This function Sets the 32bit linear base address field in the descriptor
for the specified segment.
In:
AX = 0007h
BX = selector
CX:DX = 32bit linear base address of segment
Out:
if successful:
carry flag clear
if failed:
carry flag set
Notes:
Under DPMI 1.0/VCPI/XMS/raw, any segment register which contains the selector
specified in register BX will be reloaded. DPMI 0.9 may do this, but it is not
guaranteed. We hope you have enough sense not to try to modify your current CS
or SS descriptor.