CPU Controls

L - IPL

S - Start CPU

E - External interrupt

P - Stop CPU

W - Power down (exit Hercules)

T - Restart interrupt

Storage Update

R - Enter address to be updated

D - Enter data to be updated at address

O - Place data value at address

Peripherals

N - Enter new name for the device

U - Send an I/O attention interrupt

Pressing “?” displays a help page that explains briefly all the shortcuts available in the device and status
panel. Pressing “ESC” again leaves the help page and returns to the device and status panel.

Figure 7: Hercules Help Panel

4.3.1 Window Title

The window title is the same as described under section

4.2.1 . There is no possibility to have different
window titles for the panels of the Hercules emulator.

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
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