[Info-vax] how to extract and install content from vms073lp.zip

Paul Sture paul at sture.ch
Tue Apr 3 08:18:55 EDT 2012


On Sun, 01 Apr 2012 17:47:59 +0200, Johnny Billquist wrote:

> Nonsense. VMS with VAX supports much larger disks than the RA92. The
> largest actual, manufactured MSCP disk (which is what RA disks are) is
> the RA73, which is 2 GB, compared to the 1.4GB of the RA92.

But here we are talking about what devices are supported by SimH, not 
what real VAXen supported.
 
> However, MSCP disks really are not tied to any specific size based on
> the name of the disk reported by the disk itself. That is just a silly
> string. However, I suspect that simh will create files of the size of
> the disk, if you specify a disk name. That size is then reported to the
> system when queried, and that size is what is relevant. Note how I say
> "size" here, and not type. MSCP have a function to report the size of
> the disk, and that is all any OS use to figure out the size of the disk.
> And you can (even in simh) set the size to just about anything you care.
> It's in disk blocks, and each block is 512 bytes. I think it's a 64-bit
> number...
> 
> However, VAXen also support SCSI, which have much larger disks than any
> MSCP disk.

According to the SimH document available here:

http://simh.trailing-edge.com/pdf/vax_doc.pdf

the following disks are supported:

o - RLV12/RL01,RL02 Cartridge Disk 
o - RQDX3 MSCP Disk Controllers (RQ, RQB, RQC,RQD)
o - RXV21/RX02 Floppy Disk (RY) 




-- 
Paul Sture



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