can I stop the Tube on a non-Master OS?
To the Tube code there's no such thing as the "internal" or "external" Tube. It's just there at &FEFx. It's a bit in the IOACC register that determines where access to &FEFx goes to, so switching to pre-MOS3 will access whatever the hardware was set to before you pressed BREAK.BeebMaster wrote: ↑Wed Feb 21, 2024 5:39 pm This is interesting because on the one hand I would expect OS 1.20 to recognise the Tube simply because the second processor is "powered on" (as there's no way exactly of unpowering an internal co-processor) but on the other hand I wouldn't expect OS 1.20 to know to look for a second processor on the internal Tube interface.
The first one is the Tube Client responding, the next one is the Tube Host responding after the client has passed the command over to the host.
Code: Select all
$ bbcbasic
PDP11 BBC BASIC IV Version 0.45
(C) Copyright J.G.Harston 1989,2005-2024
>_I've read this thread a couple of times and there's not quite enough detail for me to determine if there is an MMFS bug or not.
Thanks - I'm gathering my thoughts - apart from *ROMS telling me "Model B MMFS 1.55" is there anything else you'd need to know about which version it is? The EPROM was supplied with the machine, so I don't know exactly which image was used to create it.
What happens if you *KILL DFS instead of MMFS? i.e. is the issue linked to having both file systems (or Tube Host Codes) active at the same time?
Oddness happens. The tube banner is still there, but PAGE is at &1F00 and JGH's *TEST65 utility no longer works.
Hehe, yes I have Ctrl-CAPS-Break to do similar.
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$ bbcbasic
PDP11 BBC BASIC IV Version 0.45
(C) Copyright J.G.Harston 1989,2005-2024
>_I'm feeling a bit guilty here, because it was me that asked about the MultiOS version. I assumed (wrongly) because it contained the latest MMFS version, and some other unusual ROMs, that you had built this image up yourself. But looking more closely, MMFS is in a seperate ROM in slot 8.
Don't worry - I'm the one who was clumsy - and you asked a fair question! 40 years ago swapping ROMs in my BBC B seemed easy. But that was then. I've since realised I bought a MOS 3.20 ROM "just in case" (of what, I don't know) so I should be able to get it running again if needed.
Both were installed in the (refurbished) computer when I bought it.I assumed (wrongly) because it contained the latest MMFS version, and some other unusual ROMs, that you had built this image up yourself. But looking more closely, MMFS is in a seperate ROM in slot 8.
Seems I do own a soldering iron. But neither it nor I are up to soldering wires onto pins.This can usually be repaired by soldering a piece of thin solid core wire to what remains of the pin.
](./images/smilies/eusa_wall.gif "Brick wall"){kind=small}
