IO transactions within a computer system have evolved along with other system components (i.e., CPU, memory, video) from programmed IO (PIO). In current mainstream systems (spanning from HPC to mobile) the IO transactions are CPU-centric descriptor-based DMA transactions. The key benefit is that slower IO devices can DMA write system...
An 8 bit microcontroller slave unit was designed, constructed, and tested to
demonstrate advantages and feasibility of master/slave parallel processing using
conventional processors and relatively slow inter-processor communications. An 8 bit
ISA bus controlled by an 80X86 is interfaced to a logic block that controls data flow to
and from...
Computer system I/O has evolved with processor and memory technologies in terms of reducing latency, increasing bandwidth and other factors. As requirements increase for I/O, such as networking, storage, and video, descriptor-based DMA transactions have become more important in high performance systems to move data between I/O adapters and system...
With the recent advent of commercial laser absorption spectrometers, field studies measuring stable isotope ratios of hydrogen and oxygen in water vapor have proliferated. These pioneering analyses have provided invaluable feedback about best strategies for optimizing instrumental accuracy, yet questions still remain about instrument performance and calibration approaches for multi-year...
With the recent advent of commercial laser absorption spectrometers, field studies
measuring stable isotope ratios of hydrogen and oxygen in water vapor have proliferated.
These pioneering analyses have provided invaluable feedback about best strategies for optimizing instrumental accuracy, yet questions still remain about instrument
performance and calibration approaches for multi-year...
