[Simh] Way out idea for simh

[khandy21yo]

The Kermit protocol isn't very comp,icated, is well documented, and has a lot of testing behind it.
What happens in your protocol with characters that devices between you and the simulator mangle. Modems were a major frustration, now you have all sorts of  effort devices may do funny things with certain   haracters. Send the wrong characters and it could disconnect.
We've been through this before, why not make use of that experience.


Sent from my Galaxy Tab® A-------- Original message --------From: Sampsa Laine <sampsa at mac.com> Date: 04/20/2016  2:35 PM  (GMT-07:00) To: Phil Budne <phil at ultimate.com>, "simh at trailing-edge.com" <Simh at trailing-edge.com> Subject: Re: [Simh] Way out idea for simh 

> On 20 Apr 2016, at 23:25, Phil Budne <phil at ultimate.com> wrote:
> 
> Ken.Cornetet wrote:
>> I guess I need to shout this:
>> ******* KERMIT DOES NOT WORK ON SIMH EMULATED RTE-6/VM ********
> 
> Why not?
> 
>> Kermit does not exist (and probably couldn't feasibly exist) on any earlier versions of RTE.
> 
> Again, why not?
> 
> Having just written a new shell for PDP-7 UNIX (because the original
> could not be found), I can't imagine much other than a lack of
> something resembling a serial console that would prevent _some_
> version/subset of KERMIT (or something similar like X or ZMODEM) from
> being cobbled together.
> 

And since the connection can be assumed to be lossless, the protocol could be really simple, e.g. something like this:

G=Guest, H=Host

Example of a write operation..

G:	WRITE-FILE
H:	ACK
// Now we send the file structure / word size etc
G:	FILE-META-DATA
G:	<file size and a bunch of OS specific stuff that is written to a second file>
H:	ACK
G:	FILE-DATA
G:	<the actual data>
G:	ACK

Done.


_______________________________________________
Simh mailing list
Simh at trailing-edge.com
http://mailman.trailing-edge.com/mailman/listinfo/simh
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20160420/713a03dc/attachment.html>