is very simple:
   You need to use "addmem" program to add XT-memory.
   "addmem" takes two parameters: start-address, and end-address, as usual
   it is: 200000 and 2a0000 addresses, but you can check your XT memory
   physical adoeresses by using any debugging tools with allows to examine
   memory.
   example:
        addmem 200000 2a0000
   If you haven't this program I can send hex dump of this program
   (it is very small)... 
 About VGA mode:
   There are DFF1C0 - DFF1FF new FatAgnus registers.
   I don't have any information about these registers.
   If some one know pls give me know.
   But I know exactly that if you put 0 value to
   register DFF1DC you will turn your Amiga in NTSC mode,
   if you put 20 value you will get PAL mode...
   example:
       move.w.#00,$DFF1DC     -  NTSC
       move.l.#$20,DFF1DC     -  PAL
   if you have VGA monitor you can try 10,20,30,40 and so on values,
   one of these turns vga mode. I didn't test it because I haven't
   VGA monitor.
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| Sergei V. Polonski  MOSCOW USSR               |Next cube,Amiga,      |  
| Phone voice: 07 (095) 335-98-46               |Macintosh IIcx owner. |
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