Messages in this thread | | | Date | Sun, 30 May 2004 12:53:30 +0100 | From | Russell King <> | Subject | Re: keyboard problem with 2.6.6 |
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On Sun, May 30, 2004 at 01:40:03PM +0200, Sau Dan Lee wrote: > Now, what prevents people from connecting terminals to a computer via > the PS/2 mouse port?
Apart from electrically blowing the PS/2 port, the data format of PS/2 is well defined and fixed, whereas a UART (8250-based) port is more flexible. PS/2 also has the idea of acknowledgement from the peripheral device for each byte transferred, and is synchronous, whereas UARTs have no acknowledgement and are asyncrhonous.
So, any thought that the two ports are similar compatible with each other, either from the electrical or protocol points of view is just a dead loss.
How do these mice work on both ports then? They can detect which port they're connected to and the electronics inside automatically configures itself depending on which port they're connected to.
> Your approach in the input system completely rules out this > possibility.
As from above, its more than just the input system - its the protocol and electrical characteristics which completely rules out the possibility - which in turn makes it nonsensible to support such an idea in software.
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/ 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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