21 Apr
2011
21 Apr
'11
12:55 p.m.
I have encountered an old 14" disk drive - it looks like it is
probably a clone of an IBM 2314. It does not look like a 2314 at all
(it is plain blue box with, that sort of looks like a 2311, but with
more heads), and no tag at all. The drive interface uses that goofy
connector that the late 60s IBM drives standardized on, for talking to
the control units. The boards all have "CMS" stamped on them. Any
ideas? Was CMS, whoever they were, one of the early clone companies?
--
Will
1:42 p.m.
On 4/21/11 1:38 PM, Al Kossow wrote:
I thought he said (in the part you trimmed) that this was the
controller->drive interface. B&T would be the CPU->controller interface.
-Dave
--
Dave McGuire
Port Charlotte, FL
The drive
interface uses that goofy
connector that the late 60s IBM drives standardized on
Bus and Tag interface. 
3:21 p.m.
William Donzelli wrote:
The drive interface uses that goofy
connector that the late 60s IBM drives standardized on,
for talking to the control units.
Al Kossow wrote:
Bus and Tag interface.
Unless I'm terribly confused, "bus and tag" were the cables from the
mainframe's I/O channel to the control unit, not from the control unit
to the drive.
4:20 p.m.
These connectors are smaller than b&t, and are a weird mix of pins, blades,
and coax.
--
Will
On Apr 21, 2011 1:22 PM, "Eric Smith" <eric at brouhaha.com> wrote:
William Donzelli wrote:
The drive interface uses that goofy
connector that the late 60s IBM drives standardized on,
for talking to the control units.
Al Kossow
wrote:
Bus and Tag interface.
Unless I'm terribly confused, "bus and tag" were the cables from the
mainframe's I/O channel to the control unit, not from the control unit to
the drive.
4:44 p.m.
On 4/21/11 1:20 PM, William Donzelli wrote:
These connectors are smaller than b&t, and are a
weird mix of pins, blades,
and coax.
OK, the connectors I was thinking of were like page 1-2 of
TM114-1072-J-1M_Model_114_Tech_Oct73
The 114 calls the two cables DC (radial) and SIGNAL (BUSED). SIGNAL has bus and tag lines
and
the DC cable has the coax. They are similar to the Memorex cables with AMP connectiors
Tom
mentioned.
Weren't the cables from the CPU to Controllers "Channel" cables?
4:50 p.m.
On 4/21/11 4:44 PM, Al Kossow wrote:
I suspect that "bus and tag" is very, very different from the "bus
and tag" interface that connects CPUs to peripheral controllers. First
of all, the standardized IBM bus & tag interface doesn't have a radial
cable along with the bus & tag cables.
These
connectors are smaller than b&t, and are a weird mix of pins,
blades,
and coax.
OK, the connectors I was thinking of were like page 1-2 of
TM114-1072-J-1M_Model_114_Tech_Oct73
The 114 calls the two cables DC (radial) and SIGNAL (BUSED). SIGNAL has
bus and tag lines and
the DC cable has the coax. They are similar to the Memorex cables with
AMP connectiors Tom
mentioned. Weren't the cables from the CPU to Controllers
"Channel" cables?
They are "parallel channel" interfaces, which themselves consist of a
single "bus" cable and a single "tag" cable.
-Dave
--
Dave McGuire
Port Charlotte, FL
24 Apr
24 Apr
9:34 p.m.
OK, mystery solved with a simple unbuttoning of the skins - it is a
Calcomp 114D. For some reason, there was a bunch of General Automation
cards and docs inside, as well as a pack. Bonus.
And the mystery card reader turns out to be a CDC CE304.
--
Will
9:48 p.m.
On 4/24/11 6:34 PM, William Donzelli wrote:
OK, mystery solved with a simple unbuttoning of the
skins - it is a
Calcomp 114D. For some reason, there was a bunch of General Automation
cards and docs inside, as well as a pack. Bonus.
GA OEMed Calcomp drives. That's where the manual on bitsavers came from.
21 Apr
21 Apr
3:24 p.m.
No, not bus and tag. This is the interface between the drives and the
controllers. The connectors are quite different.
--
Will
On Apr 21, 2011 11:40 AM, "Al Kossow" <aek at bitsavers.org> wrote:
On 4/21/11 9:55 AM, William Donzelli wrote:
The drive interface uses that goofy
connector tha...
Bus and Tag interface.
4838
days inactive
4842
days old
9 comments
4 participants
participants (4)
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aek＠bitsavers.org -
eric＠brouhaha.com -
mcguire＠neurotica.com -
wdonzelli＠gmail.com