Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 144)

II. SOFTWARE GUIDES - 8. Driver488/DRV 8P. Command Descriptions
Personal488 User’s Manual, Rev. 3.0 II-129
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.
The bus states are further described, according to the following bus lines:
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 (&H07) x 0 0 0 0 1 1 1
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”)