the AMAL Editor

[Run Selected] or [F3]
This performs the same task as [Run Current] or [F2], but instead of the current single program, the highlighted program in the Selection Window will be run.

[Monitor] or [F4] The AMAL Monitor
As soon as this option is selected, a new screen is displayed featuring all of the AMAL Monitor options. This monitoring device allows you to step through your program one instruction at a time. At the top of the Monitor screen there is a selection window, showing the list of currently active programs. All of these programs will be executed simultaneously, so you must de-activate any that you are not immediately interested in. Click on any of these, to turn off the highlight selection.

Because all of the AMAL registers can be accessed directly from this screen, it is very simple to isolate any errors and cure them. All options are selected by clicking on the screen, or by pressing the associated key. To cancel a selection, simply press the [Esc] key. Here are the operating steps for using the AMAL Monitor:

• Initialise. Before using any of the Monitor options, press [I] or click on [Init screen and AMAL], which is the initialisation option at the top of the right-hand option stack. This runs the environment routine and prepares the Monitor for use.
• External Registers. On the left of the Monitor window there are two vertical displays, showing all 26 of the external registers, from RA to RZ. These can be changed at any time by clicking on the chosen register with the left mouse button, then entering a new value in hexadecimal.
• Internal Registers. The central panel displays the internal registers in the format R(channel number,register number). Each AMAL program has its own individual set of internal registers, and they can be examined by clicking on one of the direction-arrow icons underneath the Internal register display panel, to display R(0,0) up to R(15,9). To set a register, highlight it with the left mouse button, and enter a new hexadecimal value from the keyboard.
• Option Panel. You may test your routine by selecting any of the other options in the right- hand panel, once the system has been initialised. These are self-explanatory, as follows:

[R] or [Run until key press]
[G] or [Go until Reg=Value]
[S] or [Perform one step]
[Esc] or [Quit Monitor]

We will now examine the final option in the [Edit] menu, which is to be found below the [Monitor] option.

[Play Editor] or [F5]
Two sub-menus are offered here, [Back to String Editor Esc] will take you straight back to the main String Editor Window. The alternative option allows you to exploit some AMAL magic! This [Movement] menu is explained next.

[Movement]
Here are the options available from this sub-menu, from top to bottom: