The M7516 DELQA is the Lance-based successor to the older M7504 DEQNA board (it's good to keep in mind that the DEQNA is not supported by VMS 5.x and above), a thin/thickwire Ethernet adapter. The module contains 32KB cache and 32KB ROM (firmware), the network cable connection is via a filtered AUI port on a patch panel insert. The cable between the DELQA and the Patch Panel is not the same as with the DEQNA.
SW1: CSR address (closed: 17774440 (vector at 120), open:
17774460 (floating vector))
SW3: Mode setting
SW4: Option setting
As you can see, the DELQA has fixed CSR addresses. The module can operate in two modes: one is normal DELQA mode, the other is the DEQNA lock (compatibilty) mode. These can be set with SW3: if it's set to on, the board is in normal mode, if it's off, the board is DEQNA-lock mode. Depending on this, SW4 is used for different purposes.
SW3 SW4 Normal mode 1 1 remote boot disabled Normal mode 1 0 remote boot enabled DEQNA-lock 0 1 sanity timer disabled DEQNA-lock 0 0 sanity timer enableLED diagnostics
There are three LEDs on the handle-side edge of the board. These too have different display functions in the two operating modes.
LED1 LED2 LED3 Normal mode 1 1 1 Unit ready Normal mode 1 0 0 Self-test running Normal mode 1 1 0 Loopback test DEQNA-lock 1 1 1 Normal operationBack to the top
|Created by: Ákos Varga||Last modified:|