Debugging; Integrated Bios Debugger; Using Other Debuggers - Technologic Systems TS-5700 User Manual

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TS-5700 User's Manual

17 Debugging

There are two main methods for debugging on the TS-5700: using the integrated BIOS debugger (INT3) and/or

using your development tool's debugger (this usually requires the

To provide simple, direct access to the TS-5700 hardware, the system BIOS has an integrated debugger that

can perform standard low-level debugger functions. The debugger allows you to perform operations such as

disassemble code, display and alter the contents of memory, write to and read from I/O ports, and single-step

through or breakpoint code. The debugger is not intended for use as the only debugging tool for applications,

but it can be a real lifesaver when you need interactive, direct access to hardware.

The BIOS debugger can be entered by any of several methods:

The debugger hooks the CPU exception vectors in case a divide by zero occurs, an invalid opcode is

executed, or an INT 3 instruction is executed, for example. By placing an INT 3 instruction in your

application code the debugger will automatically be invoked. To resume, type the 'G' command to "GO",

or continue on with the rest of initialization.

From DOS-ROM by typing 'INT3' at the command prompt. If the full command.com interpreter is running,

this is an internal command. If only mini-command.com is running, this will execute a small utility that

simply contains an 'INT 3' instruction.

From the BIOS Setup main menu (started by typing 'ctrl-C' during the BIOS POST), the ENTER SYSTEM

BIOS DEBUGGER selection will enter the debugger. After use, typing the 'G' (go) command will return to

the SETUP screens.

As a boot action, as a last-ditch effort if the operating system cannot be booted from the appropriate

drives or out of ROM.

A complete discussion of debugger commands is available in the Integrated BIOS Debugger Reference Manual,

included on the TS-5700 Utility Disk and also available from the

list all available commands, and a 'g' (go) will return execution to the point where the debugger was called.

The Turbo C debugger can be used on the target board using the TS-9500 video and keyboard interfaces. Any

other standard PC software debugger of your choice should work just as well.

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TS-9500

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video and keyboard).

Entering '?' will

5/2009

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