IBM 3278 User Manual

Accepted Commands
Below is a list of the commands sent from the control unit and
recognized by the IBM Personal Computer 3278/79 Emulation
Adapter Card.
Note: The emulation adapter will respond
to all good
transmissions.
Coaxial
Frame Bits
Commands
56789
READ Poll (include priority)
o 0 0 0 1
Read Data
o 0 0 1 1
Read Address Counter High
00101
Spare
o 0 1 1 1
Read Terminal I D
o 1 0 0 1
Read Multiple
o 1 0 1 1
Read Status
o 1 1 0 1
Spare
o 1 1 1 1
Poll Acknowledge
1
000
1
Spare
1 0 0 1
1
Read Address Counter Low
1 o 1 0 1
Spare
1 o 1 1 1
(Part 1 of 2) Accepted Commands
1-12

IBM 3278 Specifications

General

Brand	IBM
Model	3278
Category	Desktop
Language	English