STAT.THD  --- Copyright 1988 by Phil Wheeler

An original compilation of Compuserve Model 100 Forum messages for use by
Forum members only.

This is a short collection of messages explaining some constraints in
setting the Telcom STAT in the 100/102/200, and explaining in detail the
meaning of the STAT parameters for the 200.  Good reference data!

Message range: 175108 to 175198
Dates: 10/3/88 to 10/4/88


Sb: #Tandy to Compaq
Fm: george Pickett 76137,2311
To:  76703,4062

Thanks for the help.  Sorry to be a pest, but I assume that to use the 200 to
upload a file to a PC, I need to enter communications parameters at the STAT
command.  Is it possible to tell me the syntax for them in this forum?
   If I follow you correctly, I enter TELCOM, then press F3 (STAT). Then the
parameters.  Do I ENTER them, or push F4 (TERM) to start the next step.  (What
is TERM?)  F# then uploads by name and F@ F2 downloads by name.  Press F? at
the end to terminate the transfer. Right?
   But I don't know the command syntax for entering the parameters.


Sb: #175108-#Tandy to Compaq
Fm: Tony Anderson 76703,4062
To: george Pickett 76137,2311

Your "Status" setting consists of 3 groups of characters, separated by commas.
To change or create your status setting, just press F3, and respond to the
prompt with the new setting.  Type it in, then press the ENTER key.  The first
group is 7 characters, selected from the following options:

First Character:        M = Modem (at 300 baud)
                        1 = 75 baud
                        2 = 110  "
                        3 = 300  "
                        4 = 600  "
                        5 = 1200 "
                        6 = 2400 "
                        7 = 4800 "
                        8 = 9600 "
                        9 = 19.6K "

Second Character:       6 = 6-bit words
                        7 = 7 bit  "
                        8 = 8-bit  "

Third Character:        I = Ignore parity
                        O = Odd      "
                        E = Even     "
                        N = None     "

Fourth Character:       1 = 1 stop bit
                        2 = 2  "    "

Fifth character:        E = Enable Xon/Xoff handshaking
                        D = Disable   "        "

Sixth Character: (Control Character filter)
                        N = Normal (filter off)
                        I = Ignore incoming Control Characters

Seventh Character: (Line Feeds added to incoming data)
                        N = No.  C/R = C/R
                        I = Yes. C/R = C/R + L/F

COMMA

Modem mode:             O = Originate
                        A = Answer

COMMA

Modem dial method:      10 = 10 pulses/sec
                        20 = 20    "
                        T = Tone dialing

The "normal recommended setting" for modem communications is M7I1ENN,O,T. This
indicates, Internal Modem, 7-bit words, Ignore parity, 1 stop bit, Xon/Xoff
handshaking enabled, No filter, No added line feed, Originate mode, and Tone
dialing.

When you press the ENTER key, it will return you to the TELCOM: prompt, where
you can then do something else.  If you get a beep, it means the computer did
not accept your parameter settings.

When you press F4 (Term), you go into terminal mode.  It is like a terminal
where you can type stuff and it is sent, or anything the other computer types
will show up on your screen.

F2 downloads to a file you name; Pressing F2 again aborts any download in
progress.  F3 uploads from a file you name.  Pressing BREAK will abort an
upload.


Fm: george Pickett 76137,2311
To: Tony Anderson 76703,4062

Thank you very much for taking the time to give me such complete and detailed
information.  I'll go to work on it.


Sb: #Modem Help
Fm: Tom Glovier 70346,1720
To: sysop

Can the M100's modem be set to 8 bits?  The book says it will go 6,7,or 8 bits,
but when I use STAT and enter 8 I get a "beep" and the setting in not accepted.
I can set is a setting M8I1E possable?

Also I saw a note in the message base about M200 answering the phone The M100
will not do this, will it?


Fm: Denny Thomas 76701,40
To: Tom Glovier 70346,1720

When you use 8 bit, the parity bit is not available for use, so you must use
M8N1E. I know, it would seem that [I]gnore would be just as valid as [N]o
parity, but I guess [I]gnore means that "I know it's there, but I'm not going
to do anything about it" while [N] makes all 8 bits available for transmission.


Fm: Wilson Van Alst 76576,2735
To: Tom Glovier 70346,1720

   The parity has to be set to N (none) for an 8-bit transfer.
   As in:
                M8N1E

   In computerese, the 8th bit (cleverly called bit-7, because the 1st bit is
called bit-0; got it?  Oh, yeah: and the bits are counted from right to left)
is used to _create_ parity for information coded into the other seven bits.
   The binary bit for the letter 'C' looks like:

        0  1  0  0  0  0  1  1

   You'll note that it has an odd number of 1's.
   If communications parity is set to "Even", the sending computer changes that
left-most (8th) bit to a 1, so that the total count of 1's is always even.
   The receiving computer checks every byte as it comes in -- and if it finds
one where the number of 1's is odd, it "knows" there has been a communications
error.
   Since the 8th bit is used for that rudimentary form of error-checking, it
clearly can't be used as part of the code for the actual character being sent;
so communication is limited to a range of 127 characters and control symbols (
the number of combinations you can achieve with 7 bits).

   With 8-bit communication, your range of symbols increases to 255.  But you
have to tell the computer that there is no parity to encode or interpret; thus,
None.


Fm: Tom Glovier 70346,1720
To: Denny Thomas 76701,40

Thanks, That helps a lot! the book does not explain a lot of things.


Fm: Tom Glovier 70346,1720
To: Wilson Van Alst 76576,2735

Thanks Van! It helps to know why things work the way they do.  Radio Shack
often does not tell the user much about how their products work. Thanks again.