Dropcheck Posted June 30, 2016 Share Posted June 30, 2016 (edited) Back in 1989-1991 Ralif David developed a cartridge/pcb combo eprom burner. This burner is able to burn 2764-27512 eproms as well as the Cmos versions as well. The burner is designed for Atari XL/XE computers. I don't know if it will work on the 1200XL mainly due to the nature of the cartridge board. If someone has the original design and a 1200XL please check it out. Klaus Peters offered it for sale in Germany for awhile. Very few found their way to the US. In the intervening years ABBUC aquired the rights to the product. I discovered this little known gem months ago while researching the Super E Burner. Through correspondence with GoodbyteXL and ABBUC officials I obtained permission to reimage and sell the product. Now I know there are tons of modern eprom burners that will do more and do it for less, but this is one of the few that connected to and used the Atari 8bit computer. My version has a few minor enhancements such as bypass capacitors on the chips and ZIF and a few minor cosmetic changes. The board is a little smaller than the original. I am attempting to add the ability to burn 2732 Eproms, that would be the main major enhacement. I have some test eproms coming in the next few weeks and we'll see if that is possible. I also will look at designing a 3d printable case for the main board for those who can and want to case the main board. Otherwise rubber feet will be provided much like the original had. The one major problem is the board uses (2) 6520 chips. Now they are getting harder and harder to come by. The initial offering of 10 boards will come populated, but after that I may have to offer the board without the PIAs unless an economical solid source is found. The cost will be reduced of course. I am also considering going partially SMD. This will allow me to use a R65C21 instead of the R6520. They are a little more available. But here's what it would look like. Keep in mind that the finished board is bound to be a bit different. But this will give you an idea. Cost will be $50.00 per board set plus shipping. In US 1 board set Priority Mail Flat Rate = $7.00 Outside US 1 board set International First Class Parcel = $22.00 (Horrible price!) This will be a small run. The first run of 10 will be complete boards. Additional board runs may not have the PIA chips installed. Otherwise they should be complete. For each board set sold I will donate $1 to ABBUC. Also ABBUC members will recieve a 10% discount. What's the interest level? Edited June 30, 2016 by Dropcheck 5 Quote Link to comment Share on other sites More sharing options...
Timothy Kline Posted June 30, 2016 Share Posted June 30, 2016 Back in 1989-1991 Ralif David developed a cartridge/pcb combo eprom burner. This burner is able to burn 2764-27512 eproms as well as the Cmos versions as well. The burner is designed for Atari XL/XE computers. I don't know if it will work on the 1200XL mainly due to the nature of the cartridge board. If someone has the original design and a 1200XL please check it out. Klaus Peters offered it for sale in Germany for awhile. Very few found their way to the US. In the intervening years ABBUC aquired the rights to the product. I discovered this little known gem months ago while researching the Super E Burner. Through correspondence with GoodbyteXL and ABBUC officials I obtained permission to reimage and sell the product. Now I know there are tons of modern eprom burners that will do more and do it for less, but this is one of the few that connected to and used the Atari 8bit computer. My version has a few minor enhancements such as bypass capacitors on the chips and ZIF and a few minor cosmetic changes. The board is a little smaller than the original. I am attempting to add the ability to burn 2732 Eproms, that would be the main major enhacement. I have some test eproms coming in the next few weeks and we'll see if that is possible. I also will look at designing a 3d printable case for the main board for those who can and want to case the main board. Otherwise rubber feet will be provided much like the original had. The one major problem is the board uses (2) 6520 chips. Now they are getting harder and harder to come by. The initial offering of 10 boards will come populated, but after that I may have to offer the board without the PIAs unless an economical solid source is found. The cost will be reduced of course. I am also considering going partially SMD. This will allow me to use a R65C21 instead of the R6520. They are a little more available. But here's what it would look like. Keep in mind that the finished board is bound to be a bit different. But this will give you an idea. Cost will be $50.00 per board set plus shipping. In US 1 board set Priority Mail Flat Rate = $7.00 Outside US 1 board set International First Class Parcel = $22.00 (Horrible price!) This will be a small run. The first run of 10 will be complete boards. Additional board runs may not have the PIA chips installed. Otherwise they should be complete. What's the interest level? I'd support such an effort, for sure!! Put me down for one, Dropcheck. ^_^ --Tim Quote Link to comment Share on other sites More sharing options...
+David_P Posted June 30, 2016 Share Posted June 30, 2016 Best Electronics is still advertising the 6520 at $1.95 each. Quote Link to comment Share on other sites More sharing options...
Dropcheck Posted June 30, 2016 Author Share Posted June 30, 2016 I'll have to check with him to see how many he will sell to one person. That is definitely an economical source if he's willing to sell 20/30 chips. Quote Link to comment Share on other sites More sharing options...
+David_P Posted June 30, 2016 Share Posted June 30, 2016 And Futurlec is advertising 6821s at $2.90 (less in quantity). http://futurlec.com/6800Series/6821pr.shtml EDIT to add: There are Chinese sellers on eBay offering 6821 around $10 for 10, shipping included. Quote Link to comment Share on other sites More sharing options...
Dropcheck Posted June 30, 2016 Author Share Posted June 30, 2016 And Futurlec is advertising 6821s at $2.90 (less in quantity). http://futurlec.com/6800Series/6821pr.shtml EDIT to add: There are Chinese sellers on eBay offering 6821 around $10 for 10, shipping included. How compatible is the 6821 to the 6500 series cpus? Quote Link to comment Share on other sites More sharing options...
IndusGT Posted June 30, 2016 Share Posted June 30, 2016 I'll take one! Quote Link to comment Share on other sites More sharing options...
GoodByteXL Posted June 30, 2016 Share Posted June 30, 2016 (edited) This burner is able to burn 2764-27512 eproms as well as the Cmos versions ... Just to add. The burner also burns ROMs, NMOS and CMOS. I use it for more than 25 years now and it is still doing fine. It is said to burn 2732 as well. Edited June 30, 2016 by GoodByteXL 2 Quote Link to comment Share on other sites More sharing options...
tuf Posted June 30, 2016 Share Posted June 30, 2016 Sign me up for one of these! Quote Link to comment Share on other sites More sharing options...
+Larry Posted June 30, 2016 Share Posted June 30, 2016 I'm in. Cool idea! Larry Did you look at the Western Design replacement? 65C21s. Iirc. Supposedly pin compatible replacement for 6520? Quote Link to comment Share on other sites More sharing options...
+MacRorie Posted June 30, 2016 Share Posted June 30, 2016 Would like one as well. Thanks Quote Link to comment Share on other sites More sharing options...
Dropcheck Posted June 30, 2016 Author Share Posted June 30, 2016 I think i've found an economical alternative to the horrible US Post Offices international mailing price. Santosp has indicated he would be willing to make the board set and mail it in the EU. Details will follow, but I suspect it will be much like the process we had with the SpartaDOS project. Shipping might be a bit higher than it was with that project, because we are looking at a bigger heavier board, but surely less than $22 plus. 3 Quote Link to comment Share on other sites More sharing options...
19Echo Posted June 30, 2016 Share Posted June 30, 2016 I'm down for one Quote Link to comment Share on other sites More sharing options...
Roydea6 Posted June 30, 2016 Share Posted June 30, 2016 Yes one for me for Santosp Work. Quote Link to comment Share on other sites More sharing options...
+Stephen Posted June 30, 2016 Share Posted June 30, 2016 I'll take one. Quote Link to comment Share on other sites More sharing options...
+sm3 Posted June 30, 2016 Share Posted June 30, 2016 I'll take one as well. Quote Link to comment Share on other sites More sharing options...
+David_P Posted June 30, 2016 Share Posted June 30, 2016 How compatible is the 6821 to the 6500 series cpus? From what I have read, 6821 and 6521 should be interchangeable. However, I have no first hand experience. Quote Link to comment Share on other sites More sharing options...
Defender II Posted June 30, 2016 Share Posted June 30, 2016 I'm in for 1. Quote Link to comment Share on other sites More sharing options...
Smokeless Joe Posted June 30, 2016 Share Posted June 30, 2016 I'll take a hit, er... I mean, one please! 1 Quote Link to comment Share on other sites More sharing options...
UNIXcoffee928 Posted June 30, 2016 Share Posted June 30, 2016 It looks great, but as an Atari 800 user, what I'd really like to see is a purchasable re-implementation of the hard-to-find product known as Aprom: http://www.atarimagazines.com/v3n4/productreviews.html Quote Link to comment Share on other sites More sharing options...
Guest Posted June 30, 2016 Share Posted June 30, 2016 please add me for ONE too thanks Quote Link to comment Share on other sites More sharing options...
1050 Posted June 30, 2016 Share Posted June 30, 2016 From what I have read, 6821 and 6521 should be interchangeable. However, I have no first hand experience.I do have first hand experience and they do work as identical. 6520 and 6821 just to tip the picture frame back to square a bit there. Some 130XE come from Atari equipped with them too. 68A21 - 1 MHz version 68B21 - 2 MHz version same as our 6520 with it's 1.78 MHz clock. Rumor has it Hitachi/Motorola purchased rights and copies of 6520 die art work from MOSTEK rather than reinvent the wheel for their 6800 line PIA. But there is a 6521 and a 6820 I see. 68B21 will be found in abundance, I already have one or two sticks of them. Put me down for at least one Lenore, and I may want two or more at the end of the day. UNIXcoffee928 -- Wow, nice find. I was not even aware that the ProBurner had a competitor until you dropped that Aprom bomb. This could take that form I would think, software to support it would need to be written of course. Walling Co. rings a bell for me - I've heard that name before. Where? Quote Link to comment Share on other sites More sharing options...
goaltoss Posted July 1, 2016 Share Posted July 1, 2016 Add me to the list as well Quote Link to comment Share on other sites More sharing options...
Gandor Posted July 1, 2016 Share Posted July 1, 2016 I am interested in one Quote Link to comment Share on other sites More sharing options...
IndusGT Posted July 1, 2016 Share Posted July 1, 2016 what is the biggest size eprom that this will burn? Thanks Quote Link to comment Share on other sites More sharing options...
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