Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 304)

III. COMMAND REFERENCES - 15. Command References 15A. Driver488/DRV Commands
Personal488 User’s Manual, Rev. 3.0 III-289
The ENTER command reads data from the I/O adapter. If a device address (with optional secondary
address) or name is specified, then Driver488 is addressed to Listen, and that device is addressed to
Talk. If no address is specified, then Driver488 must already be configured to receive data, either as a
result of an immediately preceding
ENTER command, or as a result of one of the SEND commands. If
the character count count is specified, then that exact number of characters is read from the device.
Otherwise, ENTER terminates reception on detection of the input terminator, that may be overridden by
specifying the terminator in the ENTER command. The received terminator is then replaced with the
EOL IN terminator before being returned to the user’s program.
ENTER (Peripheral Mode)
SYNTAX ENTER[;][#count][;][term][term][EOI]
count is the number of characters to read.
Term and EOI override the normal bus input terminator.
RESPONSE Device-dependent data. If count is specified, then exactly
count characters are returned without EOL being appended.
Otherwise the response ends when the input terminator is
detected at which time EOL is appended to the returned
data.
MODE *CA
BUS STATES Determined by the Controller
SEE ALSO OUTPUT, TERM, EOL, BUFFERED
EXAMPLES PRINT#1,”ENTER”
INPUT#2,A$ Read data into A$ until the default bus input terminator is
detected
PRINT#1,”ENTER CR”
INPUT#2,A$ Read data until CR is detected
PRINT#1,”ENTER$00”
INPUT#2,A$ Read data until a NULL is detected
PRINT#1,”ENTER LFEOI”
INPUT#2,A$ Read data until LF or EOI is detected
PRINT#1,”ENTER#10”
A$=INPUT$(10,#2) Read 10 bytes. INPUT$ returns 10 bytes from file #2
In Peripheral mode, the ENTER command receives data from the I/O adapter under control of the Active
Controller. The Active Controller must put Driver488 into the Listen state and configure some bus
device to provide Driver488 with data. The Listen state can be checked with the STATUS command,
or can cause an interrupt with the ARM command. A time-out error occurs (if enabled) if Driver488
does not receive a data byte within the time out period after issuing the ENTER command.
ENTER #count BUFFER (Controller Mode)
SYNTAX ENTER[addr][;]#count[;]BUFFER buf-addr [CONTINUE] [term]
[term][EOI]
addr is a device address (primary with optional secondary) or external device
name.
count is the number of characters to read.
CONTINUE specifies asynchronous transmission.
Buf-addr is the memory buffer address.
Term and EOI override the normal bus input terminators.
RESPONSE None, returned data is placed directly into the specified
memory buffer.
MODE CA
BUS STATES ATN
•UNL, MLA, TAG, *ATN, data (With addr)
*ATN, data (Without addr)
SEE ALSO OUTPUT, TERM, EOL, BUFFERED
EXAMPLES See next page.