DL11 configuration for pdp11gui

[Don North]

On 6/26/2016 2:48 PM, Noel Chiappa wrote:
>      > From: Fritz Mueller
>
>      > So far I haven't seen any place in PDP11GUI to set anything other than
>      > port and baud rate
>
> You might have to use native OS tools to do that. On Unix, that will be
> 'stty'; on Windows, you'd have to use native Windows tools to do that; if you
> go to the Device Manager, select your serial port, and click on 'Properties',
> it has a tab ('Port Settings') for that (or, should I say, it used to - not
> sure about the most recent versions, they're making it all smart-phone like
> for brain-dead lusers).
>
>
>      > From: Don North
>
>      > Mostly PDP11GUI does not care, either 7b or 8b.
>
> I'm kind of surprised to hear that; I assumed that PDP11GUI can download
> binaries, and for that, 8-bit is kind of necessary?

PDP11GUI reads papertape files as 8b binary, but on download translates the 
output to console deposit commands, which are just 7b printable ascii; ie 'D 0' 
to send a binary 0x00 to the target system. So no 8b required here.

The PDP11GUI serial driver does binary block transfers as base64 uuencoded 
streams, which are also just plain ascii 7b text:

     ; high speed buffer    access over serial port    0
     ;
     ; Compression:
     ; like uuencode / base64
     ; Each serial char defines 6 bits, char is in range    0x20 ..    0x5f
     ; 8    chars defines 3    words
     ; Char #    :  <.0..> <..1..> <..2..> <.3..> <.4..>    <..5..>    <..6..> 
<.7..>
     ; Char Bits    :  543210 54 3210 5432 10 543210 543210    54 3210    5432 
10    543210
     ; bytes    :  765432 10 7654 3210 76 543210 765432    10 7654    3210 76    
543210
     ; byte #    :  <...0...> <...1...> <...2...> <..3....> <...4...> <...5...>
     ; word #    :  <...msb0....lsb0..> <...msb1....lsb1..> <..msb2.....lsb2..>