Chapter 8 System Debug Windows

A Typical Screen Display of CM Windows

A Typical Screen Display of NM Windows

Window Operations

Window Updates

Window Real/Virtual Modes

R - The CM Register Window

Gr - The NM General Registers Window

Sr - The NM Special Registers Window

P (cmP) - The CM Program Window

P (nmP) - The NM Program Window

Program Windows for Object Code Translation

Q - The CM Stack Frame Window

S - The CM Stack Window

G - The Group (of User) Window

The Command Window

U - The User Windows

V - The Virtual Windows

Z - The Memory Window

L - The LDEV Window

TX- The Text Windows

• The register window (R) displays the current CM register values

• The general register window (GR) displays the current NM general register values.

• The special register window (SR) displays the current values of a collection of special NM registers (including the space registers).

• The program window (P) tracks the program counter in the current mode (NM or CM). Current executing instructions are displayed and breakpoints are flagged. For convenience, the program window for one mode can also be accessed from the other mode with the fully qualified name (CMP or NMP).

• The frame window (Q) highlights the most recent CM stack marker. By default, this window displays addresses as unsigned DB-relative values. The user may choose to have addresses displayed relative to DB, Q, S, DL, or the DST base. Addresses may be displayed as signed or unsigned values. For details on these options, see the QM command. This window may also be aimed at any valid DST to which the user has access.

• The stack window (S) tracks the current CM top of stack. By default, this window displays addresses as unsigned DB relative values. The user may choose to have addresses displayed relative to DB, Q, S, DL the DST base. Addresses may be displayed as signed or unsigned values. For details on these options, see the SM command. This window may also be aimed at any valid DST to which the user has access.

• A group window (G) is a special window within which the user can custom-define individual user windows (UW). These user windows (subwindows) can be "aimed" at parameters, variables, data blocks, and so on. Up to three group windows can be defined.

• A virtual window (V) displays data at a native mode virtual address. Up to eight virtual windows are available.

• The memory window (Z) displays data at a native mode real address.

• The ldev window (L) displays the contents of secondary storage at the specified disk address expressed as a logical device (LDEV) and byte offset.

• A text window (TX) displays information in a text file. Up to three text windows are available.

• The command window provides space for the user to type interactive commands.