14 Feb
2002
14 Feb
'02
11:30 p.m.
On Fri, Feb 01, 2002 at 10:24:30AM +0000, P.A.Osborne wrote:
The reason I want the compiler is that it will
generate standalone 16
bit code on a sensible platform. GCC doesnt produce 16 bit code as
far as I am aware - so personally I thought it would be amusing (I
must be mad) to use tools that run under DOS (well OS/2).
support for PDP-11 was added to gcc a few months ago. I don't think
it's been well tested, but support exists in current versions of
binutils and gcc.
http://pdp11.nocrew.org/
there's also support for the m68hc11/12 which are 16-bit.
it seems like support for 80{,1,2}86 in gcc should be possible; it just
hasn't been done yet.
another compiler that might be worth looking at is SDCC
http://sdcc.sourceforge.net/ which is currently targeted towards 8-bit
MCUs.
of course bootstrapping via the original K&R compiler would be the
"classic" way to do it, though. ;)
--
Aaron J. Grier | "Not your ordinary poofy goof." | agrier(a)poofygoof.com
"[...] I generally haven't found IDM guys to be very good
live acts, most of them just sit down at their laptop and
tweak reaktor." -- Brandon Daniel
15 Feb
15 Feb
4:08 a.m.
New subject: Porting Unix v6 to i386
On 2002-Feb-14 14:30:50 -0800, "Aaron J. Grier" <agrier(a)poofygoof.com>
wrote:
support for PDP-11 was added to gcc a few months ago.
I don't think
it's been well tested, but support exists in current versions of
binutils and gcc.
http://pdp11.nocrew.org/
there's also support for the m68hc11/12 which are 16-bit.
This is only cross-compilation support. gcc was never designed to be
hosted in a 16-bit environment. An i386 gcc is:
text data bss dec hex filename
1660236 22836 97104 1780176 1b29d0 /usr/libexec/cc1
Even taking into account the savings with 16-bit int's and pointers,
you won't get the data segment below 64k - and most of gcc's structures
are dynamically allocated.
it seems like support for 80{,1,2}86 in gcc should be
possible; it just
hasn't been done yet.
Given that i386 is already supported, adding support for 16-bit x86
would be fairly easy. The only major work would be handling the
16-bit addressing modes.
another compiler that might be worth looking at is
SDCC
http://sdcc.sourceforge.net/ which is currently targeted towards 8-bit
MCUs.
Again, no x86 support and I don't believe the code generation is
that good.
of course bootstrapping via the original K&R
compiler would be the
"classic" way to do it, though. ;)
The PDP-11 is orthogonal and so PCC doesn't have to worry about
getting particular operands into particular registers. I suspect
that supporting the i386's idiosyncracies would be non-trivial.
Peter
9:08 a.m.
New subject: Porting Unix v6 to i386
"Aaron J. Grier" <agrier(a)poofygoof.com> writes:
It's still there, and some people are looking after it from time to
time, but it's probably too broken to be useful. However, there has
been some interest in building a complete GNU cross tool chain for the
PDP-11.
--
Lars Brinkhoff http://lars.nocrew.org/ Linux, GCC, PDP-10,
Brinkhoff Consulting http://www.brinkhoff.se/ HTTP programming
support for PDP-11 was added to gcc a few months ago.
I don't think
it's been well tested, but support exists in current versions of
binutils and gcc.
You are confusing gcc and binutils. PDP-11 support as added to
binutils recently. However, it's not well tested, and is likely
to need more work to be usable.
John Holden <johnh(a)psych.usyd.edu.au> writes:
support for
PDP-11 was added to gcc a few months ago.
It's been around since 1991 as a
patch, but it didn't keep up with
the newer versions of gcc
8313
days inactive
8314
days old
2 comments
3 participants
participants (3)
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Aaron J. Grier -
Lars Brinkhoff -
Peter Jeremy