Andrew Talbot wrote:
[snip]
Interfacing via the parallel port is easy enough in DOS and WIN 3.1 but in
WIN9x it is a bit hit and miss depending on the ports implementation.
16 bits via the serial port beeds really three bytes per sample. It can of
course be sent directly as two 8 bit words, but there is no way of keeping
in sync and knowing which word is high / low etc. By transmitting the 16
bits over 3 words, check bits can be included to positively identify which
word is which out of the frame of three.
[snip]
If someone is seriously considering designing and prototyping an acquisition
board for the PC, please don't forget to give a more than casual thought to
the USB port. It is an high-speed serial interface, and can even provide power
supply to the connected devices.
The old parallel and serial ports are on their way to the retirement...
73
Alberto I2PHD
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