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Int 7F Fn 0A - Alloy Ntnx - Get System Flags [N]
AH = 0Ah
CL = 00h
ES:DI -> buffer for system flags (see below)
Return: ES:DI buffer filled
Notes: on a slave, only the NX_Busy flag is returned
all three flags are at fixed positions, so this function only needs to
be called once
an interrupt handler should only perform DOS or device accesses when
all three flags are 00h
Format of system flags:
Offset Size Description
00h DWORD pointer to NX_Busy flag (nonzero when communicating with users)
04h DWORD pointer to device driver busy flag
08h DWORD pointer to InTimer flag
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