RT990H.exe notes:


- runs under DOS/WIN9x.  It does not run under W2K/NT/ME etc.
- it is mouse operated only.  You may need to install the mouse.com if running directly from DOS 

DB25 connection:

pin.1   	STEPER/SPI
pin.2   	X-step
pin.3   	X-dir
pin.4   	X-step
pin.5   	X-dir
pin.6   	X-step
pin.7   	X-dir
pin.8   	X-step
pin.9   	X-dir
pin.10  	Dout/ERR
pin.19-25	GND

do not forget to put 100 ohms resistor in series between pin.10 and Dout/ERR line of R99*H driver.


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