Converting C for KCC on TOPS20

Warner Losh imp at
Tue Dec 10 18:48:56 CST 2019

any chance you can post-process the .obj files?


On Tue, Dec 10, 2019 at 5:26 PM David Griffith via cctalk <
cctalk at> wrote:

> I'm trying to convert some C code[1] so it'll compile on TOPS20 with KCC.
> KCC is mostly ANSI compliant, but it needs to use the TOPS20 linker, which
> has a limit of six case-insentive characters.  Adam Thornton wrote a Perl
> script[2] that successfully does this for Frotz 2.32.  The Frotz codebase
> has evolved past what was done there and so 2.50 no longer works with
> Adam's script.  So I've been expanding that script into something of my
> own, which I call "snavig"[3].  It seems to be gradually working more and
> more, but I fear the problem is starting to rapidly diverge because it
> still doesn't yield compilable code even on Unix.  Does anyone here have
> any knowledge of existing tools or techniques to do what I'm trying to do?
> This is part of a project to get Infocom and other Z-machine games running
> once again on PDP10 mainframes, either real or emulated.  First up is to
> get the bare minimum of a current Z-machine emulator running on TOPS20.
> Then we can work on screen-handling, a disk pager[4], and porting to other
> PDP10 operating systems.  I'm hoping that this will lead to fun exhibits
> wherever PDP10s are displayed in museum or faire settings.
> [1]
> [2]
> [3] Change an objects shape.
> [4] Infocom's Z-machine emulators paged zcode from disk, but Frotz simply
> sucks the whole zcode file into memory.
> --
> David Griffith
> dave at
> A: Because it fouls the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
> A: Top-posting.
> Q: What is the most annoying thing in e-mail?

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