4.3.2 Status Panel Heading

The heading of the device and status panel is the small blue line just below the window title.

Figure 8: Device and Status Panel Title Line

The heading consists of the following information:

Hercules - CPU: nnn% - architecture mode Peripherals

“Hercules” and “Peripherals” is fix text, “CPU
nnn%” displays the overall CPU utilization of the host sys-
tem. The “architecture mode” field displays the current architecture mode as specified with the ARCHLVL
(or ARCHMODE) system parameter or console command or the architecture mode that the operating
system has switched to after the IPL.

4.3.3 Register Area

On top of the register area the current content of the Program Status Word (PSW) is displayed. The PSW
cannot be altered from the device and status panel. To alter the individual fields of the PSW the corres-
ponding “PSW” console command must be used after switching to the console panel.

Figure 9: Device and Status Panel Register Area

Below the PSW the registers are shown. The type of registers that are displayed can be selected through
pressing the first (highlighted) letter of their abbreviation as shown in the description line directly below
the registers:

GPR General Purpose Registers
CR Control Registers AR Access Registers FPR Floating Point Registers

The highlighted yellow letter indicates the currently displayed register type. The register types that are
selectable are marked with a highlighted white letter.

At the end of the register area there are two fields that are used to alter storage (address and data). They
are selectable through the highlighted white letters “R” and “D”. Pressing “R” allows it to specify the sto-
rage address to be updated. The default address is x’00000000’. Pressing “D” allows it to enter the data
to be updated at the specified address. To place the new data value at the specified address press “O”.

The display refresh rate of the register area is depending on the PANRATE setting. This may be anything
from 1 to 5000 milliseconds (between 0.001 and 5 seconds). The default refresh rate is 500 milliseconds.
Please note that a fast refresh rate may negatively impact the performance, beneath the fact you won’t be
able to read anything in the register area.

4.3.4 Operator Area

The operator area displays the current Hercules MIPS and I/O rates and has eight controls that can be
selected through the highlighted letter of their respective label. These controls are:

STO Place data value at address DIS Display main memory RST Restart interrupt STR Start all CPUs STP Stop all CPUs EXT Generate external interrupt IPL Initial Program Load PWR Power off Hercules

Figure 10: Device and Status Panel Operator Area

For several of these controls you will be prompted to confirm the function. IPL requires specifying a de-
vice through its prefixed letter as shown in the peripherals area. If the IPL device is not within the first 26
devices then it has no letter assigned and the IPL must be performed from the console panel through the
regular “IPL” console command.

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