ECHO Use the E:HO command to place the terminal in the echo environment. When in the echo environment, any input line entered is transmitted to the terminal a specified number of times. The format
of the ECHO command is:
r ,
ECho Innl i 1 i
L J
1 I I I I L ____________ . , nn is the number of times that the line is to be sent. The is 1. An invalid entry (that is, one that is greater
than 99 or contains nonnumeric characters) is treated as 1. 1 1. When the specified number of lines has been displayed, another read
to the terminal is issued to accept another data line.
2. To terminate the display before completion (for example, when you want to =hange the data line), press the attention key.
3. No line editinq is done; the output line is the same as the input
line and may contain any of the logical line editing symbols. ECHO ENTERED; TO TEFMINATE TEST, TYPE END
is displayed after the ECHO command is invoked to indicate that the
echo environment has been entered.
ENTER LINE
is displayed to prompt for an input line to be entered. A reply of END returns the terminal to the CP command environment.
section 5. Format of CP Commands 83
EXTERNAL Use the EXTERNAL command to simulate an external
virtual machine and return control to that machine. EXTERNAL command is:
interrupt to the
The format of the
r-------- , I EXTernal I 'r , , ,code, , I !!Q , ,L J , L _____ _
code !!Q is the interrupt code, a hexadecimal number to be associated
with the external interrupt. All codes within the range X'01' thLoucrh X'FF' are valid. If your virtual machine has the ECMODE option specified in the VK/370 directory, you can also code X'1004' (clock comparator interrupt) or X'1005' (CPU timer interrupt). The default is the external interrupt
button on the system console, X'40'. simulates pressing the interrupt key on the real computer console, or other functions which cause an external interrupt. Control is given
to the machine immediately.
None. Since control is given to the virtual machine, any response is
from virtual machine processing.
84 CP Command Reference fOL General Users
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