[Info-vax] Attn VSI employees: Viable full system Itanium emulator for VMS ?

[Dave Froble]

On 2/20/2022 3:31 PM, Bill Gunshannon wrote:
> On 2/20/22 13:44, Hans Bachner wrote:
>> Arne Vajhøj schrieb am 20.02.2022 um 02:10:
>>> On 2/19/2022 1:05 PM, John Reagan wrote:
>>>> On Friday, February 18, 2022 at 10:36:48 AM UTC-5, Bill Gunshannon wrote:
>>>>> On 2/18/22 09:12, John Dallman wrote:
>>>>>> In article <69d0b812-0d53-42b6... at googlegroups.com>,
>>>>>> xyzz... at gmail.com (John Reagan) wrote:
>>>>>>> On Thursday, February 17, 2022 at 2:28:46 PM UTC-5, Bill Gunshannon
>>>>>>>> I can't understand the interest in HP-UX at all. It's just
>>>>>>>> another proprietary Unix and not really one of the better ones.
>>>>>>> Big endian
>>>>>>
>>>>>> What makes big-endian attractive to end-user organisations?
>>>>>>
>>>>>> John
>>>>> What real difference does endianess make to anyone today?
>>>>>
>>>> <Fortran COMMON blocks enters the chat>
>>>>
>>>> Nobody has used a COMMON block in one place with an integer and in another
>>>> with bytes?  Or a C union or a Pascal variant record?
>>>
>>> I would use EQUIVALENCE and not COMMON for that, but it could be done
>>> with COMMON.
>>
>> EQUIVALENCE is usually used when you need access to both definitions within
>> the same program unit. (Named) COMMON can be used to use different definitions
>> for the same memory area in different program units.
>
> Using different COMMON block definitions for the same COMMON block
> in different parts of the same program is usually considered very
> bad practice and can result in some rather weird and very hard to
> track down problems.
>
> bill
>

Why?

All a COMMON block is, is a piece of memory.  Isn't it possible to want to look 
at it in different ways?

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
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