Randy Posted June 20, 2020 Share Posted June 20, 2020 Atari C301166-002A. I remember seeing a list a while back for the TOS roms but can't seem to find it and the listing on the BEST site doesn't have this particular number. Thanks! Quote Link to comment Share on other sites More sharing options...
bfollowell Posted June 20, 2020 Share Posted June 20, 2020 A quick Google search with several search results seems to imply that it is from a TOS 1.6 set. Do you have a machine with that in it? If so, and it's running, run SysInfo to tell you for certain which version of TOS it is. 1 Quote Link to comment Share on other sites More sharing options...
snarkdluG Posted June 20, 2020 Share Posted June 20, 2020 TOS 1.06 UK 1 Quote Link to comment Share on other sites More sharing options...
Randy Posted June 20, 2020 Author Share Posted June 20, 2020 Thanks guys, that is what I was expecting, BTW, what/where is sysinfo, not sure I have that laying about on a disk. Quote Link to comment Share on other sites More sharing options...
bfollowell Posted June 20, 2020 Share Posted June 20, 2020 It's a must have utility for STs. https://sites.google.com/site/stessential/system-tools/sysinfo If you don't have a Gotek or a hard drive on the machine, it may be kind of hard to get it onto the machine though. I guess if you have a 3.5" floppy on your modern computer you might be able to put it onto a disk, but very few people have working disk drives these days. Quote Link to comment Share on other sites More sharing options...
pixelmischief Posted June 23, 2020 Share Posted June 23, 2020 I have a plain old Imation USB floppy drive on my PC that will read from and write to 720K floppies IF they are first formatted on the Atari. I haven't been able to get it to format 720K, though. Quote Link to comment Share on other sites More sharing options...
Randy Posted June 23, 2020 Author Share Posted June 23, 2020 Interesting, my USB floppy was to be used to transfer/run programs over 720K on my Mega STe, but can't get the Epson 340 HD floppy to work in HD mode, although fine in DSDD mode. Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted June 23, 2020 Share Posted June 23, 2020 DIP switch 7 must be set for HD mode. Quote Link to comment Share on other sites More sharing options...
Randy Posted June 23, 2020 Author Share Posted June 23, 2020 52 minutes ago, ParanoidLittleMan said: DIP switch 7 must be set for HD mode. done and done, no change Quote Link to comment Share on other sites More sharing options...
ParanoidLittleMan Posted June 24, 2020 Share Posted June 24, 2020 Is FDC chip in your Mega STE Ajax ? Only that works guaranteed in HD mode (16 MHz) . Should be it by factory, but might be replaced. Line 2 on floppy cable must be present - density signal. And of course, it may be just drive's fault. Quote Link to comment Share on other sites More sharing options...
guus.assmann Posted June 24, 2020 Share Posted June 24, 2020 For 1.44 MB to work, there's also a Gal that needs to be the right revision. If not, it won't work either. If I'm not mistaken, the one you need is in this .zip However I'm not sure which one to get. And I don't have source code. I did replace that one in my computer as well and also placed the FPU and Gal with that. BR/ Guus GAL.zip Quote Link to comment Share on other sites More sharing options...
Randy Posted June 24, 2020 Author Share Posted June 24, 2020 Thanks guys, went back through this and I see I don't have the Ajax chip, just the standard WD-1772 chip present as well as roms 2.05. I do have the correct GAL and the connection between the Gal and the 68000 is present. One thing to note, the SMD-340 did at one time try to do a HD format, but then stopped and never really has been able to read an HD floppy, even after all the drive cleaning and re-capping. From what I see present, probably only the Ajax chip would been needed to get this to work properly as it did try to at one time. BTW, it appears from the Atari field notes that the floppy cable needs to be flipped to work with the 340, for a 380 DSDD, the orientation remains the same. I have been watching a lot of videos on floppy repairs, particularly gadgetuk164, he has a 100% success rate at getting these floppy drives to work on his Amigas. Right now, while I have done a number of repairs on my floppys, one thing that maybe trowing them off is one of the replacement caps is a little tall and doesn't allow the rear pcb to sit absolutely flat which may be affecting the track zero sensor, new caps on the way will eliminate that particular problem this week. Quote Link to comment Share on other sites More sharing options...
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