From: nowhere@never.at   
      
   I forgot to add:   
      
   you seem to work in text-mode (because of the 0xb8000),   
   but mice are made to work on hires graphic (up to 1200ticks/inch)   
   so you will need to scale all values down (with SHR).   
      
   >> Any ideas?   
      
   > Robert already said it, the mouse reports only delta motion since previous.   
   >   
   > you enabled IRQ12, but did you update IDT/VDT to point to your handler ?   
   >   
   > what I see yet as your 'handler' isn't an IRQ-routine, you poll it ?   
   >   
   > I'd add a synch check to it: if bit3 on a first byte read is not 1 then   
   > discard the input and reset the byte counter.   
   >   
   > packed data for X and Y movements in Wheelmouse mode are signed 9 bit   
   > values, so your MOVSX on the 8-bit wont work as desired.   
   >   
   > first byte bits 7/6 are y/x overflow, bits 5/4 are y/x (9th)sign bits.   
   >   
   > the Z-value is a signed 8 bit value even limited to +7/-8.   
   > __   
   > wolfgang   
      
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