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Groups > comp.lang.python > #51772
| From | Dennis Lee Bieber <wlfraed@ix.netcom.com> |
|---|---|
| Subject | Re: PEP8 79 char max |
| Date | 2013-08-01 20:39 -0400 |
| Organization | IISS Elusive Unicorn |
| References | (5 earlier) <CAN1F8qXS6H3dV6jZSJ_N6NTOQjrKKzy8h5uO3LZAWjsCXPmYKA@mail.gmail.com> <mailman.8.1375268124.1251.python-list@python.org> <ktbe6u$or0$1@reader1.panix.com> <mailman.82.1375378233.1251.python-list@python.org> <ktecu2$m8d$1@reader1.panix.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.101.1375403951.1251.python-list@python.org> (permalink) |
On Thu, 1 Aug 2013 19:29:06 +0000 (UTC), Grant Edwards
<invalid@invalid.invalid> declaimed the following:
>
>I got tired of hand assembling (and disassembling) code for a custom
>microprocessor, so I wrote an assembler and a disassembler.
Let me know when you recreate XDS meta-symbol. It didn't even have the
Sigma native instruction set built in, one had to specify the instruction
set using a "system" directive. What it did have was a directive to define
instruction formats (my manuals are in storage so this is pseudo-code).
MOV opt,2,3,3 b'01',af(1),af(2)
Which translates as: mnemonic is MOV, format is 2-bits, 3-bits, 3-bits,
first field is binary 01, second field is argument field 1, third field is
argument field 2. Granted, the Sigma was a 32-bit machine, but one could
create an absolute image cross assembler by just defining a bunch of the
above. I forget the opcode for the 8080, but that line would define the
8080 MOV instruction (given that one had defined numeric values for the
register symbols...
MOV A,D
parameters could come from label, command, or argument field
MOV opt,2,3,3 b'01',cf(2),af(1)
would change the source syntax to
MOV,A D
and for insanity
MOV opt,2,3,3 b'01',lf(2),af(1)
would give
,A MOV D
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/
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Re: PEP8 79 char max Devyn Collier Johnson <devyncjohnson@gmail.com> - 2013-07-29 16:24 -0400
Re: PEP8 79 char max Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-29 21:42 +0000
Re: PEP8 79 char max Devyn Collier Johnson <devyncjohnson@gmail.com> - 2013-07-29 18:30 -0400
Re: PEP8 79 char max Ed Leafe <ed@leafe.com> - 2013-07-29 17:54 -0500
Re: PEP8 79 char max Vito De Tullio <vito.detullio@gmail.com> - 2013-07-30 19:08 +0200
Re: PEP8 79 char max Joshua Landau <joshua@landau.ws> - 2013-07-30 18:42 +0100
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-07-30 17:52 +0000
Re: PEP8 79 char max Joshua Landau <joshua@landau.ws> - 2013-07-31 07:16 +0100
Re: PEP8 79 char max Tim Chase <python.list@tim.thechases.com> - 2013-07-31 05:56 -0500
Re: PEP8 79 char max Neil Cerutti <neilc@norwich.edu> - 2013-07-31 13:02 +0000
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-07-31 16:35 +0000
Re: PEP8 79 char max Marcelo MD <lists.md@gmail.com> - 2013-07-31 14:45 -0300
Re: PEP8 79 char max Neil Cerutti <neilc@norwich.edu> - 2013-07-31 17:59 +0000
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-07-31 18:16 +0000
Re: PEP8 79 char max Neil Cerutti <neilc@norwich.edu> - 2013-07-31 18:37 +0000
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-07-31 18:56 +0000
Re: PEP8 79 char max Neil Cerutti <neilc@norwich.edu> - 2013-07-31 19:25 +0000
RE: PEP8 79 char max "Prasad, Ramit" <ramit.prasad@jpmorgan.com.dmarc.invalid> - 2013-07-31 18:33 +0000
Re: PEP8 79 char max Skip Montanaro <skip@pobox.com> - 2013-07-31 13:05 -0500
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-07-31 16:32 +0000
Re: PEP8 79 char max Tim Chase <python.list@tim.thechases.com> - 2013-07-31 13:19 -0500
Re: PEP8 79 char max Tim Chase <python.list@tim.thechases.com> - 2013-07-31 13:24 -0500
Re: PEP8 79 char max Joshua Landau <joshua@landau.ws> - 2013-08-01 18:21 +0100
Re: PEP8 79 char max Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-01 19:03 +0000
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-08-01 19:29 +0000
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-08-01 19:53 +0000
Re: PEP8 79 char max Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-08-01 20:39 -0400
Re: PEP8 79 char max Grant Edwards <invalid@invalid.invalid> - 2013-08-02 13:58 +0000
Re: PEP8 79 char max Wayne Werner <wayne@waynewerner.com> - 2013-08-03 06:23 -0500
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-05 15:21 -0700
Re: PEP8 79 char max Terry Reedy <tjreedy@udel.edu> - 2013-09-05 21:47 -0400
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-05 19:59 -0700
Re: PEP8 79 char max Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-06 04:01 +0000
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-05 21:21 -0700
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-06 06:34 -0700
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-06 09:07 -0700
Re: PEP8 79 char max Skip Montanaro <skip@pobox.com> - 2013-09-06 05:09 -0500
Re: PEP8 79 char max Tim Chase <python.list@tim.thechases.com> - 2013-09-06 05:35 -0500
Re: PEP8 79 char max Tim Delaney <timothy.c.delaney@gmail.com> - 2013-09-06 20:47 +1000
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-06 05:24 -0700
Re: PEP8 79 char max Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-09-06 19:22 -0400
Re: PEP8 79 char max Tim Chase <python.list@tim.thechases.com> - 2013-09-06 07:56 -0500
Re: PEP8 79 char max Neil Cerutti <neilc@norwich.edu> - 2013-09-06 13:12 +0000
Re: PEP8 79 char max Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-06 03:40 +0000
Re: PEP8 79 char max Metallicow <metaliobovinus@gmail.com> - 2013-09-05 21:19 -0700
Re: PEP8 79 char max Serhiy Storchaka <storchaka@gmail.com> - 2013-09-07 21:00 +0300
Re: PEP8 79 char max Vito De Tullio <vito.detullio@gmail.com> - 2013-07-30 20:00 +0200
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