Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 303)

15A. Driver488/DRV Commands III. COMMAND REFERENCES - 15. Command References
III-288 Personal488 User’s Manual, Rev. 3.0
can still check for the conditions by using the STATUS command. If the DISARM command is invoked
without specifying any interrupts, then all interrupts are disabled. The ARM command may be used to
re-enable interrupt detection.
DMA CHANNEL
SYNTAX DMA CHANNEL {channel|NONE}
channel is the DMA channel to be used by the I/O adapter.
RESPONSE None
MODE Any
BUS STATES None
SEE ALSO INT LEVEL, TIME OUT
EXAMPLE PRINT#1,”DMA CHANNEL 5”
The DMA CHANNEL command specifies which DMA channel, if any, is to be used by the I/O interface
card. The PC has four DMA channels, but channel 0 is used for memory refresh and is not available
for peripheral data transfer. Channel 2 is usually used by the floppy-disk controller and is also
unavailable. Channel 3 is used by the hard disk controller in PCs, but is usually not used in AT
compatible machines. So, channel 1 (and possibly channel 3 ) is available for DMA transfers. The AT
compatible computers have three 16-bit DMA channels: 5 , 6 , and 7 . The MP488CT can use these
channels for high speed transfer. The DMA CHANNEL value must match the hardware switch settings on
the I/O adapter card.
ENTER (Controller Mode)
SYNTAX ENTER[addr][;][#count][;][term][term][EOI]
addr is a device address (primary with optional secondary) or external device
name.
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 the exact
count of characters is returned without EOL being
appended. If not, the response ends when the input
terminator is detected and EOL is appended to the returned
data.
MODE CA
BUS STATES ATN
•UNL, MLA,TAG, *ATN, data (With addr)
*ATN, data (Without addr)
SEE ALSO OUTPUT, TERM, EOL, BUFFERED
EXAMPLES PRINT#1,”ENTER16”
INPUT#2,A$ Read data from device 16
PRINT#1,”ENTER16”LINE
INPUT#2,A$ Read an entire line of data from device 16 even if it
contains commas or other punctuations
PRINT#1,”ENTER16;CR”
INPUT#2,A$ Read data from device 16 until CR is detected
PRINT#1,”ENTER16$000”
INPUT#2,A$ Read data until a NULL is detected
PRINT#1,”ENTER16LFEOI”
INPUT#2,A$ Read data until LF or EOI is detected.
PRINT#1,”ENTER0702
INPUT#2,A$ Read data from device 7
PRINT#1,”ENTER12#5”
A$=INPUT$(5,#2) Read 5 bytes from device 12. INPUT$ returns 5 bytes from
file #2
PRINT#1,”ENTER#20”
A$=INPUT$(20,#2) Read 20 more bytes. INPUT$ returns 20 bytes from file #2
PRINT#1,”ENTER DMM”
INPUT#2,VOLTAGE Read data from device DMM
PRINT#1,”ENTER COM1”
INPUT#2,A$ Read data from device COM1