Intel MCS48 User Manual page 378

8291
TABLE
2.
IEEE 488
INTERFACE
MESSAGE REFERENCE
LIST
Mnemonic
Message
Interface Function(s)
LOCAL MESSAGES
RECEIVED
(By
Interface
Functions)
*gts go
to
standby
C
ist individual status
PP
Ion
listen
only
L,
LE
Ipe
local
poll
enable
PP
nba
new
byte
available
SH
pon
power on SH,AH,T,TE,L,LE,SR,RL,PP,C
rdy
ready
AH
*rpp
request
parallel poll
C
* rsc request
system
control
C
rsv
request service
SR
rtl
return
to local
RL
*sic send
interface clear
C
*sre send remote enable
C
*tca take control asynchronously
C
*tcs take control synchronously AH,
C
ton
talk
only
T,
TE
REMOTE MESSAGES
RECEIVED
ATN
Attention
SH,AH,T,TE,L,LE,PP,C
DAB
Data Byte
(Via
L,
LE)
DAC
Data Accepted
SH
DAV
Data
Valid
AH
DCL
Device Clear
DC
END
End
(via
L,
LE)
GET
Group
Execute Trigger
DT
GTL
Go
to
Local
RL
IDY
Identify
L.LE.PP
IFC
Interface Clear
T,TE,L,LE,C
LLO
Local
Lockout
RL
MLA
My
Listen
Address L,LE,RL,T,TE
MSA
My
Secondary Address TE,LE,RL
MTA
My
Talk
Address T,TE,L,LE
OSA
Other Secondary Address
TE
OTA
Other
Talk
Address
T,
TE
PCG
Primary
Command
Group TE.LE.PP
TPPC
Parallel Poll
Configure
PP
t[PPD)
Parallel Poll
Disable
PP
t[PPE]
Parallel Poll
Enable
PP
*PPRn
Parallel Poll
Response N
(via
C)
tPPU
Parallel Poll
Unconfigure
PP
REN
Remote
Enable
RL
RFD
Ready
for
Data
SH
RQS
Request Service
(via
L,
LE)
[SDC]
Select
Device Clear
DC
SPD
Serial Poll
Disable
T,
TE
SPE
Serial Poll
Enable
T,
TE
*SQR
Service Request
(via
C)
STB
Status
Byte
(via
L,
LE)
*TCTor
[TCT] Take
Control
C
UNL
Unlisten
L,
LE
"These messages
are
handled only by
Intel's
8292.
tUndefined
commands
which may
be passed
to
the
microprocessor.
8-88
00229A