A twist on emulation...

[Allison]

The links do not works from here.  I get an operation timed out
error.

Allison
 


>
>Subject: A twist on emulation...
>   From: "Graham Toal" <gtoal at gtoal.com>
>   Date: Mon, 14 May 2007 14:18:26 -0500
>     To: cctech at classiccmp.org
>
>I took a pdp15 compiler and a pdp15 emulator this weekend and
>hacked them together in a way such that the compiler outputs
>what looks like a windows executable that you can simply run
>like a normal DOS (x86 DOS, not the other one) command-line
>program.  The emulator is embedded in the .EXE along with the
>pdp15 code.
>
>It lets you have the experience of writing in an early 1970's
>language for the PDP15 much as if you'd been on the machine
>itself, but without the hassle of managing an emulator.
>
>The language is an early version of Imp, which predates the
>more common Imp77 or Imp80 versions; in fact it is actually
>much closer to the original Atlas Autocode than it is to the
>final versions of Imp.  A significant feature of the language is
>that it allows embedded PDP15 assembly language.
>
>Unfortunately I don't have a document describing the early language,
>though I do have a few example programs you could look at to
>pick it up from.
>
>The windows-ported binary of the compiler is here:
>
>  http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/windows_port/
>
>see the readme.txt for manual installation instructions.
>
>I'll put up the source of the system and some working example imp15
>source files in a day or two.
>
>meanwhile related files are:
>
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/EMULATOR.txt
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/CompilerOutput.htm
>
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/hdcomp-emul.i15.html
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/takeon.i15.html
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/gram.txt
>
>http://history.dcs.ed.ac.uk/archive/languages/imp-pdp15/IMP15SYS.TXT
>
>a trivial hello world program looks like this:
>
>%begin
>  %print %text 'Welcome to the 1970''s!'
>%end %of %programme
>
>save it as hello.i15 and then execute these commands:
>
>imp15 hello
>link15 hello
>hello
>
>Here are some more example programs; they're not likely to compile
>or run, they're just for looking at to learn the language:
>
>http://history.dcs.ed.ac.uk/archive/languages/hal/7502/hal7502.i15
>http://history.dcs.ed.ac.uk/archive/languages/hal/interdata/hal70.i15
>http://history.dcs.ed.ac.uk/archive/os/pdp915/edit15.txt
>http://history.dcs.ed.ac.uk/archive/os/pdp915/decode.txt
>
>The original pdp15 operating system (not needed for this compiler)
>is here:
>http://history.dcs.ed.ac.uk/archive/os/pdp915/
>
>The operating system was basically a run-time environment for
>the Imp compiler.
>
>Graham