VME bus trap ignored

[Till Straumann]

Sorry for the extreme delay. Your message got 'lost' while I was
on vacation a while ago - I just found it.

Is this issue still of interest?

My apologies
- Till

On 08/05/2010 10:49 AM, Wolfgang Rostek wrote:
> Hi all,
>
> I'm doing some tests accessing VME bus addresses.
>
> I wonder that an invalid address is somehow tolerated by the Ada/RTEMS
> program but shows a correct trap using dBUG. No Ada exception handler
> seems to get invoked. Is it ok for the program to continue that way?
>
> The second  assignment 'abcd' I can verify in RAM after restart. (the 
> Memory_Address
> function is working for the whole address range)
>
> ---------------------------------------------------------------------------------------- 
>
> tip675_dummy : UNSIGNED_16 := 16#fedc#;
> for tip675_dummy'Address use Memory_Address(16#a0000000#);
>
> tip675_dummy2 : UNSIGNED_16 := 16#abcd#;
> for tip675_dummy2'Address use Memory_Address(16#40000000#);
>
> ---------------------------------------------------------------------------------------- 
>
>
> dBUG> md.l a0000000
> md.l a0000000
> A0000000:  FF
>
> VME Bus Time Out
>
> PC: F0001474 SR: 2004 [t.Sm.000...xnZvc]
> An: FE000000 F001F830 F001F848 F001F7DD F001F830 CBF5F311 F001F7CC 
> F001F7A8
> Dn: 00000000 00008600 00000046 FFFFFF00 00000000 00000008 00000008 
> 00000046
> F0001474: 0801 0002            BTST      #0x02,D1
> dBUG>
>
> Wolfgang Rostek
>
> Phone: +49 (89) 92 16-2183
> Fax: +49 (89) 92 16-162183
> wolfgang.rostek at esg.de
>
>
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>    

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