15 Mar
15 Mar
3:07 p.m.
I'm not familiar with an RF-71. What machine did it go with and what
interface did it use? I didn't see any docs on bitsavers for RF
discs.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
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Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
10:24 a.m.
I have no idea. This is all that I found. It has a long connector on the
back end with three rows of female contacts (80 contacts total). That's the
only connector on it.
Joe
At 01:07 PM 3/15/06 -0700, you wrote:
I'm not familiar with an RF-71. What machine did it go with and what
interface did it use? I didn't see any docs on bitsavers for RF
discs.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
8:30 p.m.
Here's the ugly details...enjoy! :-)
disk cap. sec/trk trk/cyl cyl notes interface
RF71 390M 37 16 1320 5.25" FH DSSI/MSCP
On Wed, 15 Mar 2006 15:24:22, Joe R. <rigdonj at cfl.rr.com> wrote:
I have no idea. This is all that I found. It has a
long connector on the
back end with three rows of female contacts (80 contacts total). That's the
only connector on it.
Joe
3:22 p.m.
I'm not familiar with an RF-71. What machine did
it go
with and what interface did it use?
The interface was DSSI, which appears to have been loosely
based on SCSI (except more tightly specified than SCSI
was at the time). It allowed a sort of "poor-man's cluster"
to be built without having to purchase expensive HSCs etc.
I didn't see any docs on bitsavers for RF discs.
Search for "RF7" and "RF3" on Manx (vt100.net/manx)
and you'll find some stuff on the net. I've sent a
load more stuff to the Manx maintainer recently so
I expect a bit more will crop up soon.
Antonio
--
Antonio carlini
arcarlini at iee.org
16 Mar
16 Mar
4:55 a.m.
On Wed, 15 Mar 2006 20:22:36 -0000
"Antonio Carlini" <a.carlini at ntlworld.com> wrote:
The interface was DSSI, which appears to have been
loosely
based on SCSI (except more tightly specified than SCSI
was at the time). It allowed a sort of "poor-man's cluster"
to be built without having to purchase expensive HSCs etc.
I may be wrong, but
AFAIK:
DSSI is not even loosely related to SCSI. DSSI is a complete CI
implementation, but uses a parallel bus cable instead of coax cable and
a star coupler as physical transport. Even the DSSI adapter is software
compatible to the CI adapter. SCSI is a mass storage interface where
DSSI is more some kind of a SAN.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
1:28 p.m.
DSSI is not even loosely related to SCSI.
DSSI is a complete CI implementation, but uses a parallel
bus cable instead of coax cable and a star coupler as physical
transport.
The DSSI spec (or the nearest thing I have to it) says otherwise.
The physical layer (bus signals, low level protocol, bus
phases etc.) are all either taken directly from SCSI or are
a slightly modified version.
Even the DSSI adapter is software compatible to the CI
adapter.
True
SCSI is a mass storage interface where DSSI is more
some kind of a SAN.
DSSI certainly supports SCA but if you look at the SII I'm
sure you'll find that it can do both SCSI and DSSI. I'd be
even more sure if I had an SII spec.
Antonio
--
Antonio carlini
arcarlini at iee.org
17 Mar
17 Mar
4:32 p.m.
On Thu, 16 Mar 2006 18:28:09 -0000
"Antonio Carlini" <a.carlini at ntlworld.com> wrote:
Interresting. I did not know this. Now I remember. I
have two PCI DSSI
adapters that are based on the NCR / Symbios 53C825 Wide SCSI chip. But
what I had in mind when I wrote the above was...
that DSSI supports SCA. That is more
remarkable then the physical layer.
Sorry for the confusion. I refered to the protocol / software features
and ignored the physical specifications.
DSSI is not
even loosely related to SCSI.
The DSSI spec (or the nearest thing I have to it)
says otherwise.
The physical layer (bus signals, low level protocol, bus
phases etc.) are all either taken directly from SCSI or are
a slightly modified version. SCSI is a mass
storage interface where DSSI is more some kind of a
SAN.
DSSI certainly supports SCA but if you look at the SII I'm
sure you'll find that it can do both SCSI and DSSI. I'd be
even more sure if I had an SII spec.
AFAIK SSI is a very dump device that mostly
does only PIO. So everything
else is done in software.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
10:46 p.m.
On 3/18/06, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
Interresting. I did not know this. Now I remember. I
have two PCI DSSI
adapters that are based on the NCR / Symbios 53C825 Wide SCSI chip. But
what I had in mind when I wrote the above was...
Even more interesting is the existence of PCI-based DSSI adapters??!!!
I didn't know this.
Pray tell more. Pictures, specs, brand/model, etc.
In the same vein, dare I ask: Is there a PCI-based UDA clone or a RQDX clone?
18 Mar
18 Mar
1:34 a.m.
On 3/17/06, Wai-Sun Chia <waisun.chia at gmail.com> wrote:
On 3/18/06, Jochen Kunz <jkunz at unixag-kl.fh-kl.de> wrote:
There was one with pictures on ebay not long ago. Actually there are two on
ebay right now without picture.
In the same vein, dare I ask: Is there a PCI-based UDA clone or a RQDX
Interresting. I did not know this. Now I
remember. I have two PCI DSSI
adapters that are based on the NCR / Symbios 53C825 Wide SCSI chip. But
what I had in mind when I wrote the above was...
Even more interesting is the existence of PCI-based DSSI adapters??!!!
I didn't know this.
Pray tell more. Pictures, specs, brand/model, etc. clone?
1:39 p.m.
In article <ddc584f50603172234m327d8062l6c2a35bc3b6eadcb at mail.gmail.com>,
"9000 VAX" <vax9000 at gmail.com> writes:
There was one with pictures on ebay not long ago.
Actually there are two on
ebay right now without picture.
Speaking of the two on ebay, that seller has (what seems to me to be)
very high prices on their items. I've had their stuff on a watch list
for months and it never sells. Does anyone buy stuff from them?
Their descriptions are nothing more than part numbers, they rarely
have photos and the prices seem high. (They also seem determined to
give me the impression that other people sell similar parts that are
not "genuine parts".) Has anyone ever purchased anything from them?
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
2:03 p.m.
Speaking of the two on ebay, that seller has (what
seems to me to be)
very high prices on their items. I've had their stuff on a watch list
for months and it never sells. Does anyone buy stuff from them?
Their descriptions are nothing more than part numbers, they rarely
have photos and the prices seem high. (They also seem determined to
give me the impression that other people sell similar parts that are
not "genuine parts".) Has anyone ever purchased anything from them?
Not me. Another example of why I wish eBay would let buyers filter out
certain sellers :-). These guys have become a significant fraction of
my "false positives" when I search eBay.
I don't know if their business plan is working for them, or not. I imagine
a lot of similar stock sits around in "call for price" stores for months at
a time. I assume this is one of those, who is trying out online sales.
(If I have to call them, I don't consider it an online sale.)
Vince
3:01 p.m.
In article <BAY0-SMTP024C34B6F816C1CBBF35F1B2E50 at phx.gbl>
<02a001c64abe$9d525c60$6700a8c0 at vrs>,
"vrs" <vrs at msn.com> writes:
[...] Has anyone ever purchased anything from them?
Not me. Another example of why I wish eBay would let buyers filter out
certain sellers :-). These guys have become a significant fraction of
my "false positives" when I search eBay.
I agree. This seller comes up on several of my searches based on them
adding new items to their online store. However, I can always spot
them because its things like "VT100 main board, untested, $500".
It would be better if they at least offered a "make best offer" option
on their items, but they are all buy-it-now with really high prices.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
11:25 p.m.
On 3/19/06, vrs <vrs at msn.com> wrote:
Not me. Another example of why I wish eBay would let
buyers filter out
certain sellers :-). These guys have become a significant fraction of
my "false positives" when I search eBay.
Tell me about it! Why, the other day I just said "Enough is enough"!
I promptly sat down and had to spent some time just to figure out how
to filter a particular seller from your eBay search...
Hey it works! Now I am "it_equipment_xpress"-free!!! :-)
21 Mar
21 Mar
4:06 a.m.
On Sat, 18 Mar 2006 11:46:37 +0800
"Wai-Sun Chia" <waisun.chia at gmail.com> wrote:
Even more interesting is the existence of PCI-based
DSSI adapters??!!!
Well. DSSI was still in use when PCI based Aphas had replaced
VAXen. I
got mine out of two AlphaServers that where VMS clustered together. They
used DSSI to connect to two RAID arrays with several dozend 4 GB SCSI
disks and two SCSI to DSSI RAID controllers. Some HSZ-/HSD-somthing in a
BA350 like storage works shelf. In short: A "low boy" rack full of
storage works shelfs filled with disks and RAID controllers.
Pray tell more. Pictures, specs, brand/model, etc.
I don't have pictures. They look like an ordinary NCR / Symbios 53C825
based PCI SCSI adapter. Nothing special on that hardware. The
interresting part is the software. The NCR / Symbios 53C825 has a
programmable RISC (?) CPU core inside. The SCSI protocol seems to be
implemented by programming this CPU with apropriate micocode. As Antonio
pointed out the physical characteristics of SCSI and DSSI are similar.
So all DEC needed was to programm a micocode that talks DSSI instead
SCSI. And yes, it was an official DEC product.
In the same vein, dare I ask: Is there a PCI-based UDA
clone or a RQDX
clone?
A PCI to SDI or a PCI to MFM adapter / controller? Not that I am aware
of. And I doubt that this exists. MFM and SDI where dead when PCI got
comon.
--
tsch??,
Jochen
Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/
7:14 p.m.
In article <44189445.80203 at gmail.com>,
Sridhar Ayengar <ploopster at gmail.com> writes:
Richard wrote:
Well hey, whaddya know. I have a VAX with a DSSI interface :-). I
was wondering if the picture was showing the DSSI style sled on it.
My DSSI slots are full, but I gather the TKZ70 tape drive isn't very
useful... maybe I could put another drive in that bay?
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
I'm not familiar with an RF-71. What machine
did it go with and what
interface did it use? I didn't see any docs on bitsavers for RF
discs.
It's mostly used with VAXen. It has a DSSI interface. 
8:02 p.m.
Richard wrote:
In article <44189445.80203 at gmail.com>,
Sridhar Ayengar <ploopster at gmail.com> writes:
I've done it before. It takes a bit of finagling, but it's possible.
Peace... Sridhar
Richard wrote:
Well hey, whaddya know. I have a VAX with a DSSI interface :-). I
was wondering if the picture was showing the DSSI style sled on it.
My DSSI slots are full, but I gather the TKZ70 tape drive isn't very
useful... maybe I could put another drive in that bay? I'm not familiar with an RF-71. What machine
did it go with and what
interface did it use? I didn't see any docs on bitsavers for RF
discs.
It's mostly used with VAXen. It has a DSSI interface.
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17 comments
8 participants
participants (8)
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a.carlini＠ntlworld.com -
jkunz＠unixag-kl.fh-kl.de -
legalize＠xmission.com -
ploopster＠gmail.com -
rigdonj＠cfl.rr.com -
vax9000＠gmail.com -
vrs＠msn.com -
waisun.chia＠gmail.com