I’ve run into this before with the 200 – I don’t remember if it was CTS or DSR
or both that it wants to see asserted, but it definitely does behave
differently from the 100 and 102. If you don’t have one or both of those lines
high, the 200 appears to freeze up if you attempt serial communication using
TELCOM (ctrl-Break recovers). The 100 and 102 (at least in TELCOM) don’t seem
to care.
There’s no real harm in jumpering both of these signals high if your wifi modem
isn’t actively asserting either of them. In a DB9 you would jumper 7 (RTS) to
8 (CTS) and 4 (DTR) to 6 (DSR). In a DB25 those would correspond with 4 to 5
and 20 to 6.
jim
From: M100 <[email protected]> On Behalf Of B 9
Sent: Wednesday, December 21, 2022 11:06
To: [email protected]; Joseph Colson III <[email protected]>
Subject: Re: [M100] Model 200 issues with Serial Wi-Fi Adapter
CAUTION External Sender: Do not click links or open attachments unless you
recognize the sender and know the content is safe.
That is odd. Handshaking and Carrier Detect can cause peculiar problems, but
I'm wondering if maybe something else is wrong with the serial port.
I have a Tandy 200 and my belief is that the the serial port is the same as the
102 (which came later). The only difference I know of is that one needs to add
the extra letters "NN" to TELCOM's `STAT` command. (For example, `STAT 98N1ENN`
instead of `STAT 98N1E`). If you forget the extra letters, TELCOM will silently
ignore the setting.
[image.png]
Does your Tandy 200's serial port work when connecting to anything else? For
example, to your Tandy 102 via a null modem?
—b9
On Wed, Dec 21, 2022 at 8:29 AM Joseph Colson III
<[email protected]<mailto:[email protected]>> wrote:
I have been using a seral Wi-Fi modem with my Model 102 without much fuss for
the past few days. I switched it over to the Model 200 and no matter what I
did I could not get it to work. I searched the boards and found plenty of
discussion on flow control on the WiFI232 modem. While I don’t understand it
completely, the Model100/102 does not require it while the Model 200 does. The
Wifi232 has solderable jumpers to fix this issue. The board I’m using does
not have this, so I was considering jumping pins on the DB9 side of the device,
however I’m not completely sure what I’m supposed to JUMP. I don’t know if
all that made much sense. Hopefully, someone can decipher what am asking.
Any Help would be appreciated,
Joe
