28 Apr
2015
28 Apr
'15
8:55 p.m.
On 2015-04-28 20:10, Mark Matlock wrote:
The BP2 tape is not a BRU tape. Had it been, I already have a fix.
It's a plain DOS tape. DOS tapes are extremely stupid. Basically,
anything goes. There is nothing telling you if the data comes out right
or not. It's essentially implied just by being able to read the block.
(. Why would you ever get blocks in a different order than written? .)
I will need to look for your updated DECUS C on the Update ftp. Part of the challenge
from the DECUS tapes is determining if you have the latest version of a particular
software. Thanks for bringing your version of C to my attention.
No worries. My fixes included making it all work correctly in I/D space,
and then I did a half-hearted attempt at adding a void datatype.
Plenty of work to do... So little time. :-)
Anyway, it's great that people find TCP/IP useful...
I think the FTP code is good enough to be left for a while now. Next for
proper telnet both in and out...
Johnny
On Apr 27, 2015, at 5:31 PM, Johnny Billquist
<bqt at softjar.se> wrote:
The process to see if you got the right combination of blocks is the key to whether an
automated process could be used. I guess you would have BRU try to read a virtual tape and
produce a listing, but the listing could be correct, but still have some blocks out of
order in some small file stored on the tape. On 2015-04-28 02:15, Mark Matlock wrote:
BP2 with I/D space would be worth some effort to bring back from extinction. With the
high speed of Simh and E11 with modern CPUs, if one could figure out a way to reassemble
the tape blocks in the various combinations the see if BRU could read it successfully or
not in some automated way, then just let the CPU have at it. It can't be worse than
breaking the Enigma code in World War II.
A few thousand blocks. The number of permutations can be interesting... Also, it is not
totally trivial to see if you got it all right... Also, I meant to say that the PDP-11 C V1.2 is
corrupt but the V1.1 is okay as I recall. Also, DECUS C works quite well, but I don't
recall which DECUS tape it is on.
I did some changes/improvements to DECUS C many years ago. I believe my changed version
should be available with ftp from Update. I should
probably make a kit disk or something available from MIM/Madame as well. If I only had
time...
Too bad noone is willing to pay for me doing this kind of work. I could spend full time
just fixing things for years... :-)
That is too bad. There are a number of things in RSX that I'm sure you could
improve. I really do appreciate what you've done on TCP/IP. Thanks!
Mark
> Johnny
>
>>
>> Mark
>>
>>>> On Apr 27, 2015, at 4:02 PM, Johnny Billquist <bqt at softjar.se>
wrote:
>>>>
>>>> On 2015-04-28 00:48, Mark Matlock wrote:
>>>> Dave,
>>>> If you are using the RSX11M+ V4.6 distribution tape, there is a copy
of F77 (V5.4 I think) on it already. Look in [246,246]. Also, that tape has DECnet on it
as well that works fine with Johnny's TCP/IP software.
>>>
>>> Cool. Did the person setting that up also include the layered product patches
that are included with RSX?
>>>
>>>> Unfortunately, the DECnet on that tape is for non routing nodes, so
that complicates direct connection to HECnet. I have not found a RSX11M+ V4.6 routing
DECNet distribution.
>>>
>>> It don't really complicate any connection to HECnet. You do not need a
routing node for that, and unless you have some very specific needs, routing nodes just
means it requires way more CPU and memory usage.
>>>
>>>> You are right on BP2 V2.7 being corrupted. The V2.5 is good though.
On the PDP-11 the latest one is corrupt but the earliest one is ok.
>>>
>>> V2.7 have some improvements that would be really nice to have, such as split
I/D space capability...
>>>
>>> I have been trying to repair the tape on trailing edge, but there is a big
library file in there which is just way complicated to figure out...
>>>
>>> Johnny
>>>
>>>>
>>>> Mark
>>>>
>>>>> On Apr 27, 2015, at 3:22 PM, Dave McGuire <mcguire at
neurotica.com> wrote:
>>>>>
>>>>> On 04/27/2015 06:04 PM, Johnny Billquist wrote:
>>>>>>> Uh-oh...That "HDR1" business looks like part of
an ANSI tape label,
>>>>>>> not a filename. What do you think?
>>>>>>
>>>>>> Definitely a corrupted tape.
>>>>>
>>>>> Yup...After testing several other images from the trailing-edge
>>>>> archive, I'm finding the same sort of mess. I knew the BP2 v2.7
image
>>>>> was trashed, but it looks like quite a few others are as well. The
>>>>> f77_v5_4.tpc one is corrupt too.
>>>>>
>>>>> What a mess.
>>>>>
>>>>> Thanks for your help in diagnosing this.
>>>>>
>>>>> At least some earlier releases are intact, but do you know if any
of
>>>>> those newer ones have been archived intact anywhere? Do you have
them?
>>>>>
>>>>> -Dave
>>>>>
>>>>> --
>>>>> Dave McGuire, AK4HZ
>>>>> New Kensington, PA
>>>
>>>
>>> --
>>> Johnny Billquist || "I'm on a bus
>>> || on a psychedelic trip
>>> email: bqt at softjar.se || Reading murder books
>>> pdp is alive! || tryin' to stay hip" - B. Idol
>
>
> --
> Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
> email: bqt at softjar.se || Reading murder books
> pdp is alive! || tryin' to stay hip" - B. Idol