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| [10 earlier articles] |
| Re: Fat references cr88192@hotmail.com (BGB / cr88192) (2010-01-01) |
| Re: Fat references cr88192@hotmail.com (BGB / cr88192) (2010-01-01) |
| Re: Fat references anton@mips.complang.tuwien.ac.at (2010-01-02) |
| Re: Fat references gah@ugcs.caltech.edu (glen herrmannsfeldt) (2010-01-02) |
| Re: Fat references bobduff@shell01.TheWorld.com (Robert A Duff) (2010-01-02) |
| Re: Fat references jon@ffconsultancy.com (Jon Harrop) (2010-01-03) |
| Re: Fat references DrDiettrich1@aol.com (Hans-Peter Diettrich) (2010-01-03) |
| Re: Fat references bear@sonic.net (Ray) (2010-01-03) |
| Re: Fat references anton@mips.complang.tuwien.ac.at (2010-01-03) |
| Re: 36 vs 32 bit architecture, was Fat references gah@ugcs.caltech.edu (glen herrmannsfeldt) (2010-01-03) |
| Re: Fat references gah@ugcs.caltech.edu (glen herrmannsfeldt) (2010-01-03) |
| Re: Fat references jon@ffconsultancy.com (Jon Harrop) (2010-01-04) |
| Re: Fat references kkylheku@gmail.com (Kaz Kylheku) (2010-01-04) |
| [13 later articles] |
| From: | Hans-Peter Diettrich <DrDiettrich1@aol.com> |
| Newsgroups: | comp.compilers |
| Date: | Sun, 03 Jan 2010 04:30:47 +0100 |
| Organization: | Compilers Central |
| References: | 09-12-045 09-12-055 10-01-003 10-01-008 |
| Keywords: | architecture, history, comment |
| Posted-Date: | 03 Jan 2010 14:44:09 EST |
Anton Ertl schrieb:
>>> You must be using ``quad word'' differently from the rest of the world,
>>> where it is understood to be 64 bits, according to this convention:
>>> 16 bits: word
>>> 32 bits: double word
>>> 64 bits: quad word
>> That is VAX. Everyone else uses 32 bits for a word.
>
> No, that's the 8008 and its successors. For the PDP-11 and its
> successors (including the VAX) the 32-bit units were called longwords.
Just the DEC machines had very different byte and word sizes, as had
many other machines predating the era of 8 bit bytes. IMO no special
size should be associated with a "word" in general, it's a machine
specific definition. AFAIR our TR-440 had a memory of 128K words of 52 bits.
DoDi
[Early DEC machines had 18, 12, and 36 bit words, but once the PDP-11
became a success in the early 1970s, byte sizes other than 8 and word
sizes other than 16 and 32 soon withered away. -John]
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