Rybags Posted January 24, 2015 Share Posted January 24, 2015 You can part test the Ram chips before doing any other part of the upgrade - OK, only first 1/4 will be available but it at least partially verifies them. Delay line? I can't recall having to mess with that at all. Quote Link to comment Share on other sites More sharing options...
gilsaluki Posted January 25, 2015 Share Posted January 25, 2015 600xl to 64K is the easiest mod to do. the XEGS mod to 64k was not so fun. Quote Link to comment Share on other sites More sharing options...
rockdoc2010 Posted January 25, 2015 Share Posted January 25, 2015 just in case Jameco electronics jameco part number 41574 https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10001&langId=-1&productId=41574&storeId=10001&krypto=vFgRhKXJZKuM8sLfuPRmxv3tw%2BNp1UpMXfk04%2FoIeMj%2FI0Mv6tTttQ%3D%3D&ddkey=https:StoreCatalogDrillDownView 1 Quote Link to comment Share on other sites More sharing options...
rockdoc2010 Posted January 25, 2015 Share Posted January 25, 2015 600xl to 64K is the easiest mod to do. the XEGS mod to 64k was not so fun. i thought the xegs came with 64K?? Quote Link to comment Share on other sites More sharing options...
gilsaluki Posted January 26, 2015 Share Posted January 26, 2015 i thought the xegs came with 64K?? OOPS. You are correct. I mean to upgrade the XEGS to 128K XE compatible. The XEGS board is tight and the electrical traces are very weak. Takes a real steady hand and lots of patience. Quote Link to comment Share on other sites More sharing options...
Dauber Posted July 27, 2015 Share Posted July 27, 2015 just in case Jameco electronics jameco part number 41574 https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10001&langId=-1&productId=41574&storeId=10001&krypto=vFgRhKXJZKuM8sLfuPRmxv3tw%2BNp1UpMXfk04%2FoIeMj%2FI0Mv6tTttQ%3D%3D&ddkey=https:StoreCatalogDrillDownView I ordered this and noticed that on both the top and bottom rows of pins that they're a pin short. Which way should I put the chips in -- open pin socket on the left or right?? Quote Link to comment Share on other sites More sharing options...
Roydea6 Posted July 27, 2015 Share Posted July 27, 2015 18 pin socket should take an 18 pin chip.. Pin one to the left from space bar side.. Quote Link to comment Share on other sites More sharing options...
Dauber Posted July 27, 2015 Share Posted July 27, 2015 So you're saying I can't use the 16-pin one that the link actually directs to? Quote Link to comment Share on other sites More sharing options...
BillC Posted July 27, 2015 Share Posted July 27, 2015 So you're saying I can't use the 16-pin one that the link actually directs to? The linked web-page states that the ICs are 18-pin DIP, if the ones you received only have 16 pins then Jameco made a mistake. What are the markings on the chips? Quote Link to comment Share on other sites More sharing options...
Dauber Posted July 27, 2015 Share Posted July 27, 2015 KM4164A-15 450 KOREA Quote Link to comment Share on other sites More sharing options...
AtariGeezer Posted July 27, 2015 Share Posted July 27, 2015 So you got the 4164A-15 when you should have got the 41464-10... Quote Link to comment Share on other sites More sharing options...
Dauber Posted August 4, 2015 Share Posted August 4, 2015 (edited) (deleted for ignorance) But I got the right RAM chips now. Edited August 4, 2015 by Dauber Quote Link to comment Share on other sites More sharing options...
rockdoc2010 Posted April 19, 2016 Share Posted April 19, 2016 gonna try once again on this mod. I have a few spare multiplexor chips and the board is already worked once.. perhaps i could buy a 64k unit from Beetle Quote Link to comment Share on other sites More sharing options...
a8maestro Posted April 22, 2016 Share Posted April 22, 2016 This is my drawing of the upgrade... http://atari.a8maestro.com/info/8ball/memory/600xl64k.jpg. Rick Quote Link to comment Share on other sites More sharing options...
RodLightning Posted April 25, 2016 Share Posted April 25, 2016 Foto Instructions translated from Polish to English: 1. Remove the chip U18 ( 74S32) and insert jumper between holes on pins 8 and 10. 2. Remove chips U5 and U6 ( 74LS158 ) . Bend the pins : pin 3 of U5 , U6 to the pin 10. Insert chips back into place so that the bent pins do not come in contact with anything . 3. Connect pin 3 of the A14 U5 and U6 pin 10 of the A15 . Finished. This version of the upgrade most closely resembles the one I bought and installed years ago. A jumper is used on socket U18. Mine has three pins bent up above the jumper holes with 74S32 chip replaced in the socket afterwards. The two wires from U5 and U6 are instead soldered to the points pictured and highlighted in red, as per instructions from the kit I received. No puzzle there, just alternate spots on the same two traces up by the U5 socket. I am curious about the lack of a third wire coming off U18, with the jumper being used instead on that socket with three pins bent up. Also, there was no mention of resistor R36 or U16 in the upgrade kit I bought back in the 80s. I'm planning to upgrade another 600XL using the two wire + jumper method pictured. Is there any reason to avoid this particular version? Quote Link to comment Share on other sites More sharing options...
1050 Posted April 26, 2016 Share Posted April 26, 2016 (edited) Curious as to why some fly and others don't, I've looked at the schematic for the 600XL to compare it to the 800XL and they are doing things a bit different in the 600XL which may be the problem. The pair of 158s isn't wired the same and they use a different timing to multiplex in A14 and A15 which is a red flag to me - why do this part different? RodLightning - your alternate method winds up being the same as other versions, it's just done differently so I wouldn't avoid it, especially if it works. Lifted resistor doesn't need lifting with the jumper used in the 74S32 chip socket but wire size for the jumper has to be pretty close to perfect match with chip pin width I would think. Avoid that issue by soldering the jumper onto the bottom of the socket pins and you get rid of connection problems at the same time. Edit - so now I see the three pins bent up and never mind about soldering the underside, jumper has the socket all to itself there. Edited April 26, 2016 by 1050 1 Quote Link to comment Share on other sites More sharing options...
rockdoc2010 Posted April 28, 2016 Share Posted April 28, 2016 both the 64k and the 'Jeff Popp' version of the AV mod can be done in about an hour or so, there is another AV mod for the 600XL, and that can be done with 64k mod in about 30-35mins... and every 600XL i have seen the AV mod can be done, but there is a 600XL version it cant be done (easily) on, and i have only known of ONE of these machines in all my years with atari... sloopy. 2,659 posts If it aint broke, fix it anyway! Location:Houston, TX, USA Sent Today, 2:38 PM Hahah. Wow. Where'd you dig up that artifact? ok. First, Yeah thats a standard PORTB banked upgrade.. You cant use that in the same machine along with Ultimate 1meg., Second, theres no way in hell, in this day & age, I'd build a 256k upgrade using 256k x 1bit drams. Especially if you intend to install other upgrades on the same machine. Third, thats 64k base, plus 192k extended.. Basically like a Rambo XL or Newell 256k in an 800XL. Most things these days expect the "XE style" extended ram denominations.. eg. 320k, 576k, 1088k.. Not the XL (256, 512, 1024) ones.. You know what makes a damn good 600XL upgrade? Go ahead and do the standard 64k upgrade, and then do Hias's 576k SRAM upgrade. Its a single 512K SRAM chip, piggybacked on top of your OS ROM, a single 20 pin GAL, and about 12-wires to hook it up. Gives you true 130XE compatability (including separate antic/cpu access to extended ram, which that POOP upgrade doesn't so its not truly 130xe compatible), 576k (512k extended) ram, and if you install a switch, you can flip between 64k/320k/576k modes.. my original.. Jeff Poop 256k upgrade.. for your perusal.. Attached Files p1.pdf 237.4KB 1 downloads p2.pdf 479.41KB 1 downloads p3.pdf 420.35KB 1 downloads p4.pdf 127.85KB 1 downloads p5.pdf 305.43KB 0 downloads Sounds like this old school thing wont work for what we want.. just sayin' Douglas Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted April 28, 2016 Share Posted April 28, 2016 I think you will find it's Popp, not Poop 1 Quote Link to comment Share on other sites More sharing options...
RodLightning Posted April 28, 2016 Share Posted April 28, 2016 ok. First, Yeah thats a standard PORTB banked upgrade.. You cant use that in the same machine along with Ultimate 1meg., Douglas, Which one is the standard PORTB upgrade and how is it incompatible with Ultimate 1mb? There is a lot of confusing info scattered around the internet about XL memory upgrades, and I'm curious. Quote Link to comment Share on other sites More sharing options...
Panther Posted April 29, 2016 Share Posted April 29, 2016 If you plan to install a U1MB then you only need to do the basic 64K upgrade. With U1MB installed only the first 64K of onboard memory gets used. Quote Link to comment Share on other sites More sharing options...
Beetle Posted April 30, 2016 Share Posted April 30, 2016 (edited) I made the 64k upgrade to my "empty" 600XL, too. You have to look close to see the wires. Oh, and btw, i use solder with less flux now. That job was done like 5 years ago. Edited April 30, 2016 by Beetle 1 Quote Link to comment Share on other sites More sharing options...
joelm Posted May 11, 2016 Share Posted May 11, 2016 (edited) Multiple post Edited May 11, 2016 by joelm Quote Link to comment Share on other sites More sharing options...
joelm Posted May 11, 2016 Share Posted May 11, 2016 So, I'm not sure where I went wrong. I installed the 64k upgrade in my 600XL but the memory test only shows 48K and 48K games on floppy won't load (Beach Head) says "48K RAM not available, please rectify". Everything works fine except it acts like it's still only 16K when turned on, except the memory test which shows 48K as I mentioned above. Quote Link to comment Share on other sites More sharing options...
Panther Posted May 11, 2016 Share Posted May 11, 2016 It's difficult for me to tell, but are the pins on the 74LS158s removed from the sockets? Quote Link to comment Share on other sites More sharing options...
joelm Posted May 11, 2016 Share Posted May 11, 2016 (edited) Yes, they are. Strangely, they were bent out and pre-jumpered to pins 4&5 on the R8323 chip when I opened up the computer for the first time. I've never seen that variation before but I tested it after removing those jumpers and it worked fine so I proceeded with the 64K upgrade. Edited May 11, 2016 by joelm Quote Link to comment Share on other sites More sharing options...
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