I was trying to use a very large screen in ISPF, but I could only get 132 * 43.
You can display information about your screen using
- ISPF option 0 Settings
- top line, tab to environ
- option 1 Environ settings…
- tab down to Terminal Status (TERMSTAT)
- option 2 Query terminal information
If gives information like
ISPF TERMINAL CHARACTERISTICS
14 BIT ADDRESSING = ON
16 BIT ADDRESSING = OFF
EXTENDED COLOR = ON
EXTENDED HIGHLITING = ON
DBCS = OFF
PRIMARY SCREEN SIZE - PARTITIONED MODE
SCREEN SIZE = 1,920 - x'00000780'
SCREEN DEPTH = 24 - x'00000018'
SCREEN WIDTH = 80 - x'00000050'
ALTERNATE SCREEN SIZE - PARTITIONED MODE
SCREEN SIZE = 3,564 - x'00000DEC'
SCREEN DEPTH = 27 - x'0000001B'
SCREEN WIDTH = 132 - x'00000084'
PARTITION SCREEN SIZE - PARTITIONED MODE
SCREEN SIZE = 0 - x'00000000'
SCREEN DEPTH = 0 - x'00000000'
SCREEN WIDTH = 0 - x'00000000'
PRIMARY SCREEN SIZE - NON-PARTITIONED MODE
SCREEN SIZE = 1,920 - x'00000780'
SCREEN DEPTH = 24 - x'00000018'
SCREEN WIDTH = 80 - x'00000050'
ALTERNATE SCREEN SIZE - NON-PARTITIONED MODE
SCREEN SIZE = 3,564 - x'00000DEC'
SCREEN DEPTH = 27 - x'0000001B'
SCREEN WIDTH = 132 - x'00000084'
ISPF TERMINAL BUFFER INFORMATION
TERMINAL BUFFER ADDR = x'000326A8'
TERMINAL BUFFER SIZE = 4,989 - x'0000137D'
PHYSICAL SCREEN SIZE = 3,564 - x'00000DEC'
PARTITION ARRAY ADDR = x'0001DAA0'
GTTERM INFORMATION
RETURN CODE = x'00000000'
PRIMARY ROW = 24 - x'00000018'
PRIMARY COL = 80 - x'00000050'
ALTERNATE ROW = 27 - x'0000001B'
ALTERNATE COL = 132 - x'00000084'
ATTRIBUTE BYTE = x'000000C9'
EBCDIC TERMINAL
EDS TERMINAL
GTSIZE INFORMATION
RETURN CODE = x'00000000'
ROWS = 27 - x'0000001B'
COLUMNS = 132 - x'00000084'
VTAM ACCESS METHOD
All the information says the screen is 27 rows and 132 columns.