[Oberon] RISC5

[eas lab]

On 18 April 2014 13:14,  <Aubrey.McIntosh at alumni.utexas.net> wrote (in part):
> IMPORT SYSTEM
>
[...]
>
> I think it is very open.  It is documented everywhere, and has been part of
> Wirth's languages for a long time, possibly as early as Modula-2.

Nemo wrote:-
]Yes -- it is in Modula-2.
]
]Further to this thread, look at the source for the compiler.  The
]initialisation part of the parser enters "SYSTEM", "VAL", "VAR", and
]all the other special procedures into the symbol table, each with its
]own "type" and pre-determined rules.  When the parser finds one of
]these special types, instructions are generated according to
]pre-determined rules.

Which compiler?
Under linux with this CRAP! gmail, I 'looked' at V4's compile which is
in AOS-format....It's not easy! I'd prefer to find & examine V5's compiler.
---
I'm guessing that eg. SYSTEM.Move(source, destination, byteCount)
would be compiled into a <PseudoCode block sequence of bytes>,
depending on the hardware-architecture.
Eg. perhaps resulting in the byte-sequence:
<Mbytes><byteCount><Nbytes><destinationAdr><Ibytes><sourceAdr>
Where that byteSequence, is the sequence of machineCodes which
would: Move(source, destination, byteCount)
---
So that porting to a different architecture, just means replacing the
pseudoCode byte sequence/S?

== Chris Glur.



On 4/20/14, Nemo <cym224 at gmail.com> wrote:
> On 18 April 2014 13:14,  <Aubrey.McIntosh at alumni.utexas.net> wrote (in
> part):
>> IMPORT SYSTEM
>>
> [...]
>>
>> I think it is very open.  It is documented everywhere, and has been part
>> of
>> Wirth's languages for a long time, possibly as early as Modula-2.
>
> Yes -- it is in Modula-2.
>
> Further to this thread, look at the source for the compiler.  The
> initialisation part of the parser enters "SYSTEM", "VAL", "VAR", and
> all the other special procedures into the symbol table, each with its
> own "type" and pre-determined rules.  When the parser finds one of
> these special types, instructions are generated according to
> pre-determined rules.
>
> N.
>
> --
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