Talking with monitors microprocessor (Acer)

[Heinz Schmitz]

Acer 7276e is controlled by a 87C52 microprocessor. Actually, the
TxD and RxD lines are accessible on the VGA-connector, where an
additional line is found, too, to supply microprocessor and serial
Eprom with 5V - obviously, the communication seems to be done
while the monitor is switched off.

Does anybody know the protocol and commands to read/write data
into the chip, to get_at/adjust the factory/start settings? I'll
probably be able to find out eventually, but an expert would kindly
save me a lot of time and effort.
The supplier of this monitor pretends to know nothing .
Other (younger) Acers have a processor chip labelled with a seemingly
proprietory code (like 177....). Any idea, what microprocessor is
hidden behind this label?
Thanks in advance,
H.

 

[Jerry G.]

All the makes use their own proprietary command set. This is addressed from
your system by the driver that they install. When the operating system
controls the monitor options and operation modes through the driver, this is
called the "smart mode". If you put the generic driver for your monitor,
the monitor works in a sort of dumb mode. It will sense only the sync pulse
rates for line and field, to know the mode to go in.

What you are asking is kept confidential under contracted agreements, like
MS would never give out any source codes for their programs, or operating
systems. It is true that at the service level, the employees and service
people would not know what you are enquiring about.

Most of the CRT type monitors out there are not truly smart monitors. This
is seen more in the very high end monitors, and in the LCD types.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


"Heinz Schmitz" <HeinzSchmitz@gmx.net> wrote in message
news:mbhotv07mi91l5lm675pc4pfq6h3co5eg8@4ax.com...
Acer 7276e is controlled by a 87C52 microprocessor. Actually, the
TxD and RxD lines are accessible on the VGA-connector, where an
additional line is found, too, to supply microprocessor and serial
Eprom with 5V - obviously, the communication seems to be done
while the monitor is switched off.

Does anybody know the protocol and commands to read/write data
into the chip, to get_at/adjust the factory/start settings? I'll
probably be able to find out eventually, but an expert would kindly
save me a lot of time and effort.
The supplier of this monitor pretends to know nothing .
Other (younger) Acers have a processor chip labelled with a seemingly
proprietory code (like 177....). Any idea, what microprocessor is
hidden behind this label?
Thanks in advance,
H.

 

[Heinz Schmitz]

On Sun, 14 Dec 2003 09:33:51 -0500, "Jerry G." <jerryg50@hotmail.com>
wrote:

Thanks for your kind answer.

[ .. ]

What you are asking is kept confidential under contracted agreements, like
MS would never give out any source codes for their programs, or operating
systems.

I don't think that this is a valid comparison. Knowing the commands to
do or redo the factory setting wouldn't put me in a position to build
monitors and to endanger their business.
Thus, keeping this knowhow confidential, should, infact, be sueable
with regard to antitrust laws . Why do they sell me a monitor at
all, instead of keeping the device secretly at home?

It is true that at the service level, the employees and service
people would not know what you are enquiring about.

I did ask people at service management level. I didn't even ask a
favour, but offered to pay. Does leave a bas taste, indeed.
H.