Re-2: write to and read from a hardware address directly, possible?

[Stephen Barncard]

I might add that unless one is intimately knowledgeable about the 
hardware or it was self-made, that one should avoid touching anything 
in the memory map directly, 'behind the back' of your OS, so to 
speak., unless the makers of the I/O card have made a certain memory 
space available.

These addresses, still, are not 'fixed' but must be calculated 
carefully. Computers these days don't like us poking around without 
'management'. Major damage could result.

This is probably why there is no PEEK and especially POKE commands 
are available in REV! We'd all blow up our computers.

I'd add another plug for using serial based data acquisition:

expand ability
isolation from host
long wire lengths
use any software, even a dumb terminal, to test in early stages.

if one uses good wire, one can get pretty high speeds. There are even 
ways to send 'serial' data over a Ethernet network to a remote box 
which has several serial ports.

If I've underestimated your knowledge or your applications, I apologize.



sqb

-- 


stephen barncard
s a n  f r a n c i s c o
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