RWAP Services is run by Rich Mellor, who has been involved with computers since acquiring a Sinclair ZX81 in 1982 (the first mass home computer designed by the well-known British inventor, Sir Clive Sinclair).  An adept programmer, with the ability to program in BASIC, machine code, C, HTML, Perl, MS-Access, SQL, and Ladder (PLC-5, SLC-500 and RSLogix), Rich Mellor has achieved some recognition in connection with the Sinclair QL, as a computer journalist, author and commercial programmer/tester. This ability has been put to good use to develop innovative software for the Sinclair QL and for the internet, including perl guestbooks and visitor counters, all based around modular coding techniques.

Since 1988, RWAP Services have been testing commercial software prior to release, often re-writing sections of code on behalf of the authors, in order to overcome bugs.  Unlike many other software testers, RWAP Services' broad base in programming skills allows us to identify the possible causes of program errors and where incompatibilities may be software or hardware based.  As an ex-solicitor, Rich Mellor's attention to detail is legendary and he is famed for producing in-depth, easy to understand, reports of programs which describe problems in detail and often contain suggested bug-fixes and improvements.

An example is when Rich Mellor joined Data Solutions as a technical author in 1998.  Within a week, he was sent to assist with producing documentation for the prestigious Heathrow Terminal 3 Transfer Baggage Facility.  Within two weeks, Rich  had gained sufficient insight into the PLC-5 ladder language to enable him to assist with commissioning the control software and to prepare in-depth reference tables for the MMI (SCADA) programmer.  Later, Rich was given the task of amending the software for Phase III of the project, carrying out all steps up to and including the Factory Acceptance Test, such that the software was installed and ready for commissioning after only one night on site.

Following his success on the Heathrow project, Rich was asked to look at some problematic SLC-500 code for controlling water treatment plants.  It was explained that on some specific dates, the software failed to carry out all of its intended functions, but two software engineers had been unable to identify the problem in the software.  Within one day of being allocated the project, Rich Mellor had identified the problem and its solution, providing a full report to the original software author which enabled him to implement the solution across several existing operational sites.

In the past few years, we have specialised in developing online auction website solutions plus products specifically designed to keep retro computers and older equipment functional.  We also work in conjunction with Michael Jackson Controls Limited to provide additional PLC and SCADA service support.

For more details about our approach, please visit our Privacy and Security Statement and our Environmental Policy.

If you know of any commercial projects which would benefit from our depth of experience, please do contact us.


1982 - Acquired first computer

1986 - RWAP Services launched - providing review, bug-testing and programming services to the burgeoning home computer market.

1988 - Created licensed re-releases of several games for the Sinclair QL home computer, which fixed the bugs and improved the original code.

1996 - Co-authored 1000+ page manual for Sinclair SuperBASIC techniques (an object orientated language)

1998 - First PLC-5 project -  Heathrow Terminal 3 Transfer Baggage Facility

1998 - Launched first website for RWAP Software

1999 - First SLC-500 project - Water Treatment Works (tertiary filters)

2000 - Launched initial range of replacement keyboard membranes for 1980s computers

2001 - Launched Perl based guestbooks and visitor counters

2002 - Launched Perl based search robots

2008 - Launched the SinclairZXWorld forums

2010 - Instrumental in bringing the ZXPand SD card interface to market.

2010 - Launched the Sinclair QL Wiki

2010 - Launch of the Enuuk forums

2011 - Launched SellMyRetro - based on the Enuuk PHP Auction platform

2013 - Provided Modules and coding for various third party Enuuk PHP Auction platforms

2018 - First SCADA project - paint shop for a major automotive manufacturer

2018 - Launch of the Retro-Printer device to capture output from Centronics ports

2019 - First RSLogix project - a linear motor based production line

2019 - Launch of the Interceptor module for capturing in-line USB data

2020 - 10,000th customer