Date : Fri, 30 Oct 2020 13:07:48 +1100
From : ajw@... (Alan Williams)
Subject: Econet via Ethernet & PC
Phil,
I would be interested in a look at that.? I trawl opencores every now and
then looking for an ADLC that might be pressed into service with a 6502 in
an FPGA.? I have a TinyFPGA BX (https://tinyfpga.com/) which I hope to use.?
I have never done any FPGA stuff before so progress is likely to be slow!
My idea is to implement an ADLC + 65SC12 + USB DMA & status registers.?
Then run the Ecolink software on it effectively making a USB Econet interface.?
I was going to simplify the Econet line driver side to just RS485 & scrap
collision detection.? Econets are small enough these days to not care about that.
The board would probably include optional termination and clock generation
so a minimalist network of one ?Econet machine would need no other increasingly
ancient and unreliable parts.
With no previous experience with VHDL or Verilog starting with an ADLC seems
a bit like the jumping in at the deep end.
Alan
From: <bbc-micro-bounces+ajw=bigblue.net.au@...> on behalf
of Phil Blundell <pb@...>
Date: Thursday, 29 October 2020 at 9:26 pm
To: <bbc-micro@...>, Chris Johns <chris@...>
Subject: Re: [BBC-Micro] Econet via Ethernet & PC
The 68B54 bus interface isn't a very good fit for a PIC. I had a go at doing
it with an AVR a few years ago and it was a pain.
I keep meaning to dust off the latest iteration of my Econet interface which
uses a little FPGA to replace the ADLC. Any assistance with that project
welcome ?
p.
On 29 October 2020 10:09:16 GMT, Chris Johns <chris@...> wrote:
I would imagine a PIC could interface to the master type Econet and provide
a USB interface, or even direct to Ethernet.
If a Pi could cope with the interrupt response needed (the ADLC has I think
2 bytes of buffering so you need to be quick, that said a Pi is what 1.3GHz
thesedays and the BBC was 2Mhz) you could probably build one into a fileserver
with an Econet 'HAT'
Cheers
Chirs
On 29/10/2020 08:48, Alan Williams wrote:
It?s hard without an Econet interface for your PC* or an Econet<->AUN bridge
in dedicated hardware.
A USB Econet interface would be an idea, some are rumoured.
I have not tested this Arduino Filestore idea. (I want to get my real Filestores
running again, & I think a PI might be a better platform for this kind of thing)
https://stardot.org.uk/forums/viewtopic.php?t=13940
I believe you can run AUND on Linux to serve NetFS Archimedes clients but
that code doesn?t include support for 6502 clients since connecting them
isn?t practical.
*Even if you have an Ecolink card its hard to find an ISA slot these days
and it never did run a fileserver on dos 3.21.
Alan
From: <bbc-micro-bounces+ajw=bigblue.net.au@...> on behalf
of <lug@...>
Date: Thursday, 29 October 2020 at 7:27 pm
To: 'BBC Micro Mailing List' <bbc-micro@...>
Subject: [BBC-Micro] Econet via Ethernet & PC
Hi all
There?s quite a bit of modern stuff around for the BBC (Datacentre, SPI,
RPi0 etc etc) but has anyone done anything clever with Econet? About 10
years ago, I put together a sort of Econet with a clock box, a BBC Model
B (with Econet), an A5000 (with Ethernet and Econet) and lashed together
a means by which I could create an image with ADFS Explorer on the PC and
use the A5000 as a sort of bridge to move the stuff to the Model B.
The trouble was, work though it did, it was a bit clunky (and didn?t handle
the execution address for each file brilliantly). Is there a way, for example,
of having a Beeb look to a PC for its Station 254? Presumably the PC would
have to be running BeebEm or something similar.
Cheers
R
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