AwkwardPotato Posted January 5, 2018 Author Share Posted January 5, 2018 The 74LS259 still hasn't arrived, however, while waiting, is there anything else that should happen during the normal TI startup sequence that I should check for on the card, in order to determine if there are other faults elsewhere, since even when the drive is selected properly it refuses to work? Quote Link to comment Share on other sites More sharing options...
pcoderdude14 Posted January 5, 2018 Share Posted January 5, 2018 The 74LS259 still hasn't arrived, however, while waiting, is there anything else that should happen during the normal TI startup sequence that I should check for on the card, in order to determine if there are other faults elsewhere, since even when the drive is selected properly it refuses to work? Hey there! There is a little trick that I know, that doesn't actually do anything else then make sure that the FDC card is "connected" to the drives...that is , to take the "card edge " connector, and, turn it upside down...purposely. If, when you do so, the drive(s) lights (LEDs) turn on AND stay on, ...that way, you know that the drives are getting SOMETHING from the card. Of course, when you've turn on the P-box to get the drives "lit" , make sure that you turn the power off (to P-box, and, drives that are being powered w/o the P-box Power Supply)....and then switch back the "card edge" connector the right way again. I hope this helps.... Having VERY similiar problems with my CorComp FDC. Jt Quote Link to comment Share on other sites More sharing options...
Opry99er Posted January 5, 2018 Share Posted January 5, 2018 So, all your Disk commands return this error? RUN DSK1.TEST SAVE DSK1.TEST etc.? Additionally, this may sound silly, but have you moved your controller card over one slot in the PEB? 1 Quote Link to comment Share on other sites More sharing options...
AwkwardPotato Posted January 5, 2018 Author Share Posted January 5, 2018 - pcoderdude14: I'll try that out when I get the chance. - Opry99er Yep, every single disk command returns that error, whether in TI Basic or Disk Manager. The card is in Slot 8. Quote Link to comment Share on other sites More sharing options...
AwkwardPotato Posted September 8, 2018 Author Share Posted September 8, 2018 Finally got around to working on the Disk Controller Card again: I replaced the 74LS259, 'LS244's, and 'LS245's. Now, when I try to OPEN #1:"DSK1.X" in TI Basic, I get I/O ERROR 06, regardless of if a disk is in the drive or not. When I try to format a disk in Disk Manager, regardless of name, track number, etc. it immediately stops and says SCREEN IS COMPLETE after I select Y/N for 40 tracks. Quote Link to comment Share on other sites More sharing options...
Casey Posted September 8, 2018 Share Posted September 8, 2018 I think you have to press PROC'D when it says "Screen is complete" before it will actually do it. That message just gives you a chance to change anything on the screen by pressing REDO or cancelling by pressing BACK. I/O ERROR 06 seems right for an unformatted disk (or no disk at all). Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted September 8, 2018 Share Posted September 8, 2018 Don't forget to hold the Function key down along with the Proceed key, as that is one of those things that requires both keys pressed at the same time to make it work as desired. Quote Link to comment Share on other sites More sharing options...
AwkwardPotato Posted September 8, 2018 Author Share Posted September 8, 2018 That did the trick, thanks! Quote Link to comment Share on other sites More sharing options...
fabrizio Posted January 18, 2019 Share Posted January 18, 2019 Here's the configuration of the termination pack and the shunt pack: From what I've read on The TI Tech Pages, the shunt pack is configured for the head to be loaded by the select line, and for the drive to be selected by SEL1. The termination pack seems to be the original part. Quote Link to comment Share on other sites More sharing options...
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