On Mon, 18 Sep 2000, Hársfalvi Levente wrote: > The problem is: the data is clocked by the _mouse_ and not the host > machine :-(. As I read the docs, the mouse communicates the same way as > the PS/2 keyboard does, and other docs say the keyboard data stream is > clocked by the keyboard itselves. That makes sense. I once read that the original IBM PC AT keyboard controller had two ports and the keyboard only used one of them, so when IBM produced the PS/2 with a proper mouse interface they simply designed a mouse protocol similar to the keyboard protocol using the "spare" port already on their keyboard controller. Sorry. I should have thought a bit more. I'm more than excited about the prospect of a CBM serial mouse interface. Especially as the joystick port has a +5V power connection so you can power the mouse properly rather than relying on the line drivers of two RS232 signals. The decision to use a MAX232 is the right one IMHO, as that chip is becoming more and more widespread and Maxim are (at last) being reasonable about pricing. Are the docs on Funet yet? I'd quite like to build an interface for my old 3 button serial mouse. It will be interesting to decide what to do with the third button... Richard -- Richard Atkinson Software Engineer Tenison Technology EDA Ltd http://www.tenisontech.com/ - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail email@example.com.
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