ADTSECT
Hexadecimal Field
DisplacementName Field Description, Contents, eeaning 6C ADTIAREC DS 1F Address of tlock of extra chain link records
ADTLBM
ADTLDMEQU EQU ADT2ND-ADTSECT Length of minimum ADT block (in bytes)
ADTLBM/8 Length of minimum ADT blcck in dcublevords
ADTLB
ADTLDEQU EQU *-ADTSECT
(ADTLB+7)/8Q!her Parameters
ADTRL---EQU---aoo ADTMIBML EQU 10 Length of full ADT block (in bytes)
Length of full ADT block in dcublevords
Lcgieal reccrd lengthMaximum bit map length (number ef records)
for3330 Table DTAD EQU --0-- Device number
DTADTEQU 3 Device type byte
DTASEQU 4 5ymbelic device name 142 IBM VMj370 Data Areas and Central Block Logic
Hexadecimal Field
Displacement
ADTLBM
ADTLDM
ADTLBM/8 Length of minimum ADT blcck in dcublevords
ADTLB
ADTLD
(ADTLB+7)/8
ADTRL
Length of full ADT block in dcublevords
Lcgieal reccrd length
for
DTADT
DTAS