Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!mailrus!iuvax!bsu-cs!cfchiesa
From: cfchiesa@bsu-cs.UUCP (Christopher Chiesa)
Newsgroups: comp.sys.atari.8bit
Subject: Re: 800 memory management
Summary: Only on the XL/XE !!!
Message-ID: <3740@bsu-cs.UUCP>
Date: 24 Aug 88 16:24:14 GMT
References: <2278@alliant.Alliant.COM> <4594@saturn.ucsc.edu>
Organization: CS Dept, Ball St U, Muncie, Indiana
Lines: 22

In article <4594@saturn.ucsc.edu>, sirkm@ssyx.ucsc.edu (Greg Anderson) writes:
> In article <2278@alliant.Alliant.COM> lackey@alliant.COM (Stan Lackey) writes:
> >Is there any way to get temporary access to that RAM while the cartridge
> >is plugged in?  I have a 65XE, and am aware of how it is done in XL/XE;
> >I am writing an application which uses this feature, and would like very
> >much to make it compatible with the older machine.
> 
> If a cartridge is plugged into an 8-bit Atari, it is not normally possible
> to access the RAM underneath.  The built-in BASIC ROMs can be switched out
                                     ^^^^^^^^^^^^^^^^^^^

There IS NO SUCH THING on the original 800.  Just wanted to clarify that.

> with the PORTB register at $D301.  OSS "SuperCartridges" can also be switched
           ^^^^^^^^^^^^^^^^^^^^^^^^

And on the original 800, this port is THERE, but its functions are TOTALLY 
DIFFERENT: it is connected to the third and fourth joystick/paddle controller
jacks!

-- 
UUCP: <backbones>!{iuvax,pur-ee,uunet}!bsu-cs!cfchiesa 
cfchiesa@bsu-cs.UUCP