[Ma-linux] perplexing hardware problem

[Johnson, Steve (NIH/OD/ORS) [E]]

There is a UNIX lesson with ASCII 0x07 to standard out because it shows
that by the time of C language the speaker on the PC mother board was a
simulator of earlier hardware, the dedicated terminal.  The modern
computer maker is a subset of what was formerly known as the instrument
maker, which kind of manufactery is much bigger in other parts of the
country.  ASCII 0x07 is decidedly a usable feature because it can beep
at invalid typed input or any writes to standard out 2 (output stream
for error - when a program ran no need to look at logs, if there was no
beep the program ran without writing to standard error).  The program
need be no more than the following pseudocode
#include <stdlib.h>
int main() { if (ERROR) {<< 0x07;} }
When X acts as display and input terminal new constraints are involved.
It might be humorous to consider but with sufficiently stringent
requirements for security, a real hand tightened lock down, writes to
the terminal may be constrained, only writes to the files system
allowed.  If somebody ever figures out how to get smoke signals out of
spiking CPU temp or system board beeps you'll be grinning wide trying to
explain why you have more leaks than a molehill.
 
 
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