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Re: USB card adapters crash Pi4

From Martin Gregorie <martin@mydomain.invalid>
Newsgroups comp.sys.raspberry-pi
Subject Re: USB card adapters crash Pi4
Date 2021-01-04 12:03 +0000
Organization A noiseless patient Spider
Message-ID <rsv06f$epp$3@dont-email.me> (permalink)
References (15 earlier) <20210103182819.478f6039@jresid.jretrading.com> <rst6cm$6g6$1@dont-email.me> <20210103211636.1f58d8de@jresid.jretrading.com> <rsth51$6g6$2@dont-email.me> <20210104093819.0f4062cb@jresid.jretrading.com>

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On Mon, 04 Jan 2021 09:38:19 +0000, Joe wrote:

> On Sun, 3 Jan 2021 22:40:33 -0000 (UTC)
> Martin Gregorie <martin@mydomain.invalid> wrote:
> 
>> On Sun, 03 Jan 2021 21:16:36 +0000, Joe wrote:
>> 
>> > On Sun, 3 Jan 2021 19:36:54 -0000 (UTC)
>> > Martin Gregorie <martin@mydomain.invalid> wrote:
>> >   
>> >> A fairly rapid web search failed to discover whether unsigned
>> >> arithmetic is a feature of the BASIC
>> > 
>> > There is no feature list of BASIC.
>> >  
>> I know that all so-called BASICs differ, some radically from the
>> original Dartmouth BASIC. I thought that the context would make it
>> plain that I was talking about PICAXE BASIC, which differs enough from
>> traditional BASICs to be given another name (labels not numbers for
>> branch destinations and subroutines, long names for variables, named
>> constants, unsigned arithmetic and comparisons, conditional statement
>> inclusion).
>> 
>> > No. All the arithmetic operators are signed,
>> >  
>> Not according to the current PICAXE BASIC manual, which gives numeric
>> ranges for 8 and 16 bit variables capable of containing byte values in
>> the range 0-255 and explicitly says that byte values are unsigned.
>> It alao says that 16 bit variable can hold 0-65535, which implies,
>> though it doesn't state, that these are unsigned.
> 
> Sorry, misunderstanding. I thought you were asking if PICAXE couldn't do
> signed because the underlying PIC processor couldn't handle signed.

No problem. At least this made me look at the PIC architecture and 
discover that it doesn't handle signed integers - I think its the only 
system I've know of at that doesn't, so I didn't realise at first that 
this limitation is in the hardware rather than a feature of the BASIC 
compiler.


-- 
--  
Martin    | martin at
Gregorie  | gregorie dot org

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Thread

USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-01 20:53 +0000
  Re: USB card adapters crash Pi4 Nikolaj Lazic <nlazicBEZ_OVOGA@mudrac.ffzg.hr> - 2021-01-01 23:32 +0000
    Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 00:52 +0000
      Re: USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-02 02:13 +0000
      Re: USB card adapters crash Pi4 "Dave Liquorice" <allsortsnotthisbit@howhill.com> - 2021-01-02 09:49 +0000
        Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 12:34 +0000
          Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 12:51 +0000
            Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 13:23 +0000
              Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 14:52 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:27 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 18:05 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 19:45 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-02 20:41 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-03 05:53 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 14:39 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-03 15:41 +0000
                Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-03 18:38 +0000
                Re: USB card adapters crash Pi4 Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2021-01-03 19:15 +0000
                Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-04 03:17 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 11:33 +0000
                Re: USB card adapters crash Pi4 Ahem A Rivet's Shot <steveo@eircom.net> - 2021-01-04 12:24 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 13:58 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 10:21 -0500
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 15:33 +0000
                Re: USB card adapters crash Pi4 Björn Lundin <b.f.lundin@gmail.com> - 2021-01-23 23:03 +0100
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-23 22:54 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-23 18:30 -0500
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-24 14:42 +0000
                Re: USB card adapters crash Pi4 Pancho <Pancho.Dontmaileme@outlook.com> - 2021-01-23 23:31 +0000
                Re: USB card adapters crash Pi4 Scott Alfter <scott@alfter.diespammersdie.us> - 2021-01-25 17:23 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-25 18:31 +0000
                Re: USB card adapters crash Pi4 Jim H <invalid@invalid.invalid> - 2021-01-25 18:47 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-26 10:59 -0500
                Re: USB card adapters crash Pi4 Scott Alfter <scott@alfter.diespammersdie.us> - 2021-01-26 17:13 +0000
                Re: USB card adapters crash Pi4 mjb@signal11.invalid (Mike) - 2021-01-26 23:11 +0000
                Re: USB card adapters crash Pi4 Richard Kettlewell <invalid@invalid.invalid> - 2021-01-25 18:55 +0000
                Re: USB card adapters crash Pi4 Dennis <dennis@none.none> - 2021-01-25 15:21 -0600
                Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-24 09:36 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 19:36 +0000
                Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-03 21:16 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-03 22:40 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-03 20:44 -0500
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 11:46 +0000
                Re: USB card adapters crash Pi4 Joe <joe@jretrading.com> - 2021-01-04 09:38 +0000
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 12:03 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 11:01 -0500
                Re: USB card adapters crash Pi4 Martin Gregorie <martin@mydomain.invalid> - 2021-01-04 17:15 +0000
                Re: USB card adapters crash Pi4 Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2021-01-04 14:03 -0500
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-05 06:17 +0000
              Re: USB card adapters crash Pi4 Deloptes <deloptes@gmail.com> - 2021-01-02 16:06 +0100
                Re: USB card adapters crash Pi4 A. Dumas <alexandre@dumas.fr.invalid> - 2021-01-02 16:36 +0000
                Re: USB card adapters crash Pi4 The Natural Philosopher <tnp@invalid.invalid> - 2021-01-02 16:38 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:29 +0000
                Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 17:18 +0000
                Re: USB card adapters crash Pi4 David Higton <dave@davehigton.me.uk> - 2021-01-02 20:21 +0000
            Re: USB card adapters crash Pi4 Theo <theom+news@chiark.greenend.org.uk> - 2021-01-03 10:07 +0000
              Re: USB card adapters crash Pi4 Theo <theom+news@chiark.greenend.org.uk> - 2021-01-03 18:39 +0000
          Re: USB card adapters crash Pi4 "Dave Liquorice" <allsortsnotthisbit@howhill.com> - 2021-01-02 13:08 +0000
  Re: USB card adapters crash Pi4 Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> - 2021-01-02 09:10 +0000
  Re: USB card adapters crash Pi4 druck <news@druck.org.uk> - 2021-01-02 12:36 +0000
    Re: USB card adapters crash Pi4 bob prohaska <bp@www.zefox.net> - 2021-01-02 20:45 +0000

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