Owner`s manual

Page 5-5Defining Terminals
5.3.4In-width
The in-width statement specifies the maximum terminal line-width allowed before a
carriage return. Allowing a large width, such as 100, gives an added margin of safety
when typing long lines.
5.3.5In-buffer
There are times when the computer cannot immediately process characters you type
from the keyboard. Instead, it stores the characters in an input buffer until it can get
around to them. The in-buffer statement specifies the size of this buffer. The number
you specify, then, is also the number of characters you can type ahead of the computer
before it starts to discard characters. When you’ve reached the end of the type-ahead
buffer, the computer echoes any additional characters as bell codes and discards them.
If you want to be able to type ahead a full line, make this parameter at least as large as
the in-width value.
5.3.6Out-buffer
The out-buffer statement specifies the size of the terminal output buffer. This is the
buffer holding characters the computer sends to the terminal. The terminal empties this
buffer at its own speed. The computer allocates two output buffers of the size specified
in the out-buffer statement. It allows a job to stay active until it fills these buffers; then
the job is put into the terminal output wait state. In general, specify larger output buffers
for faster terminals, and specify smaller output buffers (perhaps only ten characters or
so) for slower terminals.
For more details on these input and output buffers, see the section on the terminal
service system in the AMOS Monitor Calls Manual
The monitor size is increased as buffers are increased.
5.4EDITOR
The EDITOR statement activates the AMOS command line editor, which allows you to
edit your command lines at AMOS command level. If you include an equal sign
followed by a number, the line editor will also allow you to "call back" previous command
lines for re-editing and/or re-execution. The number specified tells AMOS how many of
the previous command lines you would like to be able to recall—for example,
EDITOR=5 would allow you to call back any of the last five commands you entered.
When you define the EDITOR, remember each "call back" line uses memory space, so
you may not want to define more lines than you normally use.
If I/O Redirection is to be used with the AMOS line editor, you must not have a TRMDEF
statement with buffers larger than 200 bytes or specifying more than 20 command lines
to recall.
System Operator’s Guide to the System Initialization Command File, Rev. 03