Vaibhav Patkar wrote:
> Dear Amol
>
> Normally a mother boards gets +5V, -5V, +12V, -12V supply from the SMPS. It
> could happen that these voltages are not fully achieved i.e you may get +10V
> or -9V. Now it depends on the OS to recognize wheather it is Logic high or
> Logic low condition for the interface to work. Normally serial port works
> with +12V and -12V. It is possible that the SMPS is not giving proper -12V.
> Assuming it is -10V though Windows recognizes it as proper com port but
> Linux does not. The problem cannot be with +12V as your CDROM drive, Hard
> disk drives works ok.
>
> Hope this help.
i disagree with u here..... the recognition of logic high or a low is not
dependent on the OS but on the hardware and the type of gates used in the
circuit of the h/w . please correct me if i am wrong here but according to what
i have studied OS plays no role in the recognition of logic high and low of the
input voltages. also the +5 and +12 V u r talking abt is the power supply
voltage and not concerned with the recognition of the logical states of the
device.
correct me if i am wrong
chetu
--
Windows 95 is a 32 bit extension
for a 16 bit OS
originally coded for a 4 bit microprocessor
by a 2 bit company
that cant stand 1 bit of competition.
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