[Info-vax] Hard links on VMS ODS5 disks

[Johnny Billquist]

On 2023-08-23 14:35, Simon Clubley wrote:
> On 2023-08-22, Arne Vajhøj <arne at vajhoej.dk> wrote:
>>
>> VAX + VMS                               Eclipse MV + AOS/VS
>> ---------                               -------------------
>>
>> CISC                                    CISC
>> 32 bit virtual byte addresses           31 bit virtual word addresses
>> 4 GB address space                      4 GB address space
>> 512 byte pages                          2 KB pages
>> 16 bit compatibility mode               16 bit compatibility mode
>> 4 modes:                                8 modes:
>>     K (0) - VMS                             0 - kernel
>>     E (1) - RMS & Rdb                       1 - virtual adress translation
>>     S (2) - DCL                             2 - unused
>>     U (3) - application                     3 - IO buffering & compatibility
>>                                             4 - DG database
>>                                             5 - Oracle database
>>                                             6 - available for large
>> applications
>>                                             7 - applications
>> memory organized:                      memory organized in 512 MB
>> segments one per mode
>>     P0 - heap
>>     P1 - stack
>>     S0 - OS
>>     S1 - unused (early VMS)
>> processes                               processes + threads (called tasks)
>> kernel in Macro-32 or Bliss             kernel in assembler
>> utilities in Macro-32 or Bliss or HLL   utilities in Algol dialect
>>
> 
> Based purely on what you write above, the use of an Algol dialect for
> writing their userland code is a _massive_ win over the DEC approach
> and _far_ superior to the way DEC did things.
> 
> Wish DEC had done the same.

I think when it came to utilities, very little was in Macro-32, and most 
were in Bliss or some other HLL. Can't say that I'd consider everything 
written in some Algol dialect to be a massive win over that.

   Johnny