walter_J64bit Posted October 2, 2015 Share Posted October 2, 2015 (edited) OK, I don't much about 5.25 drives for the ST's other than some were made for the system. Did Atari make a 5.25 drive for the ST? What is the mode number? Edited October 2, 2015 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
Fletch Posted October 2, 2015 Share Posted October 2, 2015 Atari made the PC551 for their line of PCs. I think you can use that with an ST as well. Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted October 5, 2015 Share Posted October 5, 2015 I have some experiences with 5.25 inch floppy drives attached on ST. And not really good ones. First problem is step rate of 12mS required. That's possible with some SW. Bigger problem is higher load of some lines on floppy connector - what causes unreliable work, and in worse case damage of PSG chip in Atari. I addes some line amplifiers because of that. I'm sure that Atari never made any 5.25 drives for ST. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted October 5, 2015 Author Share Posted October 5, 2015 (edited) I have some experiences with 5.25 inch floppy drives attached on ST. And not really good ones. First problem is step rate of 12mS required. That's possible with some SW. Bigger problem is higher load of some lines on floppy connector - what causes unreliable work, and in worse case damage of PSG chip in Atari. I addes some line amplifiers because of that. I'm sure that Atari never made any 5.25 drives for ST. By, any chance was one the drives you used was an I.B. drive? I did some more digging and found that Atari did make a 5.25 drive (PC551) but it was for PC's that they made it is compatible with the ST, like you said you need SW to run it with the ST. http://www.atari-wiki.com/?title=Floppy_Disk_Drives Edited October 5, 2015 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted October 6, 2015 Share Posted October 6, 2015 It was couple of regular drives, what people had in their PCs (not Atari PCs). I would not take what Wiki claims for 100% true. Main thing is that Atari self never manufactured drives. They just took it from some manufacturer - and in those time Japanese were most spread, and added power + case, cable. You risk damage in your Atari ST if connect 5.25 floppy drive. Quote Link to comment Share on other sites More sharing options...
+DarkLord Posted October 7, 2015 Share Posted October 7, 2015 Didn't the original 8bit emulator for the ST include an option for a cable that connected an 8bit specific 5.25 inch drive to the ST? Got that memory in my head for some reason. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted October 7, 2015 Author Share Posted October 7, 2015 (edited) Didn't the original 8bit emulator for the ST include an option for a cable that connected an 8bit specific 5.25 inch drive to the ST? Got that memory in my head for some reason. Yup. http://www.emulators.com/xformer.htm Edited October 7, 2015 by walter_J64bit Quote Link to comment Share on other sites More sharing options...
+DarkLord Posted October 7, 2015 Share Posted October 7, 2015 That was it (about half-way down on the page). Thanks for the link! Quote Link to comment Share on other sites More sharing options...
Chandler Posted October 7, 2015 Share Posted October 7, 2015 see ebay item no: 151820211298 Quote Link to comment Share on other sites More sharing options...
+CyranoJ Posted October 9, 2015 Share Posted October 9, 2015 I've still got my 5.25 drive for the st. Still works as well. Had a switch fitted to the st so i could swap the drives and boot from it. Quote Link to comment Share on other sites More sharing options...
walter_J64bit Posted October 9, 2015 Author Share Posted October 9, 2015 I've still got my 5.25 drive for the st. Still works as well. Had a switch fitted to the st so i could swap the drives and boot from it. Hi, CyranoJ What drive do you have? Quote Link to comment Share on other sites More sharing options...
+CyranoJ Posted October 9, 2015 Share Posted October 9, 2015 I think it's a Cumana 40/80 track switchable - looks like the ones that people used to hook up to BBC micros. I'd have to check. Yep, it's one of these. http://i.ebayimg.com/00/s/MTAyNFgxMjQw/z/d6MAAOSwRLZUGJw9/$_1.JPG?set_id=880000500F Quote Link to comment Share on other sites More sharing options...
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