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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Agafaster on August 21, 2006, 02:24:26 PM
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Just out of interest, does anyone know technical info on the clockport ?
particularly, how much bandwidth can it provide ?
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All I know is that it can support > 115K as Silversurfer can run at this speed and maybe faster. I guess that Delfina requires it to run much faster than this ?
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I did manage to find out some bits and pieces about the clockport - it is an 8 bit interface, I believe it can cope with perhaps 2MB/s (which would figure given the Subway USB), also the Hypercoms could do 450kilobits/sec too.
my line of thought was putting a 10/100base-2 on there direct, or USB and a USB-Ethernet adaptor on me 1200.
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you mean something like this (http://users.hol.gr/~amije/usb2ethernet.jpg) :-) i try it with my subway. poseidon recognise it but there isn't any proper .class available.
the comment of Chris Hodges for it is:
> Uhm, that's the Ethernet adapter again (BTW: I've got an adapter with a similar chipset, so the chances are not that bad for support sometime).
:flame:
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yup! something like that - I was actually looking at the Belkin one though.
oh - can one do PPP over a USB cable ? that would remove the need for the
Ethernet dongle...
(my Other Amiga is an A1XE ;-) )
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The theoretical maximum throughput of the 8 bit clockport is 3.5 million bytes/sec but this will never be achieved without DMA.
The clock port is 8 bits wide, and hangs off the 14 MHz 68020 bus. It takes 4 clock cycles to access this port so 14/4 = 3.5 Meg but I am unsure if you need to add another 4 clock cycles for MC68020 operation, if so this would reduce the bandwidth to 1.75 MByte/sec. My A1200 and logic analyser are too far apart to check this ;)
I collected some note, a long time ago and put them on Aminet at http://de5.aminet.net/hard/hack/clock_port.txt (http://de5.aminet.net/hard/hack/clock_port.txt)
Have fun,
Ian
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funnily enough, it was your site I was looking at !
I'm just a little halfarsed and haphazard in me research!
(besides, its only a thought experiment at the mo!)
I am also looking at Ethernet controller ICs - farnell have some interesting candidates...
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I am also looking at Ethernet controller ICs - farnell have some interesting candidates...
The most interesting (only 10mbps though) ethernet chip Ive seen (and bought) was the CP2200 from Silicon Laboratories Inc. (Available from Digikey)
It looks nice and easy to use.
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My main A1200 is a rev1.A and doesn't have the clockport pins... i wonder if i can put them and use it :roll:
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@Oli_hd
so nothing concrete yet then ?
nowt set down in PCB ?
subtle hint !
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I hope you can make something like that and provide a good design. I'd like to have such a device too!
:crazy: Me thinking of A500 with clockport adapter and ethernet!!!
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@CLS2086: on the manual of my subway it was writen something about this. i think an email at e3b (http://www.e3b.de/usb/index_e.html) won't harm :-)
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or at amigakit.com
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so nothing concrete yet then ?
nowt set down in PCB ?
LOL, nope nothing even sketched out on a piece of paper, sorry.
I actually went for the 28 pin QFP version without looking at the difference so now I have a multiplexed bus to deal with. :(
on the up side its a tiny chip, 5mmx5mm, breath in to hard and you will be passing ethernet chips for a month. ;-)
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I was hoping to find something in a 0.1" DIL, to make it easier on me - havent done PCBs since well school, really!
hoped I might -ahem- 'prototype' on veroboard ! ;-)
I'd rather that happened with 5mm QFP than a 3cm DIL!