On Mon, Sep 21, 2020 at 1:07 PM Tom Wilson wrote:
> If so, it would be easier to just use a USB serial port. The Prolific
> and FTDI ports both work with Raspbian; I've used both.
>
>>
>>
+1, Agree
And if you're buying one, I recommend to buy one with an FTDI chip.
-- John.
A little younger but still an amazing early 80s device, the Psion Organiser II
is an interesting device and a lot of fun to play around with.
I have a standard series three, I sent it off and had it refurbished. The
hinges are the most common thing to go and the video ribbon cable between the
Some tips on that
Are you using Linux on the Pi? If so, it would be easier to just use a USB
serial port. The Prolific and FTDI ports both work with Raspbian; I've used
both.
Otherwise, maybe look at a DTE wired level converter with CTS/RTS like
this one:
Love the Psion 3c I had but the case literally disintegrated. Had some type
of soft plastic that just corroded and fell apart.
On Monday, September 21, 2020, 03:24:59 PM EDT, james.z...@gmail.com
wrote:
The 5mx is a nice machine, I reviewed and tested several Psion devices. The
The 5mx is a nice machine, I reviewed and tested several Psion devices. The
company was often said to be the UK version of Apple for their innovative
devices, programming language. I still have a soft spot for the series 3.
Sent from my iPad
> On 21 Sep 2020, at 8:10 pm, Jonathan Yuen
Hello,
I actually am trying to connect a Psion 5MX with it's 'serial cable' to a
raspberry pi, the serial lines on the GPIO thing. The pi is TTL, so I have an
adapter to change it to RS-232. The adapter is DCE, but the Psion cable
actually terminates as DCE, since it was made to plug into
"Null" means "none" or "zero." So "null modem" means "no modem."
This term is an adjective and should be coupled with "cable", "adapter", or
some other noun to be of any use.
I don't see a need to re-define the term, since "null modem cable" is well
established, and we all know exactly what the
I've always thought "null modem" was a misnomer. It probably should have
been called a "non modem cable" or simply a cross over cable as mentioned
above.
On Mon, Sep 21, 2020, 11:06 RETRO Innovations wrote:
> On 9/21/2020 10:59 AM, Jonathan Yuen wrote:
> >
> > That said, I could only think that
On 9/21/2020 10:59 AM, Jonathan Yuen wrote:
That said, I could only think that the other wiring should be same as a null
modem, but I thought that I should air my thoughts to see what other people
think.
I'm curious about the use case, but you are correct, the wiring would be
the same.
I suppose anything that takes the place of a modem, but neither modulates
nor demodulates would be a null modem. :)
On Mon, Sep 21, 2020, 11:59 Jonathan Yuen wrote:
> Hello,
>
> This is really not an M100 thing but I need to connect two pieces of
> equipment together that are both wired as DCE.
Hello,
This is really not an M100 thing but I need to connect two pieces of equipment
together that are both wired as DCE. I've bought two DB-9 plugs (male) that
I'll wire together and I've already tested crossing 2 and 3 (2 goes to 3, 3
goes to 2) and 5 (gnd) is straight across and that
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