31 Jan
2008
31 Jan
'08
12:07 a.m.
Date: Wed, 30 Jan 2008 14:16:32 -0500
From: scheefj at netscape.net
What is the desired end result? What is the
application? A simple
application may not need a "real" networking protocol. If "cluster"
means distributed processing, then you have a lot more than just
protocols to figure out.
You know, a $2 PIC (e.g. 18F2580) MCU implements CAN. It's not
really fast(CAN, not the PIC) but it keeps your car going. A minimum
of external components required. You even get a bunch of other neat
stuff thrown in (USART, timers, ADC, etc.). All in a 28 pin skinny
DIP or QFN.
(Dodging brickbats, for not keeping things contemporaneous)
Cheers,
Chuck
31 Jan
31 Jan
8:22 a.m.
Chuck Guzis wrote:
You know, a $2 PIC (e.g. 18F2580) MCU implements CAN.
It's not
really fast(CAN, not the PIC) but it keeps your car going. A minimum
of external components required. You even get a bunch of other neat
stuff thrown in (USART, timers, ADC, etc.). All in a 28 pin skinny
DIP or QFN.
(Dodging brickbats, for not keeping things contemporaneous)
I looked at that (Actually, I looked at AVR8 CAN variants), but I
thought I'd try to find an all C64 option for Sellam. I like the uC
approach, as it offloads a lot of the networking from the main machine
(like the original ARPANET had those boxes that bridged the net to the
machine, can;t remember the term for them).
I think Sellam preferred the C64 only approach so folks could replicate
it more easily.
Jim
--
Jim Brain, Brain Innovations (X)
brain at jbrain.com
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times!
Home: http://www.jbrain.com
8:30 a.m.
On Jan 31, 2008 8:22 AM, Jim Brain <brain at jbrain.com> wrote:
Chuck Guzis wrote:
[snip]
The boxes were called IMPs (Interface Message Processors).
John
--
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn
You know, a $2 PIC (e.g. 18F2580) MCU implements
CAN. It's not
really fast(CAN, not the PIC) but it keeps your car going. A minimum
of external components required. You even get a bunch of other neat
stuff thrown in (USART, timers, ADC, etc.). All in a 28 pin skinny
DIP or QFN.
(Dodging brickbats, for not keeping things contemporaneous)
I looked at that (Actually, I looked at AVR8 CAN variants), but I
thought I'd try to find an all C64 option for Sellam. I like the uC
approach, as it offloads a lot of the networking from the main machine
(like the original ARPANET had those boxes that bridged the net to the
machine, can;t remember the term for them).
12:33 p.m.
On Thu, Jan 31, 2008 at 10:22:37AM -0600, Jim Brain wrote:
Chuck Guzis wrote:
>You know, a $2 PIC (e.g. 18F2580) MCU implements CAN. It's not
>really fast(CAN, not the PIC) but it keeps your car going. A minimum
>of external components required. You even get a bunch of other neat
>stuff thrown in (USART, timers, ADC, etc.). All in a 28 pin skinny
>DIP or QFN.
Interesting suggestion - we have a number of VME crates with CAN bus
capability - not the CPUs on the VME bus, the crates themselves... I
think it's used for environmental monitoring and control in this
application.
I looked at that (Actually, I looked at AVR8 CAN
variants), but I
thought I'd try to find an all C64 option for Sellam. I like the uC
approach, as it offloads a lot of the networking from the main machine
(like the original ARPANET had those boxes that bridged the net to the
machine, can;t remember the term for them).
IMPs - Internet Message Procesors. I'm blanking on the first generation
hardware, but later IMPs were PDP-11-based.
I think Sellam preferred the C64 only approach so
folks could replicate
it more easily.
Certainly, the less external hardware, the more likely someone else will
give it a go. If the end result is an application that will run on, say,
eight C-64s, I might try it when I get home. If it's more of a 32-minimum
or 64-minimum, that's a bit more hardware than I have access to.
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 31-Jan-2008 at 20:20 Z
South Pole Station
PSC 468 Box 400 Temp -39.5 F (-39.7 C) Windchill -61.9 F (-52.2 C)
APO AP 96598 Wind 6.8 kts Grid 353 Barometer 680.6 mb (10606 ft)
Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html
1:02 p.m.
On Jan 31, 2008 12:33 PM, Ethan Dicks <ethan.dicks at usap.gov> wrote:
On Thu, Jan 31, 2008 at 10:22:37AM -0600, Jim Brain
wrote:
IIRC, the first IMPs were based on the Honeywell 516. I actually just
finished a history book about ARPANET so I think that's right :)
John
--
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn
I looked at that (Actually, I looked at AVR8 CAN
variants), but I
thought I'd try to find an all C64 option for Sellam. I like the uC
approach, as it offloads a lot of the networking from the main machine
(like the original ARPANET had those boxes that bridged the net to the
machine, can;t remember the term for them).
IMPs - Internet Message Procesors. I'm blanking on the first generation
hardware, but later IMPs were PDP-11-based.
5952
days inactive
5952
days old
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