MrMartian Posted September 13, 2007 Share Posted September 13, 2007 Finally! I've gotten all the bugs out of this thing. What I've made is a one-chip expansion memory controller for XL computers (and XEGS once I figure out how to wire it in!) that provides a connection to a 1M SIMM. You get two modes, one is XE compatible separate ANTIC/CPU banking control of 512K, and the other is the full 1M, but CPU and ANTIC see the same memory. As soon as I write up the instruction on how to wire it in, I'll post it for all to enjoy. It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. I've tested it with ramdisks in MyDOS and SpartaDOS, and the VidBlitz demo (shown) and Fandal's .XEX conversion of some of the XE games. If you'd like me to test any other software, let me know what it is! Here are some pictures! Quote Link to comment Share on other sites More sharing options...
+warerat Posted September 13, 2007 Share Posted September 13, 2007 Nice work! Quote Link to comment Share on other sites More sharing options...
+Larry Posted September 13, 2007 Share Posted September 13, 2007 Nice job- Could you post a larger picture of the open 1200XL so as to better see the wiring details? -Larry Quote Link to comment Share on other sites More sharing options...
dinosaur Posted September 13, 2007 Share Posted September 13, 2007 Hello! Could you post the extended memory check program,please? Thanks. Quote Link to comment Share on other sites More sharing options...
MrMartian Posted September 13, 2007 Author Share Posted September 13, 2007 Nice job-Could you post a larger picture of the open 1200XL so as to better see the wiring details? -Larry Here's the full resolution image: http://www.isle.ca/atari/DSC01601.JPG Quote Link to comment Share on other sites More sharing options...
MrMartian Posted September 13, 2007 Author Share Posted September 13, 2007 Hello! Could you post the extended memory check program,please? Thanks. It's Satantronic's XRAM, available here: http://satantronic.atari.sk/news.htm Quote Link to comment Share on other sites More sharing options...
dinosaur Posted September 14, 2007 Share Posted September 14, 2007 Maximum Thanks! Quote Link to comment Share on other sites More sharing options...
Rybags Posted September 14, 2007 Share Posted September 14, 2007 (edited) I'd love one. I've even saved the SIMM sockets from an old motherboard specifically for this type of upgrade. What demo/program is that first image? Edited September 14, 2007 by Rybags Quote Link to comment Share on other sites More sharing options...
+warerat Posted September 14, 2007 Share Posted September 14, 2007 What demo/program is that first image? That's the (in)famous ANTIC-banked Video Blitz page-flipper demo.... Quote Link to comment Share on other sites More sharing options...
+warerat Posted September 14, 2007 Share Posted September 14, 2007 It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. Out of curiosity, did you use WinCUPL to compile your design? I've never used the ATF750C familiy with the embedded flip-flops-- I always instinctively stuck to the ATF16V8/ATF20V8 families for smaller combinatorial designs. I always thought the Atmel design software was clunky and kind of Windows 3.1 looking. Not to mention I could never quite figure out to how get the simulations to run right and sometimes I'd get funny compile errors. Quote Link to comment Share on other sites More sharing options...
+Guitarman Posted September 14, 2007 Share Posted September 14, 2007 It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. What do you use to program a ATF750C series?? Is it a special writer or can it be done with a eprom burner?? New to this one. Quote Link to comment Share on other sites More sharing options...
MrMartian Posted September 14, 2007 Author Share Posted September 14, 2007 It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. Out of curiosity, did you use WinCUPL to compile your design? I've never used the ATF750C familiy with the embedded flip-flops-- I always instinctively stuck to the ATF16V8/ATF20V8 families for smaller combinatorial designs. I always thought the Atmel design software was clunky and kind of Windows 3.1 looking. Not to mention I could never quite figure out to how get the simulations to run right and sometimes I'd get funny compile errors. Yeah, I did use WinCUPL. And, yeah, it's a little painful to use. It's been 10+ years since I last developed a PLD design, and at first I tried to use the copy of Abel 3.0 I had from back then... DOS in all it's glory (?!?!).. I tried it in a 22V10, but I needed the internal registers, otherwise I was short one pin! So, off to a CPLD, and what I had didn't work. WinCUPL is free, so I gave it a whirl. Seems to work okay, but many many many many bugs.. Ah well. Quote Link to comment Share on other sites More sharing options...
MrMartian Posted September 14, 2007 Author Share Posted September 14, 2007 It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. What do you use to program a ATF750C series?? Is it a special writer or can it be done with a eprom burner?? New to this one. You can't use a programmer than only support EPROMS. Most universal programmers will support PLDs as well, just make sure you see ATF750C. My old one didn't, so part of getting this going was buying a new programmer! Quote Link to comment Share on other sites More sharing options...
MEtalGuy66 Posted September 30, 2007 Share Posted September 30, 2007 So when are you gonna release the jedec code and/or offer the pre-programmed PLD? Quote Link to comment Share on other sites More sharing options...
Xebec's Demise Posted October 1, 2007 Share Posted October 1, 2007 Finally! I've gotten all the bugs out of this thing. What I've made is a one-chip expansion memory controller for XL computers (and XEGS once I figure out how to wire it in!) that provides a connection to a 1M SIMM. You get two modes, one is XE compatible separate ANTIC/CPU banking control of 512K, and the other is the full 1M, but CPU and ANTIC see the same memory. As soon as I write up the instruction on how to wire it in, I'll post it for all to enjoy. It uses an Atmel ATF750C CPLD, and you can download the JED file if you can program one yourself (or have a friend who can), or I will be selling programmed chips as well.. I've tested it with ramdisks in MyDOS and SpartaDOS, and the VidBlitz demo (shown) and Fandal's .XEX conversion of some of the XE games. If you'd like me to test any other software, let me know what it is! Here are some pictures! If anyone wants to try this upgrade, or any other, I have a whole large box full of SIMMs, like 50 lbs, from my computer hardware days. If you need some, I could ship them to you. Quote Link to comment Share on other sites More sharing options...
MrMartian Posted October 2, 2007 Author Share Posted October 2, 2007 So when are you gonna release the jedec code and/or offer the pre-programmed PLD? Many many apologies! Too much work and not enough Atari makes me forget what I have to finish ... http://www.isletech.net/atari I am still writing up information on wiring, but that's the start.. Quote Link to comment Share on other sites More sharing options...
JokerCPoC Posted December 20, 2007 Share Posted December 20, 2007 Nice job-Could you post a larger picture of the open 1200XL so as to better see the wiring details? -Larry Here's the full resolution image: http://www.isle.ca/atari/DSC01601.JPG Ok MrMartian, Um what's up with the link Doc? I get a 404 error when I click on It. I'm looking at getting a 600XL and providing It with 64k and an S-video output soon, among other long term goals in addition to XE ram compatibility maybe, the SIO2SD(I like flash drives), a 5.25" fdd(Indus GT or 1050 w/doubler?) and eventually the Ape Warp 32-1 OS too. Quote Link to comment Share on other sites More sharing options...
timofonic Posted December 20, 2007 Share Posted December 20, 2007 I have an Atari 600XL and would like to use this mod. It will be possible? I see a lot of wires and seems a bit difficult to do, do you plan to do a PCB for easier installing? Quote Link to comment Share on other sites More sharing options...
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