KLH10 (PDP-10 emulator) on the Sharp Zaurus (and iPAQ hx4700)

TOPS-20 running on an SL-C860 Zaurus

This is a port of Ken Harrenstien's KLH10 PDP-10 emulator, to ARM EABI. I compiled it under Angstrom 2007.12-r19 on a Sharp Zaurus SL-C860, and also ran it on an HP/Compaq iPAQ hx4700:

lex@hx4700:~/klh10$ cat /etc/angstrom-version 
Angstrom 2009.X-test-20090526
Built from branch: stable/2009
Revision: ea3ee6d324986ee60435e6bc0673f661f8aed9f9
This may work on other ARM EABI architectures.


Of the patches, I found the gcc-4.1 patch for kn10ops.c on a list and edited cenv.h myself, after getting build errors (the cenv.h #define conflicted with a definition in my system include files). Warning: this may not have been a good thing to do, and I thought that it might affect file operations. So far though, everything's fine and the only issues that I have found were due to my inexperience with the TOPS-20 OS. I used the Panda Distribution and needed to make a few changes to the configuration: disable the idler to stop a hang on bootup. For the hx4700, the NI20 device configuration was straightforward - see the package install.txt document for configuration instructions. Here is my klt20.ini for the hx4700; the klt20.ini for the Zaurus is similar, except that the ni20 IP address and hostnames are different.

Performance? Pretty good. It's not hugely fast on either system, but it is usable and you can't beat the 'street-cred factor' of being able to carry an entire PDP-10 system in your pocket [note to self: not your back pocket].

Here's the error that I needed to apply the cenv.h patch for:

In file included from ../../src/wfio.c:138:
./../src/cenv.h:270:29: warning: missing whitespace after the macro name
In file included from /usr/include/stdio.h:28,
                 from ../../src/wfio.c:140:
/usr/include/features.h:249:34: error: token "=" is not valid in preprocessor expressions
I think that this is caused by the preprocessor substituting a macro, when it shouldn't. Lines 249-251 of /usr/include/features.h are:
#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64                 
# define __USE_FILE_OFFSET64    1                                 
I haven't been able to fix this because I don't know what I'm dealing with (I'm fairly new to C programming). Should that '#<space>define' be replaced with '#define' (i.e. it doesn't like the space?).. (shrug)


DEC PDP-10 Emulation
Panda Programming TOPS-20 Home Page
TOPS-20 Notebook Set
Public-access TWENEX system


-rw-r--r-- 1 lex lex  277563 2011-01-06 03:40 klh10-2.0h-arm.tar.gz

KLH10 source code

-rw-r--r-- 1 lex lex 2486721 2011-01-06 03:35 klh10-2.0h.tar.gz

Edited command history

-rw-r--r-- 1 lex lex    1923 2011-01-05 10:16 history.txt


-rw-r--r-- 1 lex lex     840 2011-01-06 03:30 cenv.h.patch
-rw-r--r-- 1 lex lex     301 2011-01-06 03:31 kn10ops.c.patch


a46508377d1bcf6c7aef6e461cc03b2d  ./dist/klh10-2.0h.tar.gz
6403bfcfbabcf4665236e8168ab4a827  ./dist/klh10-2.0h-arm.tar.gz
46101b21d38031c998c3858b631ba56c  ./history.txt
c803c8757233e0d932fc48b79b31b90c  ./cenv.h.patch
e155f1617649900468f0162c754a0e87  ./kn10ops.c.patch

Never-Asked Questions ('NAQ')

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