The serial port has a 5v driver circuit so I’m told but I am not sure how to connect it. Apr 16, It has female Mini-DIN-8 sockets on each side hooked together, so it’s like a short female-to-female cable that breaks out access to each signal on a pin header and provides convenient locations for clipping onto ground. Well, I decided to mention this here as I noticed the thread got picked up a little bit over at 68kmla For the SCC chip using SDLC, I happened to find a document from zilog that is an application note on how to implement localtalk, including their development board code. The lowest rated, cheapest quality is the ADM Apparently the EuroBeeb card can be configured like this with a couple of jumpers.
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I’m glad someone is finally looking into it!
Standard Interface – e2v
I’ve been talking with the guys over at stardot the Acorn forum and the consensus is the port on this card should be electrically compatible with the BBC micro’s RS interface. Sep 30, The EtherWave will be helpful to look at because it is a working implementation of a LocalTalk-Ethernet bridge. Use 1 set as a transmitter, and another set as a receiver. The standard employs a single ended serial transmission scheme andand data rate are limited as the standard employs single ended communication which is susceptible to.
I think that document linked ljne techknight will help with configuring the SCC.
I soldered them to headers: I should be able to put this 2ls30 line with my EtherWave to get a much higher-quality signal. It has female Mini-DIN-8 sockets on each side hooked together, so it’s like a short female-to-female cable that breaks out access to each signal on a pin header and provides convenient locations for clipping onto ground.
For the SCC, I’m sure there’s a lot of timing requirements, but also keep in mind the 8mhz interfaced with the SCC for localtalk, so there might be tricks, but it doesn’t seem that bad It’s going to take some serious work to do anything with it, starting with lnie to it.
I even meandered the lline so they’re all the same length, although I don’t think it matters at this bit rate Should work, but it’s untested as of yet. May 20, 7: Here’s the first group of frames: I see no reason why it wouldn’t work. I just overlaid the PCB layouts for 4-pin, 6-pin, and 8-pin connectors on top of each other and the holes all overlap.
You can see it’s calculating the time between those two cursors as being I think some of the stuff that synchronizes to the frames is handled automatically by the SCC and it would take some work to replicate that logic. In fact, if I put the EtherWave into the special mode that I believe clocks the SCC faster, it fails to work through the extra long breakout cable.
The driver signal ap pears as a differential voltage to the line receiverwhile the noise signals appear as a common mode.
You may not need to change your board at all. May 29, The scope has a ton of memory so I can zoom in and see some pretty good detail. Here’s a zoomed version eliminating all of the emptiness on the right: Select a forum For longer line lengths and higher datasingle ended interface the standard specifies a maximum line length of 6 metres.
It may not be entirely applicable, since the avpn does a sort of NATing, but it doesn’t seem too bad. Finally, here’s a byte between my vertical cursorsor 0x02 — remember the bits are sent LSB first, this threw me off for a while! I’m going off this http: I won’t have use for all three. Well, I decided to mention this here as I 26ls300 the thread got picked up a little bit over at 68kmla For the SCC chip using SDLC, I happened to find a document from zilog that is an application note on how to implement localtalk, including their development board code.
If I can find some sort of smaller Mini Din-8 breakout board or something, I’ll definitely grab one. If we multiply that by 8, we get Yesterday 26ls0 designed and ordered my own Mini-DIN-8 breakout board because I couldn’t find anything that would fit my needs.