If you do not already have a mouse rom enabled on your BBC, follows these instructions
Download the mouse driver from – https://mdfs.net/Software/CommandSrc/Mouse.zip – these files will need to be transferred to your BBC
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Load the Mouse ROM into a spare ROM slot number, depending on your configuration, use a free slot number on your computer
*SRLOAD "MouseRom" 8000 -
Initialise the ROM by pressing:
CTRL + BREAK
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Once the ROM has been initialised, enable the mouse by entering:
*MOUSE ON -
Finally, you can run the mouse test program using the command below
CH. "MouseTest"