19 Jan
2012
19 Jan
'12
5:01 p.m.
From:?silvercreekvalley <silvercreekvalley at
yahoo.com>
Date:?Thu, 19 Jan 2012 03:23:18 -0800 (PST)
Subject:?Sun 1 optical mouse
I have a few early Sun mice. These all have 3 buttons and a black case. The logo on the
front
is the usual Sun diamond but is more of a blue colour rather than the later purple.
I have one of those, made by Mouse Systems. It has the RJ-11 connector.
Does anyone know if Sun's ever supported 3MBit
ethernet?
I have a PDF file of a 1982 Sun manual titled SUN 3MBit Ethernet Board.
I think that the Ethernet board in my Sun 2/120 is jumperable 3MBit/10MBit.
--
Michael Thompson
20 Jan
20 Jan
8:32 a.m.
New subject: 3MBit Ethernet (was Re: cctech Digest, Vol 101, Issue 31)
On 1/19/12 5:01 PM, Michael Thompson wrote:
I have a PDF file of a 1982 Sun manual titled SUN
3MBit Ethernet Board.
Are there any differences with what I have on bitsavers?
I think that the Ethernet board in my Sun 2/120 is
jumperable 3MBit/10MBit.
There were two different boards. They used 3Com for 10mbit and the Stanford
design for 3. Very few people deployed 3mbit Ethernet. The main use by the
time of the Sun Microsystems workstation was to be able to print at CMU, Stanford
and MIT using the Xerox Dover laser printers from the Xerox Educational grant
of Altos and Dovers to those universities.
12:25 p.m.
New subject: 3MBit Ethernet (was Re: cctech Digest, Vol 101, Issue 31)
From: Al Kossow
Sent: Friday, January 20, 2012 8:32 AM
On 1/19/12 5:01 PM, Michael Thompson wrote:
> I have a PDF file of a 1982 Sun manual titled SUN
3MBit Ethernet Board.
>
Are there any differences with what I have on
bitsavers?
> I think that the Ethernet board in my Sun 2/120 is
jumperable 3MBit/10MBit.
There were two different boards. They used 3Com for
10mbit and the
Stanford design for 3. Very few people deployed 3mbit Ethernet. The
main use by the time of the Sun Microsystems workstation was to be
able to print at CMU, Stanford and MIT using the Xerox Dover laser
printers from the Xerox Educational grant of Altos and Dovers to those
universities.
The entire Stanford backbone was 3Mbit when I got there in 1984, and
there were TOPS-20 applications for telnet, FTP, SMTP, print services,
and several other services I'm not remembering right at the moment.
I installed a 10MBit interface into one of our DEC-20s at LOTS with
advice from Len Bosack (still at SCORE at the time).
PUP (PARC Universal Packets, the 3Mbit layer 2/3) was extended to 10Mbit
at Stanford and used for several years in addition to TCP/IP, mostly at
LOTS because the kiddies weren't allowed on the Internet until c. 1988.
Rich Alderson
Vintage Computing Sr. Systems Engineer
Vulcan, Inc.
505 5th Avenue S, Suite 900
Seattle, WA 98104
mailto:RichA at vulcan.com
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/
1:22 p.m.
New subject: 3MBit Ethernet (was Re: cctech Digest, Vol 101, Issue 31)
On 1/20/2012 11:32 AM, Al Kossow wrote:
Very few people deployed 3mbit Ethernet.
Must be the case. I did network support for 11+ years and dealt with
literally thousands of different network setups that were around for a
long time. Saw plenty of token ring, thick(with vampire taps, of
course) & thinnet installations, twinax/coax mainframe configurations,
arcnet, amongst others.
I'm not sure if I ever even heard a passing comment about 3mbps --- Must
have been fairly unpopular(by then) for me not to run into it at least
once. This was 15+ years ago.....
Keith
1:37 p.m.
New subject: 3MBit Ethernet (was Re: cctech Digest, Vol 101, Issue 31)
Keith Monahan wrote:
I'm not sure if I ever even heard a passing
comment about 3mbps --- Must
have been fairly unpopular(by then) for me not to run into it at least
once. This was 15+ years ago.....
15 years ago is *modern* times as the history of Ethernet goes. 3Mbps
well on its way out 10 years before that.
Note that 3Mbps Ethernet was only a defacto standard. The first industry
standard was for 10Mbps, adopted in 1980, and the IEEE standard wasn't
published until 1985.
1:58 p.m.
New subject: 3MBit Ethernet (was Re: cctech Digest, Vol 101, Issue 31)
On 1/20/12 1:37 PM, "Eric Smith" <eric at brouhaha.com> wrote:
Keith Monahan wrote:
Keep in mind that the original Ethernet, on the Xerox Alto, was driven
directly by the microcode engine. Ethernet was one of several
cooperatively multitasked 'tasks' in the microcode, others including disk
access, drawing the screen and refreshing dynamic RAM. I'm convinced it
was 3Mb/s because that was the fastest they felt could be supported
without bringing everything else to a crawl. Considering later standards
such as ARCnet (at 2.5Mb/s), it's my opinion they were wild optimists.
:-) -- Ian
I'm not sure if I ever even heard a passing
comment about 3mbps --- Must
have been fairly unpopular(by then) for me not to run into it at least
once. This was 15+ years ago.....
15 years ago is *modern* times as the history of Ethernet goes. 3Mbps
well on its way out 10 years before that.
Note that 3Mbps Ethernet was only a defacto standard. The first industry
standard was for 10Mbps, adopted in 1980, and the IEEE standard wasn't
published until 1985.
4672
days inactive
4672
days old
5 comments
6 participants
participants (6)
-
aek＠bitsavers.org -
eric＠brouhaha.com -
IanK＠vulcan.com -
keithvz＠verizon.net -
michael.99.thompson＠gmail.com -
RichA＠vulcan.com