[BUG] Attempting to configure the keyboard in RISC OS 3 locks up the emulator

[RichardBrown384]

Describe the bug
Attempting to configure the keyboard using the RISC OS 3 !Configure App locks up the emulator

To Reproduce
Steps to reproduce the behaviour:

1. Start Emulator
2. Double click on Apps
3. Double click on !Configure
4. Click on the !Configure App in the Icon Bar
5. Click on the Keyboard icon
6. Emulator locks up

Expected behaviour
When the keyboard icon is clicked upon the keyboard configuration window should appear.

Please complete the following information

• Current HEAD

Additional context
None

[RichardBrown384]

Immediately prior to opening the keyboard configuration window the OS accesses CMOS addresses 0x4d, 0x4c and 0x4b.

Subtracting 64 from these addresses gives us CMOS locations 13 (keyboard auto repeat), 12 (keyboard delay) and 11 (misc configuration). RISC OS documentation.

The one that makes a difference is location 11 which contains the Shift Caps, No Caps and Caps settings.

The valid bit patterns are

Bits	Setting
001	Shift Caps
010	No Caps
100	Caps

With a CMOS that is all zero, none of these bit patterns match and this is likely the reason that the window locks up trying to set the appropriate, non-existent, radio button.

This is connected to #2 and #9

[RichardBrown384]

Resolved by #26