A-B 1786-RPFRL Logic sequence module

In order for high-baud rate serial communication between 187Bug and the terminal to work, the terminal must do some form of handshaking. If the terminal being used does not do hardware handshaking via the CTS line, then it must do XON/XOFF handshaking. If you get garbled messages and missing characters, you should check the terminal to make sure XON/XOFF handshaking is enabled. Refer to Configuring a Port under the PF (Port Format) command in the Debugging Package for 88K RISC CPUs User’s Manual.

If the confidence test fails, the test aborts when the first fault occurs. If possible, an appropriate message is displayed, and control then returns to the menu (refer to Chapter 4, Debugger General Information, and Chapter 5, Using the 187Bug Debugger for ENV and MENU commands).

Initializing the Real-Time Clock 

The onboard real-time clock (RTC) is backed up with a selfcontained battery. Before shipment of this board, the clock of the RTC device was stopped to preserve battery life. The board’s “Selftests” (ST) and operating systems require the clock of the RTC to be operating. Table 3-15 shows the steps required to initialize the RTC, depending on the mode. Examining and/or Changing Environmental Parameters Use the 187Bug’s ENV command to verify the NVRAM (BBRAM) parameters, and optionally use ENV to make changes to the Environmental parameters. Refer to Appendix A for the Environment parameters.

Programming the PCCchip2 and VMEchip2 

See System Considerations below, and refer to Memory Maps on page 2-24, and the Single Board Computer Programmer's Reference Guide for details of your particular system environment.Stop the auto-boot sequence by pressing thekey. (If the system has already started and failed a confidence test in system mode, you should be in the debugger menu).

The MVME187 needs to draw power from both P1 and P2 of the VMEbus backplane. P2 is also used for the upper 16 bits of data for 32-bit transfers, and for the upper 8 address lines for extended addressing mode. The MVME187 may not operate properly without its main board connected to P1 and P2 of the VMEbus backplane.

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