Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 204)

II. SOFTWARE GUIDES - 9. Driver488/SUB 9K. Command Descriptions
Personal488 User’s Manual, Rev. 3.0 II-189
If a command is preceded by an asterisk ( * ), that command is unasserted. For example, *REN states
that the remote enable line is unasserted. Conversely, REN without the asterisk states that the line
becomes asserted.
For a further description of these bus states and their bus lines, turn to the topic “Bus States” found in
the Sub-Chapter “Command Descriptions” of Chapter 8, and to “Section V: Appendix” in this manual.
Bus State Bus Lines Data Transfer (DIO) Lines
8 7 6 5 4 3 2 1
Hex Value (QuickBASIC) &H80 &H40 &H20 &H10 &H08 &H04 &H02 &H01
Decimal Value 128 64 32 16 8 4 2 1
Bus Management Lines
IFC Interface Clear
REN Remote Enable
IEEE 488 Interface: Bus Management Lines
ATN Attention (&H04) 0 0 0 0 0 1 0 0
EOI End-Or-Identify (&H80) 1 0 0 0 0 0 0 0
SRQ Service Request (&H40) 0 1 0 0 0 0 0 0
IEEE 488 Interface: Handshake Lines
DAV Data Valid (&H08) 0 0 0 0 1 0 0 0
NDAC Not Data Accepted (&H10) 0 0 0 1 0 0 0 0
NRFD Not Ready For Data (&H20) 0 0 1 0 0 0 0 0
Serial Interface: Bus Management Lines
DTR Data Terminal Ready (&H02) 0 0 0 0 0 0 1 0
RI Ring Indicator (&H10) 0 0 0 1 0 0 0 0
RTS Request To Send (&H01) 0 0 0 0 0 0 0 1
Serial Interface: Handshake Lines
CTS Clear To Send (&H04) 0 0 0 0 0 1 0 0
DCD Data Carrier Detect (&H08) 0 0 0 0 1 0 0 0
DSR Data Set Ready (&H20) 0 0 1 0 0 0 0 0
Bus State Bus Commands Data Transfer (DIO) Lines
(IEEE 488) (ATN is asserted “1”) 8 7 6 5 4 3 2 1
Hex Value (QuickBASIC) &H80 &H40 &H20 &H10 &H08 &H04 &H02 &H01
Decimal Value 128 64 32 16 8 4 2 1
DCL Device Clear (&H14) x 0 0 1 0 1 0 0
GET Group Execute Trigger (&H08) x 0 0 0 1 0 0 0
GTL Go To Local (&H01) x 0 0 0 0 0 0 1
LAG Listen Address Group (&H20-3F) x 0 1 a d d r n
LLO Local Lock Out (&H11) 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 Config x 1 1 0 S P2 P1 P0
PPD Parallel Poll Disable (&H70) x 1 1 1 0 0 0 0
PPU Parallel Poll Unconfig (&H15) x 0 0 1 0 1 0 1
SCG Second. Cmd. Group (&H60-7F) x 1 1 c o m m d
SDC Selected Device Clear (&H04) x 0 0 0 0 1 0 0
SPD Serial Poll Disable (&H19) x 0 0 1 1 0 0 1
SPE Serial Poll Enable (&H18) x 0 0 1 1 0 0 0
TAG Talker Address Group (&H40-5F) x 1 0 a d d r n
TCT Take Control (&H09) x 0 0 0 1 0 0 1
UNL Unlisten (&H3F) x 0 1 1 1 1 1 1
UNT Untalk (&H5F) x 1 0 1 1 1 1 1
(x = “don’t care”)