FILE: beyond512k.sda             (R12) FROM: Recursion   10/16/89   S#: 414784        
SUBJECT: 2 Megabyte REU Conv.

TYPE:          prg
BLOCKS:        129
DOWNLOADS:     305
EST. D/L TIME: 300: 29:09 1200: 08:19 
EQUIPMENT:     17xx REU
FILES NEEDED:  GEOS & CONVERT

Here it is!!

How to expand any 512kb REU up to 2,
count'em, 2 MEGABYTES inside the REU
case!

Or, add just as much RAM as you need in
256kb increments!

Just load and run this file to de-ARC
the 3 files it contains; you will need
190 blocks of disk space. Then, boot
GEOS and use the CONVERT utility to
change the SEQ files to normal GEOS
files. Print-out the two documents, and
read carefully before you start!

If you don't have GEOS, you can send me
$5 and I'll mail copies of the
documents out to you. E-MAIL me for my
present address.

Theis project should only be done by
experienced hardware hackers!

Remember who did it first....

       ---->  Recursion  <----

 <<   PRESS F7 FOR DOWNLOAD MENU    >> 
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SUBJ: beyond512k.sda             (R)   FROM: Recursion   10/26/89   S#: 412575  
If you use IC sockets for the RAM chips (ie. expanded 1700 or 1764), you may want to remove them to leave more room to add RAM chips.

Here is a simple REU memory test that should be used in your own software. It works with all sizes of REUs! Although it is written in BASIC with a REU wedge for the C64, it can be easily converted to machine language. It returns the number of 64kb banks that are useable, which = (maximum bank number)+1.

2000 REM **** Initialize ****
2010 REM Put a single "status" byte,
2011 REM that shows an unchecked bank,
2012 REM in every possible REU bank.
2020 POKE 49152,136
2030 FOR I=0 TO 255
2040 !STASH 1,49152,0,I
2050 NEXT
2060 REM ****    Test   ****
2070 REM Test # banks present by seeing
2071 REM if bank is checked yet. If not
2072 REM then change status of bank to
2073 REM checked, and add 1  to the #
2074 REM of banks. Else, bank is
2075 REM checked already, and we're
2076 REM done!
2100 POKE 49152,27
2110 I=0
2120 !FETCH 1,49152,0,I
2130 IF PEEK(49152)<>136THEN 2190
2140 POKE 49152,27
2150 !STASH 1,49152,0,I
2160 I=I+1:IF I<256 THEN 2120
2170 REM ****    DONE   ****
2180 REM Number of banks of 64kb is now
2181 REM in I.
2190 IF I=0 THEN PRINT"REU NOT PRESENT"
2200 IF I=2 THEN PRINT"THIS IS A 1700 (128 K) REU"
2210 IF I=4 THEN PRINT"THIS IS A 1764 (256 K) REU"
2220 IF I=8 THEN PRINT"THIS IS A 1750 (512 K) REU"
2230 IF I>( THEN PRINT"THIS IS AN EXPANDED";64*I;"K REU"
   
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SUBJ: beyond512k.sda             (R)   FROM: PROGOL      10/29/89   S#: 807341  
Sounds great, now, if somebody will just create a GEOS 64/128 2.0 driver to go along with this...
Just imagine...2-1581 ram disk's.
Sounds good ?
Well ?
  
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SUBJ: beyond512k.sda             (R)   FROM: Wes256      10/30/89   S#: 789592  
This is just what I'v been looking for!! Now I have to write a ML driver prg to animate 208 full color and size koala pics from the reu to the screen!! It should yeild about 5 seconds of animation that will rival an AMIGA!
Thanks RECURSION,I'll post up my Animator64/128 when completed!!
  
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SUBJ: beyond512k.sda             (R)   FROM: DennyJ      11/04/89   S#: 448925  
what gives?  downloaded this file twice and both times the download froze at 52%  I had to knock the connection down and reboot to move along??????

is it just me?????


  
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SUBJ: beyond512k.sda             (R)   FROM: MalcolmA    11/05/89   S#: 821488  
See the latest issue of TRANSACTOR for geos support for up to 1meg ;] It may have to be adjusted here and there for this conversion, but not by much.
  
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SUBJ: beyond512k.sda             (R)   FROM: Paralogic   11/21/89   S#: 465873  
Yes, checkout Transactor article. Fantastic!!  Transactor does it again!  
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SUBJ: beyond512k.sda             (R)   FROM: JohnM112    11/26/89   S#: 15962   
What version of geos did you use?  I've got an old one and I can't get the file to print.  It is in geos mode but is to advanced to print.
  
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SUBJ: beyond512k.sda             (R)   FROM: Recursion   12/24/89   S#: 5092    
Sorry folks...

The file is in geoWRITE 2.1 format.
You'll have to have it to print it.

BUT! For a sloppy, quick fix do the following: don't CONVERT the file, and use the geowrite to cbm BASIC program converter available on q-link. It will be very messy without any formatting, but it is better than nothing!

As soon as I find a decent 80 column text editor for the c64, I'll upload the SEQ file (that anyone can read).
Any editor recommendations?????  
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SUBJ: beyond512k.sda             (R)   FROM: RaymondD2   01/06/90   S#: 826600  
Well I can say that this does work because I did it. I have 1 meg now :) I only fownd that Super Snapshot's monitor works with it Vershion 5 :) I hope some one will get GEOS to work with this. A 1581 RAM would be so nice!

  
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SUBJ: beyond512k.sda             (R)   FROM: RaymondD2   01/06/90   S#: 462098  
super snapshot V5 file copy allso works with this. I can copy a hole 1581 disk at a time!!! :)
  
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SUBJ: beyond512k.sda             (R)   FROM: Mongo2      01/13/90   S#: 811581  
I also have a one meg REU? I made alot of mistakes like not reading the whole thing thru. I am not a computer genius by all means but it does work. I found that when I wired the chips together it was easyer to cut out a half inch strip by 3 inch piece of butter dish lid plastic and thumb tack it to the work bench. I then put the foam tape on the plastic and placed the chips on it. After wiring the chips I cut the excess half inch of plastic on both end of the strip and used the double sided tape to put the chip configuration in the REU.
then I completed the rest of the connections to the REU. Doing that helped me from fumbling with the REU alot and make the job a little simpler.

  
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SUBJ: beyond512k.sda                   FROM: Boots2      01/13/90   S#: 427746  
So........some of us are not good with doing this job, who would be willing to do it for the unfortunate unexperianced hardware people.
What would the cost be?