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Ed in SoDak

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About Ed in SoDak

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  • Birthday 03/24/1955

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    Black Hills of South Dakota

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  1. Arrgh. At least you've absolved the PEB since other cards seem to work. What's the current plan? Borrow a working controller? Hard to imagine the short cable going bad, but it's possible one of the connectors has been bent so as to no longer make contact or it's simply a bit dirty. I'd think all the swapping has rubbed away any minor contact grundge issues. You're getting some function since the drive is lit up and the motor spins. Is there any side-to-side slop when attaching it, that perhaps it's not aligning well with the connector fingers on the drives? Again, not likely, but easy to check. I wondered about the pic you posted on the bottom of the first page of this thread showing the WD1171 chip having an exposed window, but I see that in at least one other pic on Mainbyte's pages. Thierry's site seems to show it covered by tape, but the pic is very low-res. I've never opened my own controller to compare. I own a non-working sidecar disk controller that also uses the WD1771, but don't recall if the chip is socketed or soldered in or if the window is exposed or not. Chip-level troubleshooting takes some sleuthing with a logic probe and/or an oscilloscope and good knowledge of what to look for. Card replacement is probably the easiest way to go. Stephen Shaw had some good info on tracing out and repairing wonky controllers. -Ed
  2. The disk sizes say only SSSD. Are you physically flipping the disk over, like a phono record or cassette tape? If so, you have a homemade "flippy" disk. I used to do that before upgrading to double-sided drives. It works by punching an extra index hole and write-protect notch in the floppy's jacket (but not the disk inside!) You need to make an index hole on both sides of the jacket so the LED can shine through. The bad part is the disk rotates opposite directions when flipped, which can sometimes move some grit around. Pretty common on Apple II, which only had single-sided drives. They used to sell a puncher made to do just that. I still have mine stashed somewhere... Instead of cutting the modulator cable to convert to composite, you can solder your RCA cables onto the correct spots on the circuit inside the modulator and have it both ways. -Ed
  3. Would it help if I said he lands on a TI?
  4. He's only trying one at a time. On my old full-size drives way back before I got some half-height, I often had to adjust the speed trimmer and sure saw some PS sag that would slow down the drive. My own DSK1 and 2 are external. DSK3 is in the PEB so it's not used much. As a test to lighten the PEB's load, could pull the 32k card and anything else other than the controller and interface cards. Metering drive voltages while spinning would tell the tale. -Ed
  5. I'm gonna try to get 'em in the mail today. -Ed
  6. According to an email yesterday: The yahoo group sites are now down, but members have till the end of January to request their content be emailed to them. -Ed
  7. Something to do might be to monitor the drive voltages when it's called into duty. If either sags, either the drive will spin slower or logic states might become unstable. Reading you had two full-height drives, I sorta assumed you had an external supply, maybe even an enclosure. I think the PEB's supply is minimal at best with powering drives. I did have one PEB working with dual half-heights in the bay, but now I have a full-height double-sided drive in there and it works fine. I've formatted two disks in SSSD. I can put a few things on one just to see if you can load them or get a directory, save a "Hello World" program to it, etc. -Ed
  8. At least part of the delay is normal. The TI will attempt to do what is asked, but only for a little while if it fails. Like starting Extended BASIC, it will look 5 or more seconds on drive 1 for a file named LOAD. If it's not found, the TI then ends the search (without error) and gives you the cursor. Trying to load a non-existent file OLD DSK1.NONESUCH it will make the attempt for a few seconds, then report the fail with Error 02, file not found. If the disk and directory are ok, it won't take long to give you the error report. Sometimes I just forget to close the drive door and get Error 06 after a fairly long attempt. If I manage to shut the door before it errors out, it'll go ahead with loading or whatever I've asked it to do. Another Captain Obvious comment: Is the disk label facing up? -Ed
  9. No, they're not related. The TI is so flexible, you can have multiple failures! :roll: File Not Found with cassette is volume too low. There's several common reasons for that we can go into if you like. -Ed
  10. Thanks for the correction, Omega. I knew there was an upgrade, just misremembered the format. While the original TI full-height drives were indeed just single-sided; double-sided full-height drives are around or used to be, anyway. I currently have one in my PEB, with two half-height DS drives in an external enclosure. You can squeeze dual half-height drives into the PEB, but it's just a bit much for the PEB's power supply. Depends a bit on the drives, some use less power than others. -Ed
  11. You can peer inside the drive's open door to look for two heads. Being full-height, it's as likely as not they are only single-sided drives. If that's the case, only one head will be seen, the other is simply a small felt pad. That would be SSSD, for 90K of storage. The TI controller typically does not care if the floppy is capable of DSDD. The limiting factor is what the drive itself can handle. It's easy to upgrade, any old PC floppy drive can be used, half- or full-height, most of which are double-sided. Then, as Omega noted, the stock TI disk controller maxes out with DSSD. Some of the third-party controllers can format DSDD. While I believe the TI controller can be upgraded to DSDD, I think those are pretty scarce. Pop the two latches under the read edge of the PEB's lid and it should be obvious by the name tag on the card which controller you have. Apparently your PEB did not include any floppies already formatted with files on them? PM me with your mailing address and I'll send a couple floppies your way. -Ed
  12. All that aside, here's a few more. Should be readable to most here I hope. Perhaps as text, though formatting might be a bit wonky. C Bobbit New Mem CO dijitcard mcgov spider memdebate scsi:co df128 wht:co593 xb3 bobbit
  13. Interesting, although not meant to hijack the thread to discuss file conventions. I've never been able to use DSK format. A few years back, Lucien kindly wrote a Classic Mac OS9 program to allow me to open them and extract to individual V9T9 files. My own ports from hardware arrive in TIFILES. To use them, I must convert to V9T9. It's just the nature of my pre-Intel Mac. While I can run Classic99 on my Mac via VPC, it's a total sloth. TI99Dir is also not my preferred method. A lot of my old Delphi archived logs are stored on my floppies in Archiver format. Porting them to Mac, they come in as TIFILES archives. To me, that requires yet another step for people here to make use of them. It's also easier for me to transfer a TI disk to my Mac as a whole-disk archive, rather than individual files. I create and port the archives, then convert to V9T9, open and de-arc them in my emulators to now separate files all in V9T9. So it's a bit of a backwards step for me to convert them back one by one to TIFILES simply for posting here. I could post the TIFILES archives if that helps, except it puts the onus of the de-arc step onto those who grab 'em. Likewise, converting same to straight text is again a bit of few extra steps for me. It helps that AA now lets me attach files without having to append a ".txt" extension that the downloader had to remove before using them. -Ed
  14. Tony & Will McGovern Delphi TI conference, January 10, 1993. WHT conference in three parts, October 25, 1992. All DV80 in V9T9 format. What's the preference, TIFILES, V9T9 or does it matter these days? -Ed MCGOVCO WHTCO2A WHTCO2B WHTCO2C
  15. I'm in the slow process of porting some of my old floppies. There are several conferences on Delphi's TI forum from the early '90s. I don't know how much of this stuff has been preserved. A fun read from back when many things were still under development and about to be released (or not!) -Ed
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