VDP routine HMMM is not correct

[EMLommers]

Missing some data and when added data, does not work in some cases.

Invalid is : SUB A
should be SUB A,x (D / E)

when copying 0,0 - 240,10 to 10,0... fails (in OpenMSX, not checked yet on real MSX)
you need to reverse 240,0 - 0,10 to 10,0 works (very slow, if DIX and DIY is set correctly)

Also size of NX and NY result is incorrect.

Routine should be rewritten. (by ASCII)