23 Mar
2023
23 Mar
'23
10:09 a.m.
For my LSI-11 simulator I developed an as accurate as possible
implementation of the Console-ODT functionality as described in the "LSI11
PDP11/03 Processor Handbook" and the "Microcomputer and Memories
Handbook".
As might be expected from these handbooks, the description of the ODT
functionality is not a complete specification and consequently during the
development several questions arose on the reaction of ODT on the user
input, such as:
- What is the reaction on commands like "R0/<CR>RS/4@"? Will the last
opened
location be opened or the contents of the last opened location?
- What is the reaction on a RUBOUT at the prompt?
- What will be the value of the opened location when e.g. three digits are
entered and these three digits are then rubbed out and the location is
closed? Will the value of the last opened location be unchanged or will it
be zero?
- An address and a GO command can be separated by a semicolon. What is the
reaction if characters other than the "G" are typed after the semicolon?
- Etc., etc...
Is there someone in (the vicinity of) the Netherlands with a functioning
LSI-11 who would allow me to try out these commands or could anyone point me
to someone who could facilitate that?
I developed a complete test script for all LSI-11 ODT commands and "all"
relevant situations and ideally I would like to carry out this test script
to get a complete specification of the Console-ODT functionality.
Regards,
Jos
23 Mar
23 Mar
10:33 a.m.
I don't have such a system, but my starting assumption would be that micro-ODT in
general matches the behavior of standard ODT -- which is documented in various software
manuals.
Among other things, in ODT rubout isn't a character erase but a full cancel of the
command. So if you type 3 digits then rubout, whatever was underway is canceled and
you're back at the prompt.
paul
On Mar 23, 2023, at 10:09 AM, jos.fries--- via cctalk
<cctalk(a)classiccmp.org> wrote:
For my LSI-11 simulator I developed an as accurate as possible
implementation of the Console-ODT functionality as described in the "LSI11
PDP11/03 Processor Handbook" and the "Microcomputer and Memories
Handbook".
As might be expected from these handbooks, the description of the ODT
functionality is not a complete specification and consequently during the
development several questions arose on the reaction of ODT on the user
input, such as:
- What is the reaction on commands like "R0/<CR>RS/4@"? Will the last
opened
location be opened or the contents of the last opened location?
- What is the reaction on a RUBOUT at the prompt?
- What will be the value of the opened location when e.g. three digits are
entered and these three digits are then rubbed out and the location is
closed? Will the value of the last opened location be unchanged or will it
be zero?
- An address and a GO command can be separated by a semicolon. What is the
reaction if characters other than the "G" are typed after the semicolon?
- Etc., etc...
Is there someone in (the vicinity of) the Netherlands with a functioning
LSI-11 who would allow me to try out these commands or could anyone point me
to someone who could facilitate that?
I developed a complete test script for all LSI-11 ODT commands and "all"
relevant situations and ideally I would like to carry out this test script
to get a complete specification of the Console-ODT functionality.
Regards,
Jos
10:54 a.m.
The detail of each monitor (11/03, 11/23+, KXT-11) differs, and the LSI-11/03 was an early
design.
However, some monitor source code is available and will provide definitive answers; see
e.g.
-
http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1121/EK-KXTCA-HR-001_KXT11…
- http://bitsavers.trailing-edge.com/pdf/dec/pdp11/t11/
Also, some bootloaders (M9312 is a good exemplar) and ODT provide similar behaviour; see
e.g.
- https://gunkies.org/wiki/M9312_ROM
- https://ak6dn.github.io/PDP-11/M9312/
- https://en.wikipedia.org/wiki/On-line_Debugging_Tool
-
http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-XPTSA-A-D…
- http://www.vaxhaven.com/Paper_Tape_Archive esp DEC-11-UODPA-A-PB.ptap
In each case it's a matter of reading the listings, source or binary code - or the
documentation.
Martin
-----Original Message-----
From: jos.fries--- via cctalk [mailto:cctalk@classiccmp.org]
Sent: 23 March 2023 14:10
To: cctalk(a)classiccmp.org
Cc: jos.fries(a)kpnmail.nl
Subject: [cctalk] LSI-11 Console-ODT
For my LSI-11 simulator I developed an as accurate as possible implementation of the
Console-ODT functionality as described in the "LSI11
PDP11/03 Processor Handbook" and the "Microcomputer and Memories
Handbook".
As might be expected from these handbooks, the description of the ODT functionality is not
a complete specification and consequently during the development several questions arose
on the reaction of ODT on the user input, such as:
- What is the reaction on commands like "R0/<CR>RS/4@"? Will the last
opened location be opened or the contents of the last opened location?
- What is the reaction on a RUBOUT at the prompt?
- What will be the value of the opened location when e.g. three digits are entered and
these three digits are then rubbed out and the location is closed? Will the value of the
last opened location be unchanged or will it be zero?
- An address and a GO command can be separated by a semicolon. What is the reaction if
characters other than the "G" are typed after the semicolon?
- Etc., etc...
Is there someone in (the vicinity of) the Netherlands with a functioning
LSI-11 who would allow me to try out these commands or could anyone point me to someone
who could facilitate that?
I developed a complete test script for all LSI-11 ODT commands and "all"
relevant situations and ideally I would like to carry out this test script to get a
complete specification of the Console-ODT functionality.
Regards,
Jos
12:20 p.m.
I have an 11/03 and could do a screen share and run your script. Contact me
off-list or on the ccmp discord.
-Eric
On Thu, Mar 23, 2023 at 9:21 AM jos.fries--- via cctalk <
cctalk(a)classiccmp.org> wrote:
For my LSI-11 simulator I developed an as accurate as
possible
implementation of the Console-ODT functionality as described in the "LSI11
PDP11/03 Processor Handbook" and the "Microcomputer and Memories
Handbook".
As might be expected from these handbooks, the description of the ODT
functionality is not a complete specification and consequently during the
development several questions arose on the reaction of ODT on the user
input, such as:
- What is the reaction on commands like "R0/<CR>RS/4@"? Will the last
opened
location be opened or the contents of the last opened location?
- What is the reaction on a RUBOUT at the prompt?
- What will be the value of the opened location when e.g. three digits are
entered and these three digits are then rubbed out and the location is
closed? Will the value of the last opened location be unchanged or will it
be zero?
- An address and a GO command can be separated by a semicolon. What is the
reaction if characters other than the "G" are typed after the semicolon?
- Etc., etc...
Is there someone in (the vicinity of) the Netherlands with a functioning
LSI-11 who would allow me to try out these commands or could anyone point
me
to someone who could facilitate that?
I developed a complete test script for all LSI-11 ODT commands and "all"
relevant situations and ideally I would like to carry out this test script
to get a complete specification of the Console-ODT functionality.
Regards,
Jos
12:22 p.m.
I'm nowhere near you, but if you wish, I can set it up so that you can TELNET to my
LSI-11 and use its ODT.
470
days inactive
470
days old
4 comments
5 participants
participants (5)
-
Daniel Daigle -
Eric Moore -
jos.fries＠kpnmail.nl -
Martin Bishop -
Paul Koning