ii 916895 DBK Option Cards & Modules User’s Manual
4 - IEEE 488 Primer
History …… 4-1
General Structure …… 4-1
Send It To My Address …… 4-3
Bus Management Lines …… 4-3
Attention (ATN) …… 4-3
Interface Clear (IFC) …… 4-3
Remote Enable (REN) …… 4-3
End or Identify (EOI) …… 4-3
Service Request (SRQ) …… 4-3
Handshake Lines …… 4-4
Data Valid (DAV) …… 4-4
Not Ready for Data (NRFD) …… 4-4
Not Data Accepted (NDAC) …… 4-4
Data Lines …… 4-4
Multiline Commands …… 4-5
Go To Local (GTL) …… 4-5
Listen Address Group (LAG) …… 4-5
Unlisten (UNL) …… 4-5
Talk Address Group (TAG) …… 4- 5
Untalk (UNT) …… 4-5
Local Lockout (LLO) …… 4-5
Device Clear (DCL) …… 4-5
Selected Device Clear (SDC) …… 4-5
Serial Poll Disable (SPD) …… 4-5
Serial Poll Enable (SPE) …… 4-5
Group Execute Trigger (GET) …… 4-5
Take Control (TCT) …… 4-5
Secondary Command Group (SCG) …… 4-5
Parallel Poll Configure (PPC) …… 4-6
Parallel Poll Unconfigure (PPU) …… 4-6
More On Service Requests …… 4-6
Serial Poll …… 4-6
Parallel Poll …… 4-6
5 - Service Information
Factory Service …… 5-1
Theory of Operation …… 5-1
Digital488 Mother Board …… 5-2
Digital488 I/O Board …… 5-4
Digital488/32/OEM …… 5-5
Digital488/OEM …… 5-6
Appendix A Digital488 Command Summary
Appendix B IEEE Command and Address
Messages
Appendix C Digital488/OEM Mechanical
Dimensions
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