[comp.periphs] data format of the microsoft serial mouse

daniel@vmucnam.UUCP (Daniel Lippmann) (10/02/87)

can somebody explain what the data format used by the microsoft serial
mouse ( one used on PC, with 2 clicks ) are ? what speed (1200bds) ?
they seem simple and quite different from those of the summagraphics
serial mouse.
mail to: ...!seismo!mcvax!inria!vmucnam!daniel
thanks

apn@nonvon.UUCP (News Administration @ nonvon crg) (10/09/87)

In article <503@vmucnam.UUCP> daniel@vmucnam.UUCP (Daniel Lippmann) writes:
>
>can somebody explain what the data format used by the microsoft serial
>mouse ( one used on PC, with 2 clicks ) are ? what speed (1200bds) ?
>they seem simple and quite different from those of the summagraphics
>serial mouse.
>mail to: ...!seismo!mcvax!inria!vmucnam!daniel
>thanks


	byte	6	5	4	3	2	1	0
	1	1	s1	s2	y7	y6	x7	x6
	2	0	x5	x4	x3	x2	x1	x0
	3	0	y5	y4	y3	y2	y1	y0

	x0-7:	relative motion along x-axis
	y0-7:	....		      y

	frame: 1 start bit, 7 data bits, no parity bit, 1 stop bit, 1200baud

	displacements of more than +/- 128/127 are handled by multiple
	packets

	Alex P Novickis
	[Designer of Fulcrum Trackball]