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Thread ID: 9774 2001-06-14 22:00:00 ps/2 vrs serial Guest (0) Press F1
Post ID Timestamp Content User
14157 2001-06-14 22:00:00 Can someone please explain the difference between ps/2 and serial apart from the physical plug differences. Guest (0)
14158 2001-06-14 22:32:00 I'm not entirely sure what it is that you want to know, but if you're wanting to connect a mouse, they both do essentially the same thing.

There are really two things that I would make a point of:
- Some PS/2 mice come with a convertor which allows you to connect the mouse to a serial port. However, these convertors often don't work on mice other than the one for which they were intended.
- You won't be able to get your hands on a serial optical mouse; they are all PS/2 and USB only. I believe this is because they require a power supply and a serial port is not able to provide this.
Guest (0)
14159 2001-06-15 00:11:00 Er, not too sure that there is much difference from say the 'mouse' point of view.

But don't motherboards use different controllers for PS/2 ports and serial comms ports? That's my understanding anyway. I was also under the impression that a PS/2 connection polled faster than a serial one, so that you would get smoother mouse response and action. Also, if you use a PS/2 mouse connection, then you free up a comms port address for you to use for a modem etc.

Someone shoot me down in flames if I'm wrong on any of this please :)
Guest (0)
14160 2001-06-15 03:13:00 You're correct on the polling issue, this is why you wouldn't want to play first person shooter games with a serial mouse. Guest (0)
14161 2001-06-15 06:07:00 Yes, there is a seperate connector on the motherboard to which the PS/2 port connects. The serial port is usually on the main I/O card (which is another connector on the motherboard), although if you need more serial ports then you can put add-in cards on the PCI bus.

Many computers which do not have PS/2 ports actually do still have motherboards with a PS/2 connector on them. This means that a PS/2 port can be easily added for about $10. If, however, you want to get a PCI card with a PS/2 port on it, then that could be a bit more tricky.
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