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From: Bob Latham <bob@sick-of-spam.invalid>
Newsgroups: comp.sys.acorn.programmer
Subject: Re: OS_File question
Date: Mon, 23 Feb 2026 14:22:03 +0000 (GMT)
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In article <dCF*kuXzA@news.chiark.greenend.org.uk>,
   Theo <theom+news@chiark.greenend.org.uk> wrote:
> Martin <News04@avisoft.f9.co.uk> wrote:
> > In article <5cafa1143ebob@sick-of-spam.invalid>,
> >    Bob Latham <bob@sick-of-spam.invalid> wrote:
> > > I would like to understand what this means...
> > 
> > > It's from PRM OS_File 13.
> > > If R0=13
> > >  R4 = pointer to control-character terminated comma separated path
> > > string.
> > > What does that mean? I can find no examples anywhere.
> > 
> > It means what it says! Remember a path ends in a full stop.
> > I assume that the 'comma separated' is referring to the register
> > separation, not the components of the path string, which are separated
> > by full stops (or colon)

> I assume it's a comma-separated list of paths, eg:

> ADFS::HardDisc4.$.Foo.,SCSI::USBstick.$.bar.etc.,System:,Resources:Apps.\0

Oh, I see, multiple paths that makes sense now. 

My problem was no full stop at the end of my path. I don't normally
use "paths." so forgot that. 


Thanks.
Bob.