Int 2F Fn DE08 C - Desqview V2.26+ External Dev Interface - Save State [Q]
AX = DE08h
BX = mapping context of task being switched from
(see #0342 at INT 15/AX=1016h)
DX = handle of task being switched from
Notes: invoked prior to task swap, interrupts, etc
driver should pass this call to previous handler after processing it
See Also: AX=DE09h,INT 15/AX=5403h,INT 15/AX=DE27h