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Two differences between the CodeView debugger and previous Microsoft
debuggers may be confusing at first. The command for getting a summary
help screen is H, not ? as in the earlier debuggers. Also, the
CodeView debugger expects initial input in decimal, not in
hexadecimal. You can enter hexadecimal numbers in the FORTRAN format (for
example, #3CC2). You can also change the radix to hexadecimal or
octal using the Radix command (for example, N16 for hexadecimal).

If you do not have an IBM or IBM-compatible computer, this may be all
the information you need to start experimenting. If you have an IBM
Personal Computer or a compatible computer capable of using CodeView's
window mode, there are easier ways of doing many of the tasks shown
above.