The SML Monitor Control Area is used to define various constants, save areas, BSC centrel
sequences, channel command words, and bit settings used during SMt processing.
Field CEUFFER CFCSOUT CFCSSTD FCSCTEMP CTEMP CMAXDUP CECBCNTO CECBCNTI CBUFLAST CRESP CREGS CRETREGS $COMEXIT CECB CSETBCB CCSW COLDRCB CUNITCMD CLASTCAW BUFSYNSW $TPPNONE OFLSW GDQBUFS $COMBUSY CUWFAKE CACKSW AtAECB ADACUU AtCCWA AtASIOCC AtACSW ADASENSE AtSAV XSTXSEQ XETBSEQ XACKSEQ XNAKSEQ XSYNSEQ DC A (0) DC X'SFCF' DC X' SSC l' DC AL2 (0) DC H'O' DC H'3'
DC AL 1 (0) DC lL1 (X'SO') DC AL 1 (0) DC AL1 (X'SO') DC H'O' DC 10X'00' DC AL 1 (0) DS 3F DS 3F
DC A ($START) DC X'OO' DC X'OO' DS OF DC XLS'OO' DC X'OO' DC X'OO' DC F'O' DC X'OO' l!!ts defined !1! EQU X'SO'-- EQU X'40' EQU X'20' EQU X'10' EQU X'OS' EQU X'04' Active communications buffer
Last FCS transmitted tc HASP Standard FCS FCS compare area
temporary storage Maximum repeated hlocks
First byte of halfword
Elock check count out Spacer Elock count character expected Save of start of last buffer
Response character received
Register save area Save area COMSUD initial entry peint
Last BCE sent for reset
Force fullword alignment temporary storage for csw
Last RCE sent Command code storage CCW address save
Euffer synchronization switch Stop all buffering
Flush huffer Stop dequeuing buffers
Communications inactive tummy read on for unit exception recovery ACK received
DC F'O' Synchronous lock
DC X'OOOO',AL1(1),AL1(TYP2700) DC A (CCTCCW) Adapter CCW addr EQU * SIO condition code
DC 2F'0' Adapter ending CSW DC F"O' Adapter sense hyte DC SF'O' $SIO register save area Cont!21 DC AL1(XLDR,XSTX) DC lL1(XTRL,XETE) DC lL1(XDLE,XACKO) DC AL1 (XSYN,XNIK) DC lL1(XSYN,XSYN,XSYN,XSYN) Start-of-text sequence
End-of-text-block sequence positive acknowlegement sequence
Negative acknowlegement sequence
Synchronization sequence 28S IBM VM/370 Data Areas and Centrol Block Logic

Field CCiS CCiA CCiB CCiC CCiD CCWOFF WRITE READ NOP SENSE SENSE DISABLE !2!Q§ Normal Data Write with Return CCW--l,ISYNSEQ:cD+SILI,4----- CCi 1,O,CC+SILI,O CCW 1,XETBSEQ,CC+SIL1,2 CCW 2,0,S1L1,0 CCW 2,0,S1L1.SK1P,65000 EQU EQU EQU EQU EQU EQU x; 0 X'02' X' 03' X' 04' X' 04' X'2F' Data Read ---synchronization sequence write buffer Write ending sequence
Read return data
Iisable Adapter write command cede Adapter read command cede
Adapter NOP command code Adapter sense command code
Adapter sense command cede
Adapter disable command cede
Appendix B. RSCS Contrcl Areas 289