WOODWARD 5466-250 Servo speed governor

The following VMEbus disk/tape controller modules are supported by the 187Bug. The default address for each controller type is First Address and the controller can be addressed by First CLUN during commands BH, BO, or IOP, or during TRAP #496 calls .DSKRD or .DSKWR. Note that if another controller of the same type is used, the second one must have its address changed by its onboard jumpers and/or switches, so that it matches Second Address and can be called up by Second CLUN.

The VMEbus network controller modules supported by MVME187Bug are shown in Table C-1. The default address for each type and position is shown to indicate where the controller must reside to be supported by MVME187Bug

Solving Startup Problems

❏ Try these simple troubleshooting steps before calling for help or sending your CPU board back for repair. ❏ Some of the procedures will return the board to the factory debugger environment. (The board was tested under these conditions before it left the factory.) 

❏ Selftest may not run in all user-customized environments.

Make sure the system is plugged in. 2. Check that the board is securely installed in its backplane or chassis. 3. Check that all necessary cables are connected to the board, per this manual. 4. Check for compliance with System Considerations, in Chapter 3. 5. Review the Installation and Startup procedures

The EIA-232-D standard is the most common

 terminal/computer and terminal/modem interface, and yet it is not fully understood. This may be because not all the lines are clearly defined, and many users do not see the need to follow the standard in their applications. Often designers think only of their own equipment, but the state of the art is computer-to-computer or computer-tomodem operation. A system should easily connect to any other system. The EIA-232-D standard was originally developed by the Bell System to connect terminals via modems. Several handshaking lines were included for that purpose. Although handshaking is unnecessary in many applications, the lines themselves remain part of many designs because they facilitate troubleshooting.

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