• The comment character (!), which allows only comments.
16.4.18 Forgotten Password
If a user forgets the password, perform the following actions to recover:
1. Power off the machine.
2. Remove the security jumper from the I/O module, so that the console powers
up to the privileged state.
3. Power up the machine.
4. Enter the following command at the console prompt to clear the password so
the user can set a new password:
>>> D -PM -U -N:2 1E0200088 0 ! ZERO OUT THE PASSWORD
5. Issue the SET PASSWORD command to enter a new password.
6. Power down the machine.
7. Reinstall the security jumper on the I/O module.
8. Power up the machine.
16.4.19 Exiting from the Privileged State
When executed while the console is in the privileged state, the following console
commands reset CONS_PSWD<PRV> to 0 before beginning any other operation:
• BOOT (with any parameters)
• CONTINUE
• HALT
• START
16.5 Console Data Structures
The main CPU data structure used by the console is the Hardware Restart
Parameter Block (HWRPB). The HWRPB is a critical resource during powerfail
recoveries and other machine restarts. Figure 25 shows the general HWRPB
structure.
The size of the HWRPB in bytes can be calculated using the following formula:
SIZE = HWRPB[C8] + [ { (HWRPB[C8]+10) * 7 } + 2 ] * 8
where:
HWRPB[C8] = Memory descriptor offset
HWRPB[C8] contents = Number of memory clusters
The following sections describe each major HWRPB element.
16–32 Console
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