Relationship between calls, AIBs, and PCBs

The following table shows the relationship of calls to full function (FF), main storage database (MSDB), data entry database (DEDB), I/O, and general sequential access method (GSAM) PCBs.

Table 1. Call relationship to PCBs
CALL AIB FF PCBs MSDB PCBs DEDB PCBs I/O PCBs GSAM PCBs
APSB X          
CHKP X       X  
CIMS X          
CLSE X         X
DEQ X     X X  
DLET X X X X    
DPSB X          
FLD X   X X    
GHN X X X X    
GHNP X X X X    
GHU X X X X    
GMSG X          
GN X X X X X X
GNP X X X X    
GSCD1 X X X X X  
GU X X X X X X
ICMD X          
INIT X       X  
INQY X          
ISRT X X X X X X
LOG X       X  
OPEN X         X
PCB2            
POS X     X    
RCMD X          
REPL X X X X    
ROLB X       X  
ROLL2            
ROLS X X     X  
SETS/SETU X       X  
SNAP3 X X X X X  
STAT4 X X        
SYNC X       X  
TERM2            
XRST X       X  
Note:
  1. GSCD is a Product-sensitive Programming Interface.
  2. The PCB, ROLL, and TERM calls do not have an associated PCB.
  3. SNAP is a Product-sensitive Programming Interface.
  4. STAT is a Product-sensitive Programming Interface.