zilog system 8000
https://www.ebay.com/itm/292646012304 local pickup only the reserve is >$1500 I would guess the CDC Winchesters are toast if they haven't had their heads locked
Re: zilog system 8000
oh, and this isn't me. I just had a really bad experience with them where they "lost" 2 of the 5 Priam disk drives I bought from them, so I guess local pickup in Rochester NY is a good thing. On 7/18/18 4:01 PM, Al Kossow via cctalk wrote: > > https://www.ebay.com/itm/292646012304 > > local pickup only > > the reserve is >$1500 > > I would guess the CDC Winchesters are toast if they haven't had their heads > locked > >
Re: zilog system 8000
On Wed, 18 Jul 2018, Al Kossow wrote: https://www.ebay.com/itm/292646012304 local pickup only the reserve is >$1500 ROTFL A very big and expensive door stopper without OS tapes. But most importantly: the CPU board is missing! The card in slot 2 appears to be an additional SIO card. This is a model 20, quite low-end. We have a model 32 (much rarer, I haven't found anyone else with a model 32), but it is non-functional because I have no tapes. The SMD disk has too many errors to recover a functional system. Christian
Re: zilog system 8000
On Thu, Jul 19, 2018 at 12:53 AM, Christian Corti via cctalk < cctalk@classiccmp.org> wrote: > On Wed, 18 Jul 2018, Al Kossow wrote: > >> https://www.ebay.com/itm/292646012304 >> >> local pickup only >> >> the reserve is >$1500 >> > > ROTFL > A very big and expensive door stopper without OS tapes. > But most importantly: the CPU board is missing! > The card in slot 2 appears to be an additional SIO card. > > This is a model 20, quite low-end. We have a model 32 (much rarer, I > haven't found anyone else with a model 32), but it is non-functional > because I have no tapes. The SMD disk has too many errors to recover a > functional system. > There's a Model 31 at LCM+L (used to be mine). If anyone ever does recover media for these things, it'd be nice to get it running... - Josh > > Christian >
Re: zilog system 8000
On 7/19/18 10:20 AM, Josh Dersch via cctalk wrote: > There's a Model 31 at LCM+L (used to be mine). what kind of disk does it have?
Re: zilog system 8000
On Thu, Jul 19, 2018 at 2:16 PM, Al Kossow via cctalk wrote: > > > On 7/19/18 10:20 AM, Josh Dersch via cctalk wrote: > > > There's a Model 31 at LCM+L (used to be mine). > > what kind of disk does it have? > > SMD Disks, 40mb Memorex. Don't recall the model numbers, I can dig it up if you need. - Josh
Re: zilog system 8000
A very big and expensive door stopper without OS tapes. But most importantly: the CPU board is missing! The card in slot 2 appears to be an additional SIO card. This is a model 20, quite low-end. We have a model 32 (much rarer, I haven't found anyone else with a model 32), but it is non-functional because I have no tapes. The SMD disk has too many errors to recover a functional system. There's a Model 31 at LCM+L (used to be mine). If anyone ever does recover media for these things, it'd be nice to get it running... - Josh VCF has one but I'm not sure which model it is. I can check next week. We also have some tapes, again, I don't know which ones.
Re: zilog system 8000
IIRC that was one of the first donations to our club back in 2005 On Fri, Jul 20, 2018 at 1:04 AM Evan Koblentz via cctech < cct...@classiccmp.org> wrote: > > >> A very big and expensive door stopper without OS tapes. > >> But most importantly: the CPU board is missing! > >> The card in slot 2 appears to be an additional SIO card. > >> > >> This is a model 20, quite low-end. We have a model 32 (much rarer, I > >> haven't found anyone else with a model 32), but it is non-functional > >> because I have no tapes. The SMD disk has too many errors to recover a > >> functional system. > >> > > > > There's a Model 31 at LCM+L (used to be mine). If anyone ever does > recover > > media for these things, it'd be nice to get it running... > > > > - Josh > > VCF has one but I'm not sure which model it is. I can check next week. > We also have some tapes, again, I don't know which ones. >
Re: zilog system 8000
On 7/20/18 6:20 AM, Bill Degnan via cctalk wrote: >> We also have some tapes, again, I don't know which ones. Be VERY careful with those if you find them. They are NOT QIC-compatible and the belts WILL be bad.
Re: zilog system 8000
I have one model 21 and one model 11. Finch drive and ST506 drive respectively. Not sure about the status of disks, but I have a spare Finch drive. I also have three install tapes. One Sadie 3.5 and two ZEUS 3.21. When time permits I will read those. AJ Palmgren read a tape with a tar archive I made myself on this machine many years ago. The ouput I got from AJ was Saleae logic analyzer dumps. One per track read. He is using a quite standard Wangtek 5099 drive where he is able to control the head in more detail. Some dumps were from tracks which were spot on one of the tracks on the tape. Others were not a full hit. I had to test all of them. I created a small program that decoded the MFM data off the tracks. It processed gigabytes worth of samples. Checked the CRC and wrote it to file so I could recover the archieve. http://www.datormuseum.se/computers/others/zilog-s8000/extract-s8000-tapes Credits goes to AJ Palmgren for reading the tape and to David Gesswein from whom I stole and modified the MFM decoder. And as Al wrote: No it is not at all QIC. The drive has four fixed tracks and the encoding is MFM. /Mattis fredag 20 juli 2018 skrev Al Kossow via cctalk : > > > On 7/20/18 6:20 AM, Bill Degnan via cctalk wrote: > > >> We also have some tapes, again, I don't know which ones. > > Be VERY careful with those if you find them. They are NOT > QIC-compatible and the belts WILL be bad. > >
Re: zilog system 8000
On 7/20/18 2:43 PM, Mattis Lind wrote: > And as Al wrote: No it is not at all QIC. The drive has four fixed tracks > and the encoding is MFM. These 4-track fixed-head drives were common drives prior to the invention of movable head devices. TI used them in 990 systems as well as early 80 companies like Onyx and in particular DSD, which used the Kennedy 6455 of which I have several out of the DSDs with good capstans that I had hoped to try recovering the TI and other carts on. I have two Zeus carts: f77 src & lib src tape zeus 3.21 games executable & virg game src zeus 5.1
Re: zilog system 8000
On Sat, Jul 21, 2018 at 3:26 AM, Al Kossow via cctalk wrote: > > > On 7/20/18 2:43 PM, Mattis Lind wrote: > >> And as Al wrote: No it is not at all QIC. The drive has four fixed tracks >> and the encoding is MFM. > > These 4-track fixed-head drives were common drives prior to the invention of > movable head devices. TI used them in 990 I seem to remember the original QIC11 standard was (or at least included) a 4 track version. And the later 9 track format kept those 4 tracks in the same place and put 5 more, one on each side and 3 between them if you see what I mean. So unless you need to read 2 tracks simultaneously (e.g. becuase it uses the encoded where a pulse on one track is a '0', a pulse on the other is a '1' and pulses on both together are a marker) you can probably get the data off the tape with a raw 4 track or 9 track drive and a custom controller. -tony
Re: zilog system 8000
> > I seem to remember the original QIC11 standard was (or at least included) a > 4 track version. And the later 9 track format kept those 4 tracks in the > same > place and put 5 more, one on each side and 3 between them if you see what > I mean. > > So unless you need to read 2 tracks simultaneously (e.g. becuase it uses > the > encoded where a pulse on one track is a '0', a pulse on the other is a '1' > and > pulses on both together are a marker) you can probably get the data off > the tape > with a raw 4 track or 9 track drive and a custom controller. That didn't work when AJ read my S8000 tapes at least. Some of the tracks had to be read a few stepper motor steps off the nominal track to give a good read. And I did the decoding in software. No custom conroller hardware. /Mattis > > -tony >
Re: zilog system 8000
On 7/20/18 2:43 PM, Mattis Lind wrote: > Credits goes to AJ Palmgren for reading the tape and to David Gesswein from > whom I stole and modified the MFM decoder. > > And as Al wrote: No it is not at all QIC. The drive has four fixed tracks > and the encoding is MFM. > I hadn't looked at Al's page in a while, I see there was a long discussion of removing the gunk stuck to the surface from the belt, with no real solution. I need to do some more experiments with solvents on scratch tapes.
