I'm programming for an application that writes 2.5 millions
of 9 bit signals on a port (like parallel). The process takes to me about 4.5 seconds and it's too much. I have an ISA card called DAS-1202 (Keithley-Metrabyte).
I would like to make it faster (1 second).
To write on the ports I use c++ _outp.
Keithly-Metrabyte sells them. The main I/O chip is an Intel 8255 multipurpose I/O. It has three banks of eight lines that can be set as inputs or outputs in groups of four. Thus you can have 24/20/16/12/8/4/0
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