[vcf-midatlantic] Found: VMS Hobbyist CDs

[Dave Wade]

The CDs can be ripped an written on a normal drive, so that makes sense.
Dave

On 6 Jun 2017 20:05, "Jonathan Gevaryahu via vcf-midatlantic" <
vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:

> AFAIK OSes which require drives with '512 byte blocks' is sort of a scsi
> hack.
> The physical data on the cd surface is 2048 byte blocks (plus ECC and
> subchannel data you don't normally see for 2532 bytes per sector, plus
> headers and sync marks etc)
> The whole 512 byte thing is a special mode certain cd drives have which
> sends each 2048 byte block to the host computer as if it was four separate
> 512 byte blocks/sectors, but its really just a translation layer. Not all
> drives do it.
>
> The actual CD contents for these VMS cds are 2048 byte blocks, the 512
> byte magic happens in the drive, AFAIK.
>
> I could be wrong about this.
>
> On 6/5/2017 12:48 PM, Brian Schenkenberger via vcf-midatlantic wrote:
>
>> Neil Cherry via vcf-midatlantic writes:
>>
>> On 06/03/2017 11:21 PM, Jim Scheef wrote: > Neil, > Could you pull ISOs
>>> of a couple of the CDs before you take them to IA? > Jim
>>>
>>> I'm using my Linux box to see if I can copy the entire CD to an image. I
>>> don't know how well this will work but it won't take much space.
>>>
>> http://tmesis.net/OpenVMS_Hobbyist/
>>
>>
>>
> --
> Jonathan Gevaryahu
> jgevaryahu at gmail.com
> jgevaryahu at hotmail.com
>
>