AX=0006h [2.08] Open file
Input: AX 0006h
ES:SI null-terminated filename
Output: SI file handle
EAX length of file in bytes, or -1
CX file block size
My patch only cares about the output registers (EAX, CX and SI) and only ES and SI
are used inside pm_open_file(). So there is no need to pass (correct) EAX and CX
register values to pm_open_file() nor restore ES; P_ES should still contain the correct
input value on exit.
Sebastian