WOODWARD 5466-031 governor

In commands with range specified as addr del addr, and with size option H or W chosen, data at the second (ending) address is acted on only if the second address is a proper boundary for a half-word or word, respectively. Otherwise, the range is truncated so that the last byte acted upon is at an address that is a proper boundary.

These logical port numbers (0 and 1) are shown in the pinouts of the MVME187 as “SERIAL PORT 1" and “SERIAL PORT 2", respectively. Physically, they are all part of connector P2.

There are various ways to enter a user program into system memory for execution: ❏ Create the program with the assembler/disassembler ❏ Download an S-record object file ❏ Read the program from disk

Offset Registers

 Eight pseudo-registers (Z0 through Z7) called offset registers are used to simplify the debugging of relocatable and positionindependent modules. The listing files in these types of programs usually start at an address (normally 0) that is not the one at which they are loaded, so it is harder to correlate addresses in the listing with addresses in the loaded program. The offset registers solve this problem by taking into account this difference and forcing the display of addresses in a relative address+offset format. Offset registers have adjustable ranges and may even have overlapping ranges. The range for each offset register is set by two addresses: base and top. Specifying the base and top addresses for an offset register sets its range. In the event that an address falls in two or more offset registers' ranges, the one that yields the least offset is chosen.

Port Numbers 

Some 187Bug commands give the user the option to choose the port to be used to input or output. Valid port numbers which may be used for these commands are: 1. MVME187 EIA-232-D Debug (Terminal Port 0 or 00) (PORT 1 on the MVME187 P2 connector). Sometimes known as the “console port”, it is used for interactive user input/output by default. 2. MVME187 EIA-232-D (Terminal Port 1 or 01) (PORT 2 on the MVME187 P2 connector). Sometimes known as the “host port”, this is the default for downloading, uploading, concurrent mode, and transparent modes.

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