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This chapter is from the book

Getting Help in OpenBoot

At any time, you can obtain help on the various Forth commands supported in OpenBoot by using the help command. The help commands from the ok prompt are listed in Table 3.2.

Table 3.2 - OpenBoot help Commands

Command

Description

help

Displays instructions for using the help system and lists the available help categories.

help <category>

Shows help for all commands in the category. You use only the first word of the category description.

help <command>

Shows help for an individual command.


Because of the large number of commands, help is available only for commands that are used frequently.

The following example shows the help command with no arguments:

ok help

The system responds with the following:

Enter 'help command-name' or 'help category-name' for more help
(Use ONLY the first word of a category description)
Examples: help select -or- help line
  Main categories are:
Repeated loops
Defining new commands
Numeric output
Radix (number base conversions)
Arithmetic
Memory access
Line editor
System and boot configuration parameters
Select I/O devices
Floppy eject
Power on reset
Diag (diagnostic routines)
Resume execution
File download and boot
nvramrc (making new commands permanent)
ok

If you want to see the help messages for all commands in the category diag, for example, you type the following:

ok help diag

The system responds with this:

test <device-specifier>  Run selftest method for specified device
 Examples:
  test floppy  - test floppy disk drive
  test net   - test net
  test scsi   - test scsi
test-all    Execute test for all devices with selftest method
watch-clock   Show ticks of real-time clock
watch-net    Monitor network broadcast packets
watch-net-all  Monitor broadcast packets on all net interfaces
probe-scsi   Show attached SCSI devices
probe-scsi-all Show attached SCSI devices for all host adapters
ok

If you want help for a specific command, you type the following:

ok help test

The system responds with the following:

test <device-specifier>  Run selftest method for specified device
 Examples:
  test floppy  - test floppy disk drive
  test net   - test net
  test scsi   - test scsi
test-all    Execute test for all devices with selftest method
watch-clock   Show ticks of real-time clock
watch-net    Monitor network broadcast packets
watch-net-all  Monitor broadcast packets on all net interfaces
probe-scsi   Show attached SCSI devices
probe-scsi-all Show attached SCSI devices for all host adapters
ok
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