3270s --Terminal Adapter Type Bl ('7802) permits the attachment of up to 4
additional devices (types 3277, 3284, 3286, 3287 and 3288). Only 1
adapter is permitted.
--Each of the Terminal Adapter Types B2, B3, and B4 ('7803, '7804, and #7805) permits the attachment of 4 additional devices per
adapter (types 3277, 3284, 3286, 3287, and 3288). Only 1 of each
type terminal adapter is permitted. Terminal Adapter Type Bl is a
prerequisite to Type B2, Type B2 is a prerequisite to Type B3, and
Type B3 is a prerequisite to Type B4. Terminal Adapter Types Al, and B3 are mutually --A 3274/3276 Attachment (#8331) is required for each 3287 that
attaches to the basic 3274 Control Unit, or that attaches to
Terminal Adapter Types Al, A2, or A3. A 3271/3272 Attachment (#8330) is required for each 3287 that attaches to Terminal Adapter
Types Bi, B2, B3, or B4.
And only required if a Type B adapter is used:
--Control storage Expansion feature (#1801) provides the ability to
access control unit storage addresses above 64K.
--Extended Function storage feature (#3622) provides additional
storage required to support particular attachments or
configurations. Control storage Expansion feature ('1801) is a
prerequisite.
TERMINALS
The IBM 3277 Display Station Model 2 requires one of the following
features:
--66 Key EBCDIC Typewriter Keyboard (#4630) --66 Key EBCDIC Data Entry Keyboard (#4631)
--78 Key Operator Console-Keyboard (#4632)
--78 Key EBCDIC Typewriter Keyboard (14633) The following features, while not required, enhance the convenience,
security and usability of this terminal:
--Keyboard Numeric Lock (#4690) --Audible Alarm (#1090) --Operator Identification Card Reader (#4600) --Lowercase Character Display (RPQ 18K0366) --Security Keylock (#6340) Note: Unless a 3270 terminal is dedicated supported only as a virtual 3215; that is,
as a real local or remote 3270. to a virtual machine, it is
it is not supported by VK/370 The 3278 Display Station requires one of the following features:
--75 Key EBCDIC Typewriter Keyboard (#4621)
--75 EBCDIC Data Entry Keyboard (#4622) A prerequisite is the EBCDIC Character Set feature (#9082) on the
3218. Part 1. Planning for System Generation 61

3270s The following features, while not required, enhance the convenience,
security, and usability of this terminal:
--Keyboard Numeric Lock (14690) --Audible Alarm (#1090) --Magnetic Slot Reader (#5005) with Magnetic Reader Control (#4999)
--Security Keylock (16340) Lowercase Character Set is standard on this terminal.
(The Test Request Function on locally-attached 3277s is supported by the TEST REQUEST key; it is supported on locally-attached 3278s by the SYSTEM REQUEST key.) PRINTERS The following printers are supported: • IBM 3284 Printer, Model 2. • IBM 3286 Printer, Model 2. • IBM 3288 Printer, Model 2. • IBM 3287 printer, Models 1 and 2. • IBM 3289 Printer, Models 1 and 2. System Generation Requirements for Locally Supported Display Systems System generation requirements for locally-supported terminals and
control units are no different than are the requirements for
DASD-supported or unit record devices. The channel, control unit, and
devices are handled by their respective RCHANNEL, RCTLUNIT, and RDEVICE macros. See "Part 2. Defining Your VM/370 System" for further details.
62 IBM VM/370 Planning and System Generation Guide