tEVSECT tEVSECT describes the device information required for input/output routines. DEVSECT is
a DSECT corresponding to the data in a DEVTAE entry.
o
8
Hexadecimal
Displacement
------------ 0 2
3
4
8
C DEVADDR 1 D* 1 1 D*2 DEVNAHE I --------------------------------------------------------1
Field Name DEVADDR DEVFLAG DEVTYPE DEVNAHE DEVIPRA DEVMISC DEVSIZE DEVIPRA DS
DS
DS
DS
DS
DS EQU 1H 1X 1X 1F
1F
1F *-DEVSECT 1 Field Description, Contents, eeaning Virtual device address
D*1 Device flags
D*2 Device type Symtolic device name
Interrupt processing routine address
Miscellaneous --device dependent
Device table size (in bytes)
156 IEM VM/370 Data Areas and Control Block Logic

DEVTAE DEVTAB contains the entries for the various devices handled by (disks, tapes, reader,
punch, printer, and censole). DEVTAB is pointed to ty v-constants in tMSICW and DMSITI, and is also referenced indirectly by the ADEVTAE field in NUCON. -, ,
a CONSOLE I BO READEB1 I I 10 ADISK I co PUNCH1 I I 20 BDISK I DO PRINTEB1 I I 30 CDISK yon READEB2 l:;V 40 DDISK FO PUNCH2 50 EDISK 100 PRINTER2 60 FDISK 110 TAPE1 70 GDISK 12C TAPE2 80 SDISK 13C TAPE3 90 YDISK 14C TAPE4 AO ZDISK 150 ----' Hexadecimal Field
Displacement Name Field Description, Contents, Meaning ------------
a CONSOLE DS OD Device tatle entry for console 0 DC XL2'009' 2 DC XL2'0' 4 DC CL4'CON1' 8 DC VL4 (CONSI) C DC XL4'0' 10 ADISK DS aD Device tatle entry for A-disk 10 DC XL2'191' 12 DC XL2'O' 14 DC CL4'DSK1' 18 DC AL4 (0) 1C DC XL4'O' 20 BDISK DS aD Device tatle entry for B-disk 20 DC XL2'000' 22 DC XL2'O' 24 DC CL4'DSK2'
28 DC AL4 (0) 2C DC XL4'0' 30 CDISK DS aD Device tatle entry for C-disk 30 DC XL2'OOO' 32 DC XL2'O' Sectien L. Data Areas and Centrol Blocks 157