Reading for the beginner

Sprow:

In that situation if you want to stop it booting you can just change the drive’s boot option with
*OPT 4,0
which is detailed in the BBC Master reference manual part 1 page G.5-8.

I’ve been reminded – off forum – that we should also point out to people that the reverse of the *OPT 4,0 is *OPT 4,2 …

Can’t find out how to post – could you mention it’s *OPT 4,2 to get the drive bootable again?

Anyway, now the breadcrumb trail to sign up is there JW can join in.

Is there not a complication here – Do SDFS, SCSIFS, FAT32fs and DOSFS actually set the OPT flag? I thought that they were just ‘hardwired’ to present OPT 4,2 so that you could boot from them?

Anyway, now the breadcrumb trail to sign up is there JW can join in.

I see that someone else as well as Steve has already mentioned the OPT 4,2 to reset booting. I was able to check this setting by going to the command line and typing a ‘.’ at the star prompt.

This is an alias for ‘cat’ set early in the system variables
(‘show’), and gives an old-fashioned directory listing with useful things like the OPT 4 setting, library directory, User Root Directory, Currently Selected Directory as well as the file permissions.

Doing this stuff in a task window (^F12) allows you to scroll about and save the results, though you can use the Shift and Control keys to exercise some control over the whizzy standard F12 listing.

Just another thing to have a look at!