AAPH332@UA.BITNET (03/25/86)
I am seriously considering, among other possibilities,
purchasing a 1040st for use as a laboratory data collection/
analysis device. Before I can make up my mind, however, I need
to get answers for a few questions.
1. Suppose I want to "read" several (five) 12 or 16 bit
digital devices "simultaneously"; i.e. I want to move data
from some external digital devices to (possibly sequential)
RAM as quickly as possible. The devices should (or will) all
be set prior to the read.
2. Suppose I want to output different data to several different
digital devices "simultaneously"; i.e. I want to move data from
preveously loaded RAM to external digital devices.
3. Suppose I want to read two digital devices, compare the data,
and output another digital signal to a third device that depends
on the result of the comparison. I want to do this FAST too.
I am willing to put together some hardware to do this. I think I can
also manage the software, provided that this can be done at all.
What I need to know is where do I "plug in" to get the fastest
data flow rate. I guess I should say that I only want to do this once
every second or so. Can I "wire" the devices as high order otherwise
unused memory locations and then just move the data?
Any help, etc. etc. etc. Thnak you.
D. DeSmet
AAPH332@UA.BITNET
Thought for the day: I feel more like I do now than I did when I
started writing this.
************************************************************************bammi@CASE.CSNET ("Jwahar R. Bammi") (03/26/86)
I feel that it would be most appropriate to use the printer port on the ST. All lot of poeple don't realize that it is a bidirectional i/o port rather than just a parallel output port. Your application seems ideal for this. Using the Dma port ofcourse will be a lot more complicated software wise, and also i suspect hardware wise. Hope this helps. Jwahar R. Bammi Usenet: .....!decvax!cwruecmp!bammi CSnet: bammi@case Arpa: bammi%case@csnet-relay CompuServe: 71515,155