MPHDR.MAC;3/au/-bf=[13,10]MPHDR.MAC;1 -58,60,/;DLE001/ 10$: CLR R2 ; FORM R2,R3 = VBN IN INDEX FILE MOVB V.IBSZ(R4),R3 ; SIZE OF INDEX BIT MAP < 128. dec r3 ; Correct size for start at zero ; i.e If size of bit map is 1 then the vbn is the vbn not vbn + 1 add v.ibvb(r4),r3 ; Point to index bit map vir block number adc r2 /