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From: wrd@tekigm2.UUCP (Bill Dippert)
Newsgroups: net.micro.atari
Subject: Re: 256K 800XL Conversion updates
Message-ID: <281@tekigm2.UUCP>
Date: Sat, 23-Nov-85 13:16:46 EST
Article-I.D.: tekigm2.281
Posted: Sat Nov 23 13:16:46 1985
Date-Received: Sat, 30-Nov-85 01:10:07 EST
References: <467@imsvax.UUCP>
Organization: Tektronix, Beaverton OR
Lines: 91

> 
>     Judging from the responses I've seen on the Net, a number of us
> are having similiar problems/interests.  Since a 256KXL is of
> particular interest and has exciting possibilities,  I suggest that
> those individuals interested form a Users Group of our own.  I will
> be willing to act as a clearinghouse for information.  It is to our
> mutual interests to share whatever associated information/software
> that we can obtain.  My address is
> 
>     Bob Burch
>     6609 Charles Dr.
>     Mt. Airy, MD  21771
> 
> >Further news: they haven't yet made a 256K 1200XL, but they've opened one
> >up and said it can be done........(etc.)
> >
> >yes the mod works... be careful when assembling the code
> 
> Please enlighten us!!!	Given recent Net articles and what has been
> written above, what is it that you did that allows the mod to work?
> Are we talking the same "mod"?  Did you do anything special?  Was the
> upgrade completely successful for you?	We would appreciate your
> insight.
> 
> >We have been shipping the 256KXL for a couple of weeks and no problems
> >have been noted.  It makes the 800XL look exactly like a 130XE except that
> >bits 5 and 6 of $D301 have been redefined to address twice as much memory.
> 
> Who are "we"?  Can you please explain the theory of the bit-usage of
> PORTB ($D301) and the significance of its use.	Also, how can a given
> bank be directed to the upper or lower 32K when swapped in?
> 
> Whatever info. I get I'll try to pass along.
> 
> In article <DYOUNG@USC-ISID.ARPA (C. David Young) writes:
> 
> >...I just finished souping up the ramdisk handlers in OMNIVIEW XL/XE
> >to treat the extra RAM in our 256K upgrade for the 800XL....
> 
> Also, in a following article C David Young writes:
> 
> >That 256K RAM upgrade in BYTE was a real dog.	We have got a 256K upgrade
> >(256KXL) that will make your 1200 130 compatible. You can buy it without
> >RAM for $50 or with for $100.	The reason that the BYTE upgrade is such a
> >dog is that it ends up including the stack in the bank switch area.
> 
> Hurray for Dave!!!!!  Can we purchase just the software you've created for
> this upgrade?  If so, where can we order?  Or, can you pass along the
> patches necessary to kick-start the BYTE "dog" that us suckers have
> fallen for.  It is wonderful to know that we are not without
> alternatives in this situation.
> 
> >Please copy me in all answers, Thanks
> 
> Consider yourselves copied.  We would appreciate any experiences you've
> had in this matter, thank you.
> 
> Anyway, this has been long enough.  I'm preparing a letter to
> Claus Buchholz author of "The Quarter-Meg Atari 800XL".  Any replies
> I'll post on the net.  I would appreciate any other contacts/replies.
> 
> Bob Burch
> 6609 Charles Dr.
> Mt. Airy, MD  21771
> (301) 831-7690 evenings
> 
> :Oh! He had high hopes....just remember that dam.
> :OOPS! There goes another Quarter-Meg RAM!!!!
>       -wocka-wocka-wocka-

I too am interested in all of the above -- I have deleted over 50% in the
interests of brevity.  I am interested in converting a 1200XL, 800XL and a
130XE all to 256K.  That's correct, since it only has a 90 day warrenty 
which is almost up, why not upgrade the 130XE to 256K also!!!

Please add me to any mailing list.

I am: 

Bill Dippert
c/o Tektronix, Inc.
D/S C1/775
P.O. Box 3500
Vancouver, WA 98668-3500

or by eMail:

tektronix!tekigm2!wrd

Thanks,
--Bill--