Questions regarding Tom Shoppa.

From: Carlini, Antonio <Antonio.Carlini_at_riverstonenet.com>
Date: Thu Apr 11 16:27:07 2002

>Why is 212992 magic?

                OK. I'm an idiot :-)

                RT-11 has a limit on disk
                size, and my (poor) recollection
                is that this might be in the
                region of 64K blocks (512 byte
                block ... i.e. 16MB per disk).

                This would be 16384 2048-byte
                sectors. 13*16384=212992.

                So my guess is that when you
                use this RT-11 CD on an RT-11
                system, you tell it to map partition
                13 (and 14 etc. onwards to the end).

                In which case writing an image
                would be a breeze. Create your
                ISO file system as a binary (ISO9660)
                image file and overlay onto an
                image of a full 650MB or 700MB CD.

                Create images of however many
                RT-11 "disks" you think you
                can fit onto the end.

                Determine where the next 16384 2048-byte
                boundary is and drop your first RT-11
                partition there, then keep overlaying
                further partitions until the end.

                OK. I don't know how to do this
                on Windows 98 with the available
                tools, so you'll either have to
                do it on Unix (or OpenVMS)
                or knock up a quick
                tool in C for Windows.

                Or you could ask Tim how he did
                it (but I bet W98 was *not*
                part of the answer!).

                Antonio
Received on Thu Apr 11 2002 - 16:27:07 BST