Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 45)

I. HARDWARE GUIDES 6. Personal488/CARD
Personal488 User’s Manual, Rev. 3.0 I-29
an error signal occurs. This field is the default timeout for any bus request or action, measured in
milliseconds. If no timeout is desired, the value may be set to zero.
•
Device Type: This field specifies the type of board or module, in this case a Personal488/CARD
(CARD488), represented by the IEEE device name selected.
I/O Address
•
IEEE 488: This field is the I/O base address which sets the addresses used by the computer to
communicate with the IEEE interface hardware on the board. The address is specified in
hexadecimal and can be 100 through 3F0 on even 16-byte boundaries (those ending in 0). The
Personal488/CARD uses sixteen (16) consecutive I/O ports.
Note: Since many I/O ports in the allowed range are [or may be] in use by other system hardware,
we recommend using port 300 to 360 hex. Using a port already in use could cause loss of
data, or physical damage.
•
Wait State: Wait States can be generated if IEEE 488 bus I/O synchronization between the
Personal488/CARD and PC is an issue. It should be noted that the time out specification is
independent of wait state(s). The Personal488/CARD is fast enough to be compatible with
virtually every PC/XT/AT-compatible computer on the market. Even if the computer is very fast,
the processor is normally slowed to 8 MHz or below when accessing the I/O channel. If the I/O
channel runs faster than 8 MHz, it may be faster than the Personal488/CARD. If this is a
suspected problem, the computer can be made to wait for the “CARD” by enabling wait states.
Increasing the number of wait states slows down the access to the “CARD”. The overall resultant
performance degradation is usually only a few percent.
•
Bus Terminators: The IEEE 488 bus terminators specify the characters and/or end-or-identify
(
EOI ) signal that are to be appended to data that is sent to the external device, or mark the end of
data that is received from the external device.
In conclusion, to save your changes to disk press . All changes will be saved in the directory
where you installed Driver488. If at any time you wish to alter your Driver488 configuration, simply
rerun
CONFIG . The changes made will not take effect until the system is rebooted (Warm or Cold).
Driver488/W31 Configuration Utility
The configuration utility provided with Driver488/W31 has been updated to provide a familiar
Windows user interface. The interface contains the same characteristics as the DOS configuration
program, however, the file storage differs as indicated by the table below.
Driver File Storage
Driver Version File Name File Location
Windows DRVR488W.INI WIN.COM (in Windows Directory)
DOS DRVR488.INI CONFIG.EXE (in assigned directory)
Functionality
The Personal488/CARD transfers data to the host computer via the PCMCIA interface. This interface
provides access to the PC’s data bus, allowing real-time data collection and storage to disk at 1.0 M
byte/sec.
The Personal488/CARD built-in 7210 controller device controls the IEEE 488 bus using the IOT7210
Controller Chip, which is 100% compatible with the NEC µPD7210. However, the IOT7210 exhibits
better performance and lower power consumption.
The programmed I/O mode allows the host computer to acquire individual data samples or large blocks
of data under application control.