[Simh] pdp11 - console input with high bit set

[Johnny Billquist]

Technically, this is not something about simh at all.
However, it is possible to do a workaround inside simh. But unless it is 
already implemented (in which case I would expect there to be some 
command or setting for it), you might need to modify the simh code to 
work around the problem.

But bottom line is that the software you are running are expecting bytes 
received over the serial port to have MARK parity, so you need to ensure 
that you actually send data with MARK parity.

The workaround would be to fake that the data received on the serial 
port have MARK parity by explicitly turning on the high bit on all 
received characters.

   Johnny

On 2020-07-24 19:12, Paul Moore wrote:
> Johnny, I don't know what that means for simh
> 
> Get Outlook for Android <https://aka.ms/ghei36>
> 
> ------------------------------------------------------------------------
> *From:* Johnny Billquist <bqt at softjar.se>
> *Sent:* Friday, July 24, 2020 1:37:27 AM
> *To:* Paul Moore <paulmoore100 at hotmail.com>; Simh at trailing-edge.com 
> <Simh at trailing-edge.com>
> *Subject:* Re: [Simh] pdp11 - console input with high bit set
> You need to have your terminal set to MARK parity.
> 
>     Johnny
> 
> On 2020-07-24 01:56, Paul Moore wrote:
>> I am trying to run an RK11 diagnostic and am stuck.
>> 
>> The diagnostic asks the user how many drives to test and I can get the 
>> input to work
>> 
>> Looking at the code, it is looking for digits and then cr.
>> 
>> But it is actually looking for  #215, which is 0x8d. Which is CR with 
>> the high bit set. (It also looks for #377 del with HB set)
>> 
>> So what happens is that it just keeps reprompting
>> 
>> I don’t see how that character ever gets into the system. I did ‘set tti 
>> 8b’ but it made no difference. I can post the relevant code if needed.
>> 
>> 
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> 
> -- 
> 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