User`s manual

The diagnostics diskette in conjunction with the loopback connector is designed to verify correct installation. Make a copy
of this disk and store the original. Should a problem develop in the future, you can run the diagnostics to locate the
problem.
NOTE
Before beginning the diagnostics program, make sure no devices are connected to the SYNC/570i-56 ports. When prompted by
the diagnostics program, install the loopback connector.
Your system must be running DOS in order to use the diagnostics program.
The diagnostics tests one board at a time. Although the active board by default is the ISA board at the highest I/O address or
the Micro Channel board at the highest slot number, you may change the active board. The screen header indicates the
active board and its address.
The tests will fail if there is an address or interrupt conflict. If the diagnostics cannot determine your switch settings, there
is probably a conflict. In this case, try other address and/or interrupt settings.
For an ISA system, the diagnostics program displays IRQ, the base memory address, and the base I/O address. You may
modify the address and IRQ selections from the diagnostics. The IRQ must be active, and you must select a non-zero
address. If you cannot determine a setting, call Digi Customer Support for assistance.
For a Micro Channel system, the diagnostics program displays the current POS registers which identify the IRQ, the base
memory address, and the base I/O address. If any of these parameters need to be changed, repeat the procedure in beginning
on Page 13. If you cannot determine a setting, call Digi Customer Support for assistance.
1. Insert the diagnostic disk into Drive A.
2. Type A:SYNC570 to start the diagnostics.
3. Follow the instructions on the screen.
When IRQ and address selection are acceptable, the adapter memory is tested. The test does write/verify at every
location with word accesses only. Each 16K memory window is selected and tested independently. Address and data buses
are tested separately.
The program then runs a window uniqueness test. A different, single word is written to each of the eight 16K
windows; then the test reads each window to verify that the windows are indeed unique.
When prompted, install the Telco loopback connector on the Telco connector. The wiring diagram for the loopback
connectors is shown below. The diagnostics program tests the control and data lines. When the line 1 tests are complete,
install the single channel loopback connector onto the V.35/EIA-232 cable connector. The tests will be repeated for line 2.
The control line loopback tests RTS to CTS, and DTR to DSR to DCD. The data loopback test is the default single channel
chained-block DMA transfer mode test.
Figure 4, Female loopback connector wiring diagrams
V.35/RS 232 Telco