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2 total messages Started by Ian East Thu, 23 Aug 1990 11:02

#925

Author: Ian East
Date: Thu, 23 Aug 1990 11:02

21 lines
975 bytes

Subject: Memstart


Here's one for Inmos?

Everyone seems to assume the T400 is a "stripped down" T414. However, I
wasted a lot of time to discover that MemStart for the T400 is the same
as that for a T8! Which leaves me two questions...

1. Ok it states the correct MemStart in the T400 data sheet but why not
   warn people LOUDLY that they must compile for T8? This is the sort of
   thing that really pisses people off.

2. How does the debugger find out the correct value of MemStart? Is there
   a hidden location or some test that works?

Cheers

Ian East
University of Buckingham
ian%buck@ukc

Re: (none)

#934

Author: Rob Kurver
Date: Thu, 23 Aug 1990 17:22

29 lines
1721 bytes

In <12563.9008231102@buck.ac.uk> ian@buckingham.ac.uk (Ian East) writes:

>Everyone seems to assume the T400 is a "stripped down" T414. However, I
>wasted a lot of time to discover that MemStart for the T400 is the same
>as that for a T8! Which leaves me two questions...

I'm not sure I understand why you wanna know the value of MemStart?
Doesn't the compiler/linker/loader/booter/OS take care if this for you?

>1. Ok it states the correct MemStart in the T400 data sheet but why not
>   warn people LOUDLY that they must compile for T8? This is the sort of
>   thing that really pisses people off.

If you compile for T8, the compiler starts emitting FP instructions.
Clearly not wanted if the chip doesn't have these (and doesn't even trap on
them)...

>2. How does the debugger find out the correct value of MemStart? Is there
>   a hidden location or some test that works?

Boot the transputer with a little program.  Find the address this program
is loaded at (using ldpi).  This tells you the value of MemStart.  That's
how my debugger does it, anyways.

--
Rob Kurver                          rob@dutncp8.tudelft.nl
Computational Physics Group         rob@pact.nl
Faculty of Applied Physics, Delft University of Technology
The moving cursor writes, and having written, blinks on.

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