rchennau Posted November 1, 2010 Share Posted November 1, 2010 Team Atari: I know this is not the marketplace so sorry if this annoys folks but I'd rather post here in the hopes some of the regulars have some spare 4464 RAM chips for the Atari 600XL memory upgrade. I found a seller on eBay but figured I'd give a shout out to the folks here first. I'm looking to upgrade three of my 600XL so I need a total of 6 chips. Any givers? I'll pay shipping and some handling of course! Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted November 1, 2010 Share Posted November 1, 2010 Team Atari: I know this is not the marketplace so sorry if this annoys folks but I'd rather post here in the hopes some of the regulars have some spare 4464 RAM chips for the Atari 600XL memory upgrade. I found a seller on eBay but figured I'd give a shout out to the folks here first. I'm looking to upgrade three of my 600XL so I need a total of 6 chips. Any givers? I'll pay shipping and some handling of course! I _May_ have some... let me look around tonight Quote Link to comment Share on other sites More sharing options...
russg Posted November 1, 2010 Share Posted November 1, 2010 Team Atari: I know this is not the marketplace so sorry if this annoys folks but I'd rather post here in the hopes some of the regulars have some spare 4464 RAM chips for the Atari 600XL memory upgrade. I found a seller on eBay but figured I'd give a shout out to the folks here first. I'm looking to upgrade three of my 600XL so I need a total of 6 chips. Any givers? I'll pay shipping and some handling of course! I _May_ have some... let me look around tonight Bill Garber over at comp.sys.atari.8bit pointed me to: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41574_-1 I ordered two of them and they worked just fine. They are $1.69 each plus ship and handling. I believe it was a $5.00 charge for less than $10 order or something like that. These were the 41464-10 type 18 double inline chips. Quote Link to comment Share on other sites More sharing options...
OldAtarian Posted November 1, 2010 Share Posted November 1, 2010 Team Atari: I know this is not the marketplace so sorry if this annoys folks but I'd rather post here in the hopes some of the regulars have some spare 4464 RAM chips for the Atari 600XL memory upgrade. I found a seller on eBay but figured I'd give a shout out to the folks here first. I'm looking to upgrade three of my 600XL so I need a total of 6 chips. Any givers? I'll pay shipping and some handling of course! I _May_ have some... let me look around tonight Bill Garber over at comp.sys.atari.8bit pointed me to: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41574_-1 I ordered two of them and they worked just fine. They are $1.69 each plus ship and handling. I believe it was a $5.00 charge for less than $10 order or something like that. These were the 41464-10 type 18 double inline chips. Is there an installation guide somewhere? Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted November 1, 2010 Share Posted November 1, 2010 (edited) as per http://www.atarimax.com/freenet/freenet_material/12.AtariLibrary/2.MiscellaneousTextFiles/showarticle.php?108 You will need the follow parts to perform this mod: (2) 4464 RAM chip, 64Kx4, 150ns or faster. Additionally, you will need chip pullers, a soldering iron, and 3 small pieces of wire. I used wire wrap wire when I did this mod. If the chips on your 600XL are socketed, you're in luck, otherwise, you need to first unsolder the following chips: (1) 74S32 location U18 (2) 74LS158 locations U5 and U6 (2) 4416 locations U11 and U12 and put sockets on the mother board in their place to make the job easier. Now bend up pin 9 on the 74S32, and put it back in its socket on the mother board. Bend up pin 3 on the 74LS158 in location U5, and put it back in its socket. Also, bend up pin 10 on the 74LS158 in location U6, and put that chip back into its socket. The last two chips you need to change are the two RAM chips. Put the 4464 chips into the sockets at locations U11 and U12 on the motherboard. Now you need to install 3 wires to complete the mod. The first wire should be connected between pin 3 of the 74LS158 at location U5, and pin 20 of the parallel bus on the 600XL. The second wire should be connected between pin 10 of the 74LS158 at location U6, and pin 18 of the parallel bus. The third wire connects between pin 9 of the 74S32 at location U18, and pin 45 on the parallel bus. That's all there is to it. Edited November 1, 2010 by orpheuswaking Quote Link to comment Share on other sites More sharing options...
+orpheuswaking Posted November 1, 2010 Share Posted November 1, 2010 (edited) The mod I did is exactly the same as above, although I didn't run lines to the PBI bus, I taped into traces on the board... this is the version I use, it's the same thing, just different points are used on the board http://atari.a8maestro.com/info/8ball/memory/600xl64k.txt Edited November 1, 2010 by orpheuswaking Quote Link to comment Share on other sites More sharing options...
Oliver Posted January 11, 2011 Share Posted January 11, 2011 (edited) Hi everyone, I have just carried out this mod on my 600XL. I bought a couple of Hitachi HM50464P-12 RAM ic`s from a very nice guy on ebay. If you PM me i`ll give his contact details. Once fitted and the wiring mod carried out I found I now had 37902 bytes free and can run all software! I am now daily using my 600Xl so as to keep down the wear and tear on my 800XL`s. What a great mod. Oliver Edited January 11, 2011 by Oliver Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 8, 2011 Share Posted February 8, 2011 Anyone got any spare 4464/41464 RAMs in the UK? I have another 600XL to upgrade. Quote Link to comment Share on other sites More sharing options...
carmel_andrews Posted February 8, 2011 Share Posted February 8, 2011 Anyone got any spare 4464/41464 RAMs in the UK? I have another 600XL to upgrade. Don't farnells or RS/Maplins still do those ram chips if not there's a place in edgware road (nr maida vale) called henry's (lots of old school electronic bits and pieces in there, sorry, i dunno if they've got a website, but it's been a while since i trekked into their shop) Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 8, 2011 Share Posted February 8, 2011 Don't farnells or RS/Maplins still do those ram chips if not there's a place in edgware road (nr maida vale) called henry's (lots of old school electronic bits and pieces in there, sorry, i dunno if they've got a website, but it's been a while since i trekked into their shop) I can't see Maplin selling them, and I'd have to spend thirty quid at Farnells or RS. It's a few years since I've been down the Edgware Road, and sadly it's quite a trek for me (about 350 miles!). I just found a couple of chips on eBay, fortunately. Quote Link to comment Share on other sites More sharing options...
svenski Posted February 8, 2011 Share Posted February 8, 2011 Slightly off-topic but is it still possible to source RAM to use as a direct replacement for the 800XL from RS or Farnell? Quote Link to comment Share on other sites More sharing options...
Syfo-Dyas Posted February 8, 2011 Share Posted February 8, 2011 (edited) What do you think this is? The Market Place?!?! Sloopy just so happens to be doing this to one of my 600XL's right now. Edited February 8, 2011 by Syfo-Dyas Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 9, 2011 Share Posted February 9, 2011 (edited) What we need is a DIY guide for people to add a 1 Meg SIMM to the various machines. Fairly sure it's just a case of connect the 8 needed address lines, 8 data, Cas, Ras, OE, +5, GND, and ground the unused address lines for most, it only gets more complex when you're dealing with the >64K configurations. Edited February 9, 2011 by Rybags Quote Link to comment Share on other sites More sharing options...
russg Posted February 9, 2011 Share Posted February 9, 2011 (edited) Team Atari: I know this is not the marketplace so sorry if this annoys folks but I'd rather post here in the hopes some of the regulars have some spare 4464 RAM chips for the Atari 600XL memory upgrade. I found a seller on eBay but figured I'd give a shout out to the folks here first. I'm looking to upgrade three of my 600XL so I need a total of 6 chips. Any givers? I'll pay shipping and some handling of course! I _May_ have some... let me look around tonight Bill Garber over at comp.sys.atari.8bit pointed me to: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_41574_-1 I ordered two of them and they worked just fine. They are $1.69 each plus ship and handling. I believe it was a $5.00 charge for less than $10 order or something like that. These were the 41464-10 type 18 double inline chips. Is there an installation guide somewhere? 64k_upgrade_600xl-1.txt Edited February 9, 2011 by russg Quote Link to comment Share on other sites More sharing options...
Syfo-Dyas Posted February 9, 2011 Share Posted February 9, 2011 What we need is a DIY guide for people to add a 1 Meg SIMM to the various machines. Fairly sure it's just a case of connect the 8 needed address lines, 8 data, Cas, Ras, OE, +5, GND, and ground the unused address lines for most, it only gets more complex when you're dealing with the >64K configurations. That would be grand, sounds simple enough, though I wonder if I could pull it off without screwing everything up again. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 9, 2011 Share Posted February 9, 2011 What we need is a DIY guide for people to add a 1 Meg SIMM to the various machines. Fairly sure it's just a case of connect the 8 needed address lines, 8 data, Cas, Ras, OE, +5, GND, and ground the unused address lines for most, it only gets more complex when you're dealing with the >64K configurations. I'd love a simple guide on how to fit 1MB to a 600/800XL or 1200XL. Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 9, 2011 Share Posted February 9, 2011 I'm tempted to just try it on an XEGS to see how it goes. Just replacing the base 64K would be easy enough, but making a 130XE or better workalike would be where it gets tricky. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 9, 2011 Share Posted February 9, 2011 I'm tempted to just try it on an XEGS to see how it goes. At least that way, if it goes wrong, you've lost nothing. Quote Link to comment Share on other sites More sharing options...
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