10 Mar
2019
10 Mar
'19
7:48 p.m.
Since I'm going to be out in Seattle for a week to participate in VCF/PNW,
I was wondering if anyone in the area could lend me a hand with help
reading in an old QIC-24 25MB tape cartridge or two?
One has the TurboDOS backup/install media for a Televideo TS-816 that I got
from Don Maslin back in the day. I think the other one
is related too, but
it was unmarked.
I would like to at least try to get images off of them. At least one of
them has a working belt.. the other ones fell apart when i tried removing
the belt to reform it.
Thank,
Patrick Finnegan
10:19 a.m.
Really? They're DC300 cartridges.
On Mon, Mar 11, 2019 at 1:16 PM Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
On 3/10/19 7:48 PM, Patrick Finnegan via cctalk wrote:
One has the TurboDOS backup/install media for a
Televideo TS-816 that I
got
from Don Maslin back in the day. I think the
other one is related too,
but
it was unmarked.
TS-816 tapes aren't QIC
10:32 a.m.
If you open it up, it should have a DEI tape drive in it, which predates QIC
The data coming off the tape is NRZ instead of GCR
I just double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
This is a problem for a bunch of systems built in the early 80's (Zilog, Onyx, etc)
I have a stack of tapes in the queue (incl an 816 tubodos tape) for me to get fixed-head 4
track reading working
On 3/11/19 10:19 AM, Patrick Finnegan wrote:
Really? They're DC300 cartridges.
On Mon, Mar 11, 2019 at 1:16 PM Al Kossow via cctalk <cctalk at classiccmp.org
<mailto:cctalk at classiccmp.org>> wrote:
On 3/10/19 7:48 PM, Patrick Finnegan via cctalk wrote:
One has the TurboDOS backup/install media for a
Televideo TS-816 that I got
from Don Maslin back in the day. I think the other one is related too, but
it was unmarked.
TS-816 tapes aren't QIC
10:49 a.m.
Ah, interesting.
I've got a drives, but bad rollers (and one burned out EOT lamp to replace,
which is annoying but should be easy enough).
Any suggestions on sizes for the rollers? I have one that is starting to
go, and the other one is goo already. I can probably guess at sizes but I
thought I should ask first.
I did think it's interesting that they used a SIO/2 in the system to read
the tape. I think I realized it was 4 track NRZI encoded from the GEI
manual, but didn't realise that (older) QIC wasn't.
Patrick Finnegan
On Mon, Mar 11, 2019, 13:32 Al Kossow via cctalk <cctalk at classiccmp.org>
wrote:
If you open it up, it should have a DEI tape drive in
it, which predates
QIC
The data coming off the tape is NRZ instead of GCR
I just double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
This is a problem for a bunch of systems built in the early 80's (Zilog,
Onyx, etc)
I have a stack of tapes in the queue (incl an 816 tubodos tape) for me to
get fixed-head 4 track reading working
On 3/11/19 10:19 AM, Patrick Finnegan wrote:
Really? They're DC300 cartridges.
On Mon, Mar 11, 2019 at 1:16 PM Al Kossow via cctalk <
cctalk at classiccmp.org
<mailto:cctalk at classiccmp.org>> wrote:
On 3/10/19 7:48 PM, Patrick Finnegan via cctalk wrote:
> One has the TurboDOS backup/install media for a Televideo TS-816
that I
got
> from Don Maslin back in the day. I think
the other one is related
too, but
it was
unmarked.
TS-816 tapes aren't QIC
3:45 p.m.
On 3/11/19 10:49 AM, Patrick Finnegan via cctalk wrote:
Ah, interesting.
I've got a drives, but bad rollers (and one burned out EOT lamp to replace,
which is annoying but should be easy enough).
Any suggestions on sizes for the rollers? I have one that is starting to
go, and the other one is goo already. I can probably guess at sizes but I
thought I should ask first.
I use 4mm ID silicone vacuum hose. Works well and requires no
adhesive--just stretch it over the bare hub.
--Chuck
4:32 p.m.
On 3/11/19 3:45 PM, Chuck Guzis via cctalk wrote:
I use 4mm ID silicone vacuum hose. Works well and
requires no
adhesive--just stretch it over the bare hub.
e.g. Something like ebay item 132808966973
I use the red stuff, but it comes in a variety of colors. I re-did the
PVC vacuum hoses on my truck with great success a couple of years ago
and had some left over. Thus far, I've reworked about 6 drives of
various flavors and all work.
--Chuck
5:19 p.m.
On 3/11/19 10:32 AM, Al Kossow via cctalk wrote:
If you open it up, it should have a DEI tape drive in
it, which predates QIC
The data coming off the tape is NRZ instead of GCR
I just double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
This is a problem for a bunch of systems built in the early 80's (Zilog, Onyx, etc)
I have a stack of tapes in the queue (incl an 816 tubodos tape) for me to get fixed-head
4 track reading working
I've got a 3M DCD-3 4-track drive if you're interested. It's been
sitting around for a time and comes with a rackmount Lambda PSU that I'm
certain needs recapping.
I'm not sure what the 50-conductor ribbon cable interface is, but I
suspect it's nothing standard.
--Chuck
6:27 p.m.
On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote:
sounds familiar.
several companies made 6400 bpi four-track non-serpentine drives
DEI, Kennedy, TI, and 3M for example
I'd have to check, but I think there was an ANSI standard for the tape
format (predates the Quarter-Inch Committee).
TI used them in disk/tape combos for the 990,
DSD used Kennedy drives for the same purpose.
I just
double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
Was this thing referred to as a "Funnel"?
7 p.m.
On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote:
No, that was 3M; they had the "Funnel", the "Super Funnel" and the
"Serpentine Funnel" as well as the "Streaker".
--Chuck
I just
double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
Was this thing referred to as a "Funnel"? Maybe that was a Prime
specific name though.
7:07 p.m.
On 3/11/19 5:51 PM, Dennis Boone via cctalk wrote:
My wetware threw a parity error--the "funnel" "super funnel"
"streaker"
and "serpentine funnel" were DEI terms.
hard keeping the players straight nowadays.
--Chuck
I just
double-checked and the drive pinouts match the DEI CMTD-3400 manual
I know, it isn't obvious at all from the maint manual..
Was this thing referred to as a "Funnel"? Maybe that was a Prime
specific name though.
10:42 p.m.
A few years back AJ Palmgren helped me recover data from a S8000 tape using
his hacked QIC drive. He fed the data coming off the drive into a Saleae
logic analyzer. I took the gigantic dumps and wrote a software decoder. The
data on the tape are MFM encoded. It went pretty well and I could recover
the entire tape.
http://www.datormuseum.se/computers/others/zilog-s8000/extract-s8000-tapes
So you can read these tapes by other means than the original drive. It just
requires some tinkering with the drive to get the correct tracks and some
software.
9:17 a.m.
tisdag 12 mars 2019 skrev Al Kossow via cctalk <cctalk at classiccmp.org>:
On 3/11/19 10:42 PM, Mattis Lind via cctalk wrote:
The image is a backup tar archive. It do contain files of more private
nature. The backup is not complete since it spans two tapes. This means it
is not of huge interest to the public. The second tape has not been
recovered.
All files extracted has been listed on the web page. In case someone is
interested I could of course clean the archive from the private files.
A few years back AJ Palmgren helped me recover
data from a S8000 tape
using
his hacked QIC drive.
Did you ever put the tape images on line anywhere?
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15 comments
6 participants
participants (6)
-
aek＠bitsavers.org -
cclist＠sydex.com -
drb＠msu.edu -
mattislind＠gmail.com -
pat＠vax11.net -
vax11.net＠gmail.com