Dionoid Posted October 11, 2018 Share Posted October 11, 2018 Hi, I have a '2600 with a faulty RIOT that I want to replace. I found some cheap R6532P's on AliExpress; are they any good to replace the broken R6532-15 RIOT? And what is the difference between a R6532P and a R6532AP? Thanks! Quote Link to comment Share on other sites More sharing options...
Osgeld Posted October 11, 2018 Share Posted October 11, 2018 I forget what the difference is but the P will work fine in a 2600 Quote Link to comment Share on other sites More sharing options...
Dionoid Posted October 11, 2018 Author Share Posted October 11, 2018 (edited) I forget what the difference is but the P will work fine in a 2600 Thanks for the info! I just ordered a R6532P from China for $2 and free shipping. For that kind of money I'm fine taking the risk :-) And I did some investigation on the R6532AP, which seems to be a 2MHz version, while the R6532P is 1MHz. Edited October 11, 2018 by Dionoid Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted October 12, 2018 Share Posted October 12, 2018 Yes. The P suffix just indicates a plastic (instead of ceramic) case. It corresponds to a traditional vintage 6532 from any of the usual manufacturers who had licensed the 65xx chipset from MOS. Quote Link to comment Share on other sites More sharing options...
Osgeld Posted October 12, 2018 Share Posted October 12, 2018 Thanks for the info! I just ordered a R6532P from China for $2 and free shipping. For that kind of money I'm fine taking the risk :-) And I did some investigation on the R6532AP, which seems to be a 2MHz version, while the R6532P is 1MHz. That was what I was thinking but didnt want to bother looking it up and yes DrVenkman is correct the P is for plastic shell (vs ceramic) , its the A vs non A that's the important part 1 Quote Link to comment Share on other sites More sharing options...
Shawn Posted October 12, 2018 Share Posted October 12, 2018 Careful ordering those 6532's from China. Some are DOA and most of them are fakes that are out of spec or just don't work at all. Quote Link to comment Share on other sites More sharing options...
Osgeld Posted October 12, 2018 Share Posted October 12, 2018 well 2 bucks free shipping ... not a lot to loose 1 Quote Link to comment Share on other sites More sharing options...
carlsson Posted October 12, 2018 Share Posted October 12, 2018 Doesn't the 6532 have a custom ROM part and that is what the -15 represents? Or perhaps that only applies to 6530. I know that in Commodore PET circles, each of these are unique though it has been discussed about replacement solutions with a programmable ROM part so one chip should match them all. Quote Link to comment Share on other sites More sharing options...
+DrVenkman Posted October 13, 2018 Share Posted October 13, 2018 well 2 bucks free shipping ... not a lot to loose Exactly, I ordered 5 a few years ago for about $8. One didn't work, the other four are fine. Well worth it. Quote Link to comment Share on other sites More sharing options...
Dionoid Posted November 2, 2018 Author Share Posted November 2, 2018 Update: I received the R6532P from AliExpress today and replaced it with the broken RIOT. All works fine and I've got a working 4-switch woody again. Yay! 7 Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted January 13, 2019 Share Posted January 13, 2019 Doesn't the 6532 have a custom ROM part and that is what the -15 represents? Usually on RAM and EPROMs, the trailing numbers indicate the refresh speed/access time of the memory. In this case 15 = 150ns refresh. The 6532 has 128 bytes of onboard RAM, and memory mapped registers for I/O and timer. Quote Link to comment Share on other sites More sharing options...
john_q_atari Posted January 28, 2019 Share Posted January 28, 2019 A late post to the thread but I had some recent experience with ordering RIOT chips off ebay shipped from China. Of the 10 R6532P chips I ordered only 6 worked, but of the 5 R6532AP chips I ordered, all of them worked. Worked being defined as dropping them into a socket on a Vader and then playing 2 minutes of Pitfall II. The game wouldn't even start with the ones that didn't work, and the ones that did start the game didn't exhibit any noticeable errors during the first 2 minutes of gameplay. Certainly not a thorough and rigorous test, but only about as much effort as I was willing to spend to determine if the chips were good enough or not. 2 Quote Link to comment Share on other sites More sharing options...
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