cbmeeks Posted February 20, 2019 Share Posted February 20, 2019 I just purchased a floppy disk controller (PHP1240) for my PEB. I read the MainByte page on it and it appears that I can only use an official TI disk drive. SSSD or DSSD drives. Is that true? I have a couple standard 1.2 MiB floppy drives but I'm guessing those can't work. What's my best option for a 5 1/4" drive? Thanks! Quote Link to comment Share on other sites More sharing options...
+Schmitzi Posted February 20, 2019 Share Posted February 20, 2019 Hi, don´t know what the best option is, but have a look here: (There are some drives that only work anlone in the PEB) TI-99-4A-FLOPPY-DRIVES-TI-99-v1.14-ALL.pdf 32.18KB -9 downloads Legend (for the last column in the list): (Source:) http://atariage.com/forums/topic/241978-ti-994a-resources-lists-pdfs-and-some-lists/ Quote Link to comment Share on other sites More sharing options...
apersson850 Posted February 20, 2019 Share Posted February 20, 2019 48 tracks per inch, 40 track drives work. I have Teac FD 55B, as one example. Quote Link to comment Share on other sites More sharing options...
cbmeeks Posted February 20, 2019 Author Share Posted February 20, 2019 Thanks! I will look at my drives and see if they are on the list. Quote Link to comment Share on other sites More sharing options...
+TheBF Posted March 19, 2019 Share Posted March 19, 2019 Many years ago... I found 2 Shugart SA455 1/2 height drives in a local shop and almost lost my mind. I bought them both and put them in the old 99. One of them died shortly after taking the rig out of hibernation last year and I found one on EBAY. Could be one of the last ones out there. But for what it's worth, they are compatible with the stock disk controller and give DSSD (double sided single density) with 180 Kbytes of storage per diskette! https://www.ebay.ca/itm/RARE-1983-VINTAGE-SHUGART-ASSOCIATES-5-25-BLACK-360KB-FLOPPY-DISK-DRIVE-SA455-/233171683128?oid=233132763096 Quote Link to comment Share on other sites More sharing options...
Flottmann1 Posted March 19, 2019 Share Posted March 19, 2019 (edited) there you can buy a PEB Box with 2 x Floppy Drives https://www.ebay.com/itm/TI-99-4A-PHP1200-Peripheral-Expansion-Texas-Instruments/303097440323?hash=item469203e843:g:FNAAAOSwPntcQiPq https://www.ebay.com/itm/TI-99-4A-Peripheral-Expansion-System-PEB-W-Disk-Controller-Dual-Floppy-Drive/163596025929?hash=item2617154049:g:4woAAOSwDcJcidkP Edited March 19, 2019 by Flottmann1 2 Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted March 20, 2019 Share Posted March 20, 2019 About the only 48TPI drives you need to stay away from are the ones from Qume. They had a relatively high power draw, and two of them would overload the PEB power supply. Avoid 1.2M drives like the plague as well. Basically, if the drive says it is 48 TPI, 40-track, or 360K, it will work. If you do the 80-track modification to your disk controller, you can also use 96TPI, 80-track, 720K disks. This option is good if you want to add a 3.5-inch drive. Quote Link to comment Share on other sites More sharing options...
apersson850 Posted March 20, 2019 Share Posted March 20, 2019 The drives that were delivered as standard drives in the IBM PC, before hard drives became the norm, also works. I have two, labeled IBM on the front, but made by Shugart, in my secondary expansion box. 1 Quote Link to comment Share on other sites More sharing options...
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