Chris Elmquist wrote:
Do you have a recipe for converting various non-TU58
images (such as
RL02) to a TU58 image so that it can be put onto the emulator and
then transfered to the target system?
I believe that Allison already answered this question. However, since
VTSERVER
was also specified as part of the answer, there may have been some
confusion.
By itself, the TU-58 is a block addressable device that is identical to
every
hard drive EXCEPT:
(a) The speed is very slow since the data is transmitted over a serial line
(b) The capacity is very small - only 512 blocks.
When used as a DD: device, the TU-58 is presented to the RT-11
operating system not as a serial tape device, but as a disk drive with
a file directory.
There is absolutely no conversion needed to convert an RL02 image
to a TU-58 image other than factors associated with the available
number of blocks on a TU-58 and an RL02 (which has 20450 user
available blocks).
Exactly how this works when a TU-58 emulator is used, I am unable
to say since I have never used the emulator nor do I understand the
exact details. However, if a file of 20450 blocks is set up on the
TU-58 emulator and the changes applied to DD.SYS are made,
then RT-11 should have no difficulty in setting up a bootable
TU-58 emulation.
By the way, what are the changes necessary to DD.SYS to be
able to use 20450 blocks and why are they needed? I suspect
that they allow DUP.SAV to "INIT DD:" at the size of the TU-58
emulation? Am I correct?
Jerome Fine