CPOC downloads

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• CPOC Binaries
• CPOC Headers
• CPOC Libraries
• CPOC Documentation
• CPOC Source

If you want to use CPOC, then download the appropriate files from the list below. Each file is a ZIP archive of all the files. If unpacking on a PC, then use the PKUNZIP -d option to preserve the directory structure. If you are unpacking the archive directly on the Psion 3a, then refer to the README.TXT file to find out where the unpacked files should be located.

CPOC is available hosted on a number of different environments. Select the one(s) that you are interested in using.

• CPOC for the Psion 3a/3c version 0.93
  This is the README file for CPOC Psion 3a/3c version in a form where you can view it online. It is also included as part of the download below.

• CPOC Psion 3a/3c (version 0.93) 225Kb (15th November 1997)
  This is the base package for the Psion 3a/3c. It is still considered a beta release as it will not be fully useable until the libraries mentioned as the first item in the next section are ready.

  The main limitations are compared to the variants of CPOC hosted on other operating systems are as follows:

  • The maximum size of source file that can be handled is restricted.
  • There is no support for floating point data types at all when generating code.
  These limitations do not apply if you use one of the cross-compliation variants of the CPOC system.

• CPOC Windows 95/NT version 198Kb (6th November 1997)
  This a version of CPOC that runs under Windows 95 or Windows NT in a DOS box, and allows you to develop programs for the Psion 3a/3c/Sienna. You do all the editing and compilation on the Windows system and then download the resulting program to your Psion for testing. Includes CPOC command line front-end, CPOC pre-processor, C86 compiler, AS86 assembler, LD86 linker and AR86 librarian.

• CPOC Linux version 163Kb (4th November 1997)
  This a version of CPOC that runs under Linux, and allows you to develop programs for the Psion 3a/3c/Sienna. You do all the editing and compilation on Linux and then download the resulting program to your Psion for testing. Includes CPOC command line front-end, CPOC pre-processor, C86 compiler, AS86 assembler, LD86 linker, AR86 librarian and the PACKHDR utility.

• CPOC MSDOS version
  This a version of CPOC that runs under MSDOS 5 or MSDOS 6, and allows you to develop programs for the Psion 3a. You do all the editing and compilation on MSDOS (or a DOS box under any WINDOWS 3.1x variant) and then download the resulting program to your Psion for testing.

You will require header files regardless of which version of the CPOC binaries you decided to download. To avoid those who do not need (or have the space for) the non-essential items the header files are split into a number of separate downloads. You should get all those that you are interested in using, but if you get all the Psion specific ones you will find they occupy quite a bit of space once the archives have been unpacked.

The headers are also supplied in two versions - packed and unpacked. The difference is that the packed variants have been processed to remove all comments and unnecessary white space to reduce their size, but has the side-effect of making them no longer easily readable. We therefore recommend that users of the Psion hosted variant of CPOC use the packed variant of the headers except when they specifically want to look at their contents

• CPOC ANSI header files (required by all CPOC variants)
  

  These are the ANSI C header files for use with CPOC, plus some essential Psion specific ones that the ANSI files depend upon. All versions of CPOC will need this package to be able to successfully compile programs that can actually run on the Psion.

  • packed (16kb)
  • unpacked (25kb)

• CPOC PLIB header files (optional) 35Kb (18th March 1997)
  

  These are headers that cover the Psion PLIB library. They are based on the Psion C SDK header files with a few additional lines added for CPOC purposes (those with the C SDK should be able to use them as direct replacements for the C SDK files). Psion have very kindly given permission to use the C SDK headers in this way.

  Please note that the provision of the PLIB header files in this way does not imply that all routines named in the header files are supported. Only a small subset will initially be supported although it is hoped to add to these over time. We would welcome anyone who wants to contribute additional routines for addition to the CPOC LIBPLIB.A library (our implementation of the PLIB routines), and such users should look at the LIBPLIB source available elsewhere on this page.

  • packed (23kb)
  • unpacked (30kb)

• CPOC additional Psion header files (optional) 35Kb (18th March 1997)
  

  These are headers that cover elements of the Psion libraries other than the PLIB library. They are based on the Psion C SDK header files with a few additional lines added for CPOC purposes (those with the C SDK should be able to use them as direct replacements for the C SDK files). Psion have very kindly given permission to use the C SDK headers in this way.

  Please note that the provision of the these header files in this way does not imply that all routines named in the header files are supported. To the contrary, only a very small subset will initially be supported although it is hoped to add to these over time. We would welcome anyone who wants to contribute additional routines for addition to the relevant CPOC libraries and such users should look at the related source available elsewhere on this page.

  • packed (23kb)
  • unpacked (30kb)

You will require libraries regardless of which version of the CPOC binaries you decided to download if you want the ability to do more than syntax check your code. To avoid those who do not need (or have the space for) the non-essential items the header files are split into a number of separate downloads. You should get all those that you are interested in using, but if you get all the Psion specific ones you will find they occupy quite a bit of space once the archives have been unpacked.

• CPOC ANSI library (required by all versions) 45Kb (1st November 1997)
  These libraries are not available as they are unfinished

  We are no longer working on this as we now use Psion 5 systems. We have therefore made the full source available to anyone who might be interested in finishing of this project. We will be willing to help anyone who may wish to complete this project even though we cannot find the time/inclination to do he job ourselves. Feel free to email the authors about what work is outstanding if you are serious about helping complete this projct.

  This is the basic set of libraries that are used to support the ANSI C header files. All versions of CPOC will need this package to be able to successfully build programs that can actually run on the Psion.
  

• CPOC PLIB library 45Kb (1st November 1997)
  These libraries are not available as they are unfinished

  We are no longer working on this as we now use Psion 5 systems. We have therefore made the full source available to anyone who might be interested in finishing of this project. We will be willing to help anyone who may wish to complete this project even though we cannot find the time/inclination to do he job ourselves. Feel free to email the authors about what work is outstanding if you are serious about helping complete this projct.

  This is a version of the LIBPLIB.A library that contains more routines than is contained in that provided with the ANSI library. If you want to use these routines, then this library should replace the file of the same name provide with the ANSI C library above.

The following provides more detailed documentation on specific programs for those who may want to make more advanced use of the relevant program:

• CPOC Compiler phase documentation This a a text version of the detailed documentation for the C86 program that is the compiler phase of the CPOC system. Psion 3a/3c users should note that the UNZIP'ed version of this file is too large to load into the WORD application on the Psion 3a/3c. You must therefore either read it on another machine or use an alternative Psion 3a/3c application to read it. The ELVIS editor supplied as an optional extra for use with CPOC will do the job if needed.

• Psion 3a/3c version: Psion C SDK
• Windows 95/NT version: Microsoft Visual C++ v5.0
• Linux version: GNU C (provided with Linux)

The source files can change quite frequently as we make small changes or updates to the system, so we indicate the date each source file was last changed. You will need an ANSI C compiler on your system to be able to build these. If you find that you need to make any changes to any of the files included in the above source distributions, then please send us the details so that we can incorporate the changes in future releases.

• CPOCLIB support library 46Kb (2nd November 1997)
  This is a special support library that we use when building the Psion 3a/3c hosted variants of the CPOC programs. It is needed if anyone want to rebuild any of the CPOC programs using the Psion supplied C SDK.

  It is basically a library that emulates at a very basic level many of the commonest ANSI C and Unix calls, mapping them onto the Psion PLIB library. This requires significantly less memory than using the Psion CLIB library, albeit without the same level of functionality. The purpose was to allow us to compile and link C programs with the SIBO C SDK without having to use the CLIB library as we could not afford the memory space.

  This library is provided on an "as is" basis and users use it at their own risk. Having said that, it may prove useful to anyone who is trying to port C programs to the Psion 3a/3c from other environments

  Needs Psion SIBO C SDK to be able to compile.
  

• CPOC Front End 100Kb (2nd November 1997)
  This is the source to the CPOC front-end when CPOC is running hosted directly on a Psion 3a (or equivalent) machine. It is written using the Psion OOPS style of programming and needs the tools supplied with the Psion SIBO C SDK.

  Needs Psion SIBO C SDK to be able to compile.

• CPOC Make (Not yet available for download)
  The MAKE program that we use on the Psion 3a/3c hosted version of CPOC. You can also use it in a cross-compilation variant of CPOC if you do not already have a MAKE program (most development environments tend to provide one)..

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC command line front-end 26Kb (27th October 1996)
  This is the front-end program that provides a command line interface that allows you to easily run all the remaining programs given below. Revised to take account of changed parameter syntax to main compiler phase.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC pre-processor 60Kb (1st September 1996)
  This is the Decus Pre-processor that is used on the Psion 3a/3c version of CPOC. If you already have a better pre-processor then feel free to use it. The Decus pre-processor is far from the most powerful one available, but we use it on the 3a hosted variant of CPOC as it is the least demanding on memory that we know off out of those publically available. Where there are less constraints on memory we tend to use the GNU version instead.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• Compiler phase
  This has its own page as it is not specific to CPOC. You need to check it if you want to see when the compiler source available for download was last changed.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC assembler 65Kb (24th August 1996)
  The AS86 assembler. In theory this should be processor independent, but at the moment it does not appear to be working correctly on non-Intel platforms. We have not (yet anyway) been able to track down why.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC linker 32Kb (24th August 1996)
  The LD86 linker that takes the output from the assembler to build the final Psion .IMG program file.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC librarian 4Kb (24th August 1996)
  This is a librarian that allows you to combine a number of object files output by the AS86 assembler into a library suitable for input into the LD86 linker. The current version is very minimal in that the only option supported is to create a new library from object files.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• CPOC Header Pack utility 7Kb (25th October 1997)
  This is the utility that is used to process a header file stripping out all comments and white space. It is typically used when space is at a premium and you need to compress a header file down to its minimum size.

  Needs Psion SIBO C SDK to be able to compile 3a hosted version.

• Test library 12Kb (3rd September 1996)
  This is a small test library to allow you to check out the basic system once you have built all the above programs. It includes a very minimal set of files needed to build a "Hello World" type of program. The intention is that you build this using the versions of the programs you have built from the above sources, and if all the programs are working correctly, the program you build can be downloaded and run on the Psion 3a.

• Assembler Include files 6Kb (3rd September 1996)
  This is the EPOCDEFS.INC file needed to build the Test Library mentioned above. This is also part of the more complete set of include files.

• LIBCLIB Source files 142Kb (25th October 1997)
  This is the source for the CPOC LIBCLIB.A library and associated startup file. LIBCLIB.A is the CPOC equivalent to the Psion CLIB library that supports the ANSI C set of functions. Note that many of the routines in this library call routines in the CPOC LIBPLIB.A library whose source is below.

• LIBPLIB Source files 31Kb (25th October 1997)
  This is the source for the CPOC LIBPLIB.A library. LIBPLIB.A is the CPOC equivalent to the Psion PLIB library that supports access to most of the OS services built into the Psion ROM.

  Many of the assembler routines in this library are auto-generated using a AWK script. You will therefore need AWK (or an equivalent such as GNU GAWK) installed to be able to re-generate these assembler files.

  For those who do not have access to AWK, a copy of the last set of generated assembler files is included in this archive as well as the AWK script from which they were generated.