This worked perfectly, Brian! I now have a backup system disk and both have the write-protect tab on them.
thanks! By the way, the system is consistently booting now. Just had to shake the dust off of it, I guess. Still would like to see if I can get the other DVI box working. Randy > On Feb 17, 2018, at 10:24 PM, Brian White <bw.al...@gmail.com> wrote: > > The easiest way is using the backup program on the system disk. > > It's possible but I think it's probably more difficult with a modern pc. I > don't think just any modern floppy controller chip can do it, and you need a > 360K drive too, ideally, not the more common 1.2M drive. Then you also need > special formatter software, which I don't know how available that is today, > and don't know if it would work from dosbox or something. Might have to make > a freedos bootable usb stick just to run the disk writing util. > > Steven Adolf has some notes on all that on club100 in the member uploads. > > It's much simpler to just use "BACKUP.SNG" in your case right from the system > disk. > > You would boot the dvi normally, then go into basic and: > > RUN"0:FORMAT" > > Then follow the prompts to remove the system disk and put in a disk to be > blanked and formatted. > > Then put the system disk back in and: > > NEW > RUN"0:BACKUP.SNG" > > Then follow the prompts to switch back and forth putting the new disk in, > then the system disk, then the new one again, etc, until it's over. Choose > All when it asks All or System. > > I would definitely put tape over the write-protect notch on your one > remaining working system disk before any of this! > > -- > bkw > > On Feb 17, 2018 9:19 PM, "Randall Kindig" <randall.kin...@gmail.com > <mailto:randall.kin...@gmail.com>> wrote: > I will check that, Brian. Thanks for your help. > > My other question is around the boot disk. I was sent 2 boot disks with the > cable, but now only 1 seems to work. I’m worried now only having one working > disk. > > How do I back it up? Is there a way to do that with the DVI? Can I create > one in a different disk drive, like the drive in the TRS-80 Model 4P? > > thanks > > Randy >> On Feb 17, 2018, at 9:15 PM, Brian White <bw.al...@gmail.com >> <mailto:bw.al...@gmail.com>> wrote: >> >> This sounds consistent with Fugu's idea about old capacitors. It sounds like >> both dvi's are marginal, but one is slightly better than the other, and one >> of your M100's is slightly better than the other, and so with the two best >> ones combined, it just barely works, sometimes. >> >> I would check that voltage as he described and I expanded. >> >> On Feb 17, 2018 8:37 PM, "Randall Kindig" <randall.kin...@gmail.com >> <mailto:randall.kin...@gmail.com>> wrote: >> SUCCESS! >> >> Per John’s suggestion (and was thinking the same thing when he suggested it) >> I now have a working system. I started trying different combinations of >> DVI/M100/cable (of which I have 2 each). >> >> DVI #2, M100 #2, Cable #2, no luck >> >> So I swapped out M100 #2 (32K) for M100 #1 (24K/REX), and it worked! >> >> It’s still a little finicky and doesn’t always work, but has worked multiple >> times now. I don’t know if there’s anything I can do to “tune” it so it’s >> more consistent, but I”m pumped that I finally got it to work. >> >> I had tried this M100/cable combination with DVI #1, so I’m wondering if >> there’s an issue with that DVI. There also must be an issue of some sort >> with M100 #1 as the current DVI/cable setup didn’t work with that machine, >> but does with the other. >> >> This sure seems like a finicky setup. I would love to see a modern DVI >> replacement, perhaps with SD card for disk and video output, that would take >> up far less desk space and be more robust. >> >> Thanks all! Any other suggestions for troubleshooting why the M100 (#2) >> doesn’t work with this and also why DVI #1 doesn’t work with either M100 >> would be much appreciated. >> >> Randy >> >> >> > On Feb 17, 2018, at 4:22 PM, Randy Kindig <randall.kin...@gmail.com >> > <mailto:randall.kin...@gmail.com>> wrote: >> > >> > I was just thinking the same thing John. It’s worth a try. >> > >> > Thanks >> > >> > Sent from my iPhone >> > >> >> On Feb 17, 2018, at 3:07 PM, John R. Hogerhuis <jho...@pobox.com >> >> <mailto:jho...@pobox.com>> wrote: >> >> >> >> Btw it occurs to me that there are 16 permutations possible there. Not so >> >> high that you couldn’t do all 16 and see if you ever get different >> >> results in any of 16 if you haven’t already. >> >> >> >> — John. >> >
