A library command that lists and analyses the Dynamic Areas in your system. It can sort by number, name or base address (where, as shown above, it shows the gaps too). And crucially it analyses the actual address space usage to illustrate just how wastefully large most DAs are.

It’s rare that a DA needs to store large things, it usually needs to store lots of small things, so there really is no need to have just one large DA reserving a huge amount of address space – reserve a much smaller size and create additional DAs if it gets full!

RO5’s “PMPs” (a large DA in a small address window) would be a reasonable solution if there was a “PMP” module for other OSes, but of course there isn’t – any feature that can only be used on one version of the OS is merely an implementation detail, not a RISC OS API (and that applied to the actions of ROLtd just as much as it now does to ROOL).

Especially useful to developers, but everyone should be able to see how their operating system actually works. Vectors are probably the most important part of RISC OS after SWIs, but are philosophically even more important – they are what make this OS the colander it is: Completely open, mutable, and customisable. Vectors are the greatest part of RISC OS.

They’re also rather inscrutable, normally. So *Vectors will list the claimants of a vector (or all of them if you wish), with offsets into modules (if you’re disassembling them) and function names (if provided). This is also a good way of finding orphaned claimants after you’ve force-killed a module, or you’re developing one and have futzed it up.

Provides the missing [English] help text for the Kernel’s *Status/*Configure commands:

Baud, Boot, Caps, Data, Delay, Dir, DumpFormat, FontSize, Ignore, Language, Loud, Mode, MonitorType, MouseStep, MouseType, NoBoot, NoCaps, NoDir, NoNumLock, NoScroll, NumLock, Print, PrinterBufferSize, Quiet, RamFsSize, Repeat, RMASize, ScreenSize, Scroll, ShCaps, SpriteSize, Sync, SystemSize, TV, WimpMode

As such, it’s the largest module I’ve ever produced that contains absolutely no code whatsoever.

On the BBC Micro you could type *FX0 without any difficulty, but in RISC OS the digits are regarded as part of the command name, so it has to go to special lengths to make that command work. AutoCLIspc extends the same leniency to all star commands.

If you type something ending in digits which does not match any built-in command, library command or runnable file, AutoCLIspc inserts a space before the digits and tries again.