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Extended Mode Interface to SYSLIB
Table I–8 contains the function codes that may be used on the EM$MFDSP PROC call.
Table I–8. EM$MFDSP Function Codes
Code Description
0 Initialize MFDSP$ and get the first lead item.
1 Initialize MFDSP$ and get the first main item.
2 Get the next lead item.
3 Get sector 1 of the current lead item.
4 Get the next main item.
5 Get the next sector of the current main item.
6 Get the first DAD table for the current main item.
7 Get the next DAD table.
8 Find an item by its MFD address.
9 Convert an MFD address to the DGET file address.
Table I–9 contains the possible values for the additional parameter field. Function codes
not listed in the table do not require an additional parameter value.
Table I–9. EM$MFDSP Parameter Field Values
Code Description
8 The MFD address of the item to be found
9 The MFD address to be converted
EM$MFDSP returns the status of the call to MFDSP$ in the packet field CALLSTAT.
The CALLSTAT field in S3 of word 2 of the packet (packet address + 1). The possible
status is:
0 Normal return from MFDSP$
1 Error return from MFDSP$ (error code returned in field
A2SAVE)
2 Illegal value given for the MFDSP$ function code
For all calls by EM$MFDSP, the contents of registers A0 through A5 from MFDSP$ are
returned in packet fields A0SAVE, A1SAVE, A2SAVE, A3SAVE, A4SAVE, and A5SAVE,
respectively. These fields are at words 3 through 8 of the packet.
Packet Generation:
The EM$MFDSPPKT PROC generates the packet for the Extended Mode interface to
MFDSP$. This packet is required by the EM$MFDSP PROC.
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