Measurement Computing Micro 488/EX rev.2.1 - Manual (Page 77)

Section 5 Command Descriptions
5.7
Active Controller CA
Peripheral (Not Active Controller) *CA
Active System Controller SC•CA
System Controller, Not Active Controller SC•*CA
Not System Controller, Not Active Controller *SC•*CA
Not System Controller, Active Controller
*SC•CA
5.2.4 Bus States
This section describes the bus command and data transfers using IEEE
bus mnemonics abbreviated as follows:
DIO lines
8 7 6 5 4 3 2 1
ATN Attention
data Data String
DCL Device Clear x 0 0 1 0 1 0 0
GET Group Execute Trigger x 0 0 0 1 0 0 0
GTL Go To Local x 0 0 0 0 0 0 1
IFC Interface Clear
LAG Listen Address Group x 0 1 a d d r n
LLO Local Lock Out x 0 0 1 0 0 0 1
MLA My Listen Address x 0 1 a d d r n
MTA My Talk Address x 1 0 a d d r n
PPC Parallel Poll Configure x 0 0 0 0 1 0 1
PPD Parallel Poll Disable x 1 1 1 0 0 0 0
PPE Parallel Poll Enable x 1 1 0 S P3 P2 P1
PPU Parallel Poll Unconfigure x 0 0 1 0 1 0 1
REN Remote Enable
SDC Selected Device Clear x 0 0 0 0 1 0 0
SPD Serial Poll Disable x 0 0 1 1 0 0 1
SPE Serial Poll Enable x 0 0 1 1 0 0 0
SRQ Service Request
TAG Talker Address Group x 1 0 a d d r n
TCT Take Control x 0 0 0 1 0 0 1
UNL Unlisten x 0 1 1 1 1 1 1
UNT Untalk x 1 0 1 1 1 1 1
(x = "don't care")