Input message descriptor bytes (SLU P)
Message descriptor 1 (byte 2 of the FM header) has the following format.
- Bit 0
- Reserved
- Bit 1
- Page advance requested (NEXTPP)
- Bit 2
- Message advance requested (NEXTMSG)
- Bit 3
- Message advance protect requested (NEXTMSGP)
- Bit 4
- Next logical page requested (NEXTLP)
- Bit 5
- Reserved
- Bit 6
- Format description indicated by the MID name length, and MID name fields should be used to format this input message
- Bit 7
- Reserved
Bits 1, 2, 3, and 4 (MFS control requests) are mutually exclusive. Bit 6 must be set on if the input message is to be formatted by the MFS MID name provided. When bit 6 indicates a MID name is present, bits 0 through 5 must be zero.
Message descriptor 2 (byte 3
of the FM header) has the following format:
- Bit 0
- Version identifier for MFS DPM. Bit 0 must be set on if bytes 5 and 6 of the FM header contain the version ID.
- Bit 1-7
- Reserved