aftyde Posted October 25, 2015 Share Posted October 25, 2015 Hi All, I have two TI controllers... One has the John Guion ROM's with some traces added to the board and a single wire connected to the external bus. This allows access to four double-sided single-density (DSSD) drives and the use of "dskn" in lower case. The other is a mystery. I have de-shelled it and posted a picture. Two ROM's with wires headed out to a switch. Anyone know what this mod is supposed to do? Cheers, Arthur... Quote Link to comment Share on other sites More sharing options...
aftyde Posted October 25, 2015 Author Share Posted October 25, 2015 Looks like I figured it out... 80 track upgrade... http://www.mainbyte.com/ti99/upgrade/upgrade.html 1 Quote Link to comment Share on other sites More sharing options...
Shift838 Posted October 26, 2015 Share Posted October 26, 2015 Looks like I figured it out... 80 track upgrade... http://www.mainbyte.com/ti99/upgrade/upgrade.html yup looks like one of the original 80 track upgrades for the TI FDC. The newer 80 track upgrade is just a 2 chips to pop in. No jumping ore resistors.. Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted October 27, 2015 Share Posted October 27, 2015 Didn't one of those original 80-track mods also let you use 8" floppies? Quote Link to comment Share on other sites More sharing options...
Shift838 Posted October 27, 2015 Share Posted October 27, 2015 Didn't one of those original 80-track mods also let you use 8" floppies? I believe it did, but not completely sure. Quote Link to comment Share on other sites More sharing options...
+Schmitzi Posted November 2, 2015 Share Posted November 2, 2015 uih, not bad. I have some pics from a 8"-Shugart-drive, so I just post them... If I remember correct, this drives were running with 110/220 Volts full throttle-power 1 Quote Link to comment Share on other sites More sharing options...
budz2355 Posted January 2, 2016 Share Posted January 2, 2016 Oh man that would be awesome! Does anyone have the ability to test the 8" mod? I would totally buy a drive if I could find one for $200 or less working (...and knew that I could connect it to my TI) Quote Link to comment Share on other sites More sharing options...
budz2355 Posted January 2, 2016 Share Posted January 2, 2016 uih, not bad. I have some pics from a 8"-Shugart-drive, so I just post them... If I remember correct, this drives were running with 110/220 Volts full throttle-power Shugart-851-8in-Floppy-01.JPG Shugart-851-8in-Floppy-03.JPG Shugart-851-8in-Floppy-10.JPG Any enclosures available for these drives? Do I need a nuclear generate to run this beast or will my PEB power it? Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted January 2, 2016 Share Posted January 2, 2016 The PEB will definitely NOT power an 8" drive. . .you need to put them in an external enclosure with a power supply suited to 8" drives. They suck a LOT of power compared to a 5.25 drive. Quote Link to comment Share on other sites More sharing options...
Stuart Posted January 2, 2016 Share Posted January 2, 2016 Some 8" drives need 24V DC and 110V AC mains supplies ... Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted January 3, 2016 Share Posted January 3, 2016 Oh man that would be awesome! Does anyone have the ability to test the 8" mod? I would totally buy a drive if I could find one for $200 or less working (...and knew that I could connect it to my TI) I have two 8" drives I have been dying to try out. I have them ear-marked for reading (or trying) my old System/34 disks which contain my libraries from high school. Quote Link to comment Share on other sites More sharing options...
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