System Control Blocks

UCB + 16 (10)
Offset
16 (10) 1
Byte 1
GRAPHICS DEVICE CLASS
2260 Display Station
UCBTYP
Byte 2 Byte 3 Byte 4
lOS Flogs I Model Code I Optional Features I Device Closs I Unit Type
11 (11) • 1
Bytes and
Alignment
11 ( 11 ) ( Cant)
18 (12) . . 1
19 (13) • • . 1
Byte 1
Byte 2
17 (11)
18 (12) 19 (13)
Hex.
Dig. Field Description, Contents, Meaning
J- Device class.
1- 1053, 2260
3- 2250
-K Model code
-1 Modell.
-2 Model 2.
0-
1-
2-
3-
4-
5-
6-
1-
8-
9-
A-
B-
C­
D­
E-
F-
-B
-C
-D
-E
Byte 3 10
Optional features
Device class
Graphics.
Byte 4 03 Unit type
2260 Display Station.
314 OS System Control Blocks (Release 21.7)
Optional Features
No optional features.
Line addressing only.
Numeric keyboard only.
Line addressing and numeric keyboard.
Alphameric keyboard only.
Line addressing and alphameric keyboard.
Non-destructive cursor only.
Line addressing and non-destructive cursor.
Numeric keyboard, and non-destructive cursor.
Optional Features
Line addressing, numeric keyboard and
non-destructive cursor.
Alphameric keyboard and non-destructive
Cursor.
Line addressing, alphameric keyboard and
non-destructive cursor.
Data entry keyboard only.
Data entry keyboard and line addressing.
Data entry keyboard and non-destructive
cursor.
Data entry keyboaz"d, line addressing, and
non-destructive Cursor.
2848 Display Control, Model 1 with 240
character display capability.
2848 Display Control, Model 2 with 480
character display capability.
2848 Display Control, Model 3 with 960
character display capability.
2848 Display Control, Model 21 with 240
character display capability.
2848 Display Control, Model 22 with 480
character display capability.