E-8
Configuring the Spider8 with the setup programÝ Setup program
Spider8
Byte mode:
Transfer from the Spider8 to the PC takes place via data lines,
which are switched from the normal direction (output) to input
(two-way operation) in order to do this. Most modern computers
allow this type of programming.
Data transfer rate: 48 000 bytes/s (24 000 samples/s)
EPP mode:
If the interface is working in EPP mode, the data is transferred
bi-directionally, as in byte mode. Handshaking is also handled
directly and therefore very quickly, whereas with all other operating
modes, the processor deals with handshaking using the program. It
is important here whether several Spider8s are cascaded and how
many channels are activated.
Data transfer rate: > 152 000 bytes/s (76 000 samples/s)
All throughputs mentioned are values determined in experiments
using large data quantities on a 486 PC with a clock-speed of
33MHz. More up-to-date computers with faster clock speeds can
achieve considerably greater data throughput, especially in Nibble
and Bit8 operating modes.
Often the BIOS setup (accessible by pressing a key during boot-up)
or a manufacturer-specific setup program will offer you the option of
configuring the parallel ports.
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