22 May
2011
22 May
'11
8:50 p.m.
Is VTSERVER a TU58 emulator? I've never actually personally used it.
But yes, an RT-11 build for the TU58 uses the DD.SYS driver. Though,
building it for an oversize TU58 image is the same, just with the
modified driver replacing the "plain, vanilla" DD.SYS. (You can get
the modified driver onto a disk image on your PC via PUTR. You can
even skip using an emulator altogether and just build images in PUTR.)
I've used PDP-11 sims for a while, mostly because I've only *JUST* got
my hands on a real PDP-11 (11/23 w/256KB RAM, DLVJ-1, and RQDX3);
though I'm relying on the oversized TU58 images as my disk media as I
have no real disks unfortunately. (So the RL02 sized TU58 images,
though slightly slow, provide me an actual usable RT-11 environment
(I've DECUS C and the RT-11 BASIC on my system "tape" while the second
TU58 is my data "tape").) I'm also negotiating for a VT-103 as well.
On 22 May 2011 09:06, allison <ajp166 at verizon.net> wrote:
On 05/21/2011 06:57 PM, Chris Elmquist wrote:
On Saturday (05/21/2011 at 03:18PM -0400), Christian Gauger-Cosgrove
wrote:
Simple with an emulator running said disk images you have the tools
and source files to build a tape image.
NOTE: Vtserver aka tu58 emulator was simply a block addressable device on
the end of a serial line that did everything a disk could do.. just slower.
That is very important as all other tapes are used and handled very
different from TU58.
So with that a Rt11 build for TU58 is exactly the same as RL02 or RX02
save for the DD driver is used instead.
I've never spent much time on sims for PDP11s as I have the real thing
and many of them.
Allison
Yes, it was a typo, thanks for pointing out the obviousness (and my
forgetting to manually proofread that part of the message).
I just didn't want someone not as familiar with the OS to struggle with
a command that would definitely not work as intended.
Still, the point remains, it seems a bit easier
then VTSERVER to just
do it via a TU58 emulator, especially if VTSERVER ignores the bad
blocks on the real media.
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?
Many of the images floating around are RL02, RX33, or other kinds of
rotating media/disk images and not tape images. ?What is the right
way to turn them into tape images for such an emulator?
Thanks.
Chris