Blog

Time for fun with Jet Set Willy

Software
March 7, 2026

Having Fun With Jet Set Willy

Introduction

This article like many others I will be doing, is a recreation, tidy up, etc of articles originally

published in old User Group Magazines. As the quality of these old magazines is quite

poor, I decided to take it upon myself to recreate those articles and present them in an

improved format, with pictorial enhancements and where possible improved content.

This time for a change from the technical articles, I thought I would have some fun with Jet

Set Willy. This article was originally Published in Einstein Monthly News as part of their

Harry the Hacker series of articles.

How to start on any screen

Insert the JSW disk and from DOS type;

LOAD JSW.COM and press ENTER ;note the number of Blocks this will be

used when saving the program

MOS and press ENTER

(Note: the dot in the next few lines is important as it marks the end of the change)

Now type whichever of the following lines you choose and then save the program:-

M 5D22 00. and press ENTER ; This is the OFF LICENCE

M 5D22 02. and press ENTER ; This is UNDER THE MEGATREE

M 5D22 03. and press ENTER ; This is AT THE FOOT OF THE MEGATREE

M 5D22 04. and press ENTER ; This is THE DRIVE

M 5D22 05. and press ENTER ; This is THE SECURITY GUARD

M 5D22 0B. and press ENTER ; This is THE HALL

M 5D22 12. and press ENTER ; This is ON THE ROOF

M 5D22 14. and press ENTER ; This is the BALLROOM EAST

M 5D22 15. and press ENTER ; This is the BALLROOM WEST

M 5D22 16. and press ENTER ; This is THE KITCHENS - MAIN STAIRWAY

M 5D22 17 and press ENTER ; This is THE KITCHEN

M 5D22 18. and press ENTER ; This is the WEST OF THE KITCHEN

M 5D22 19. and press ENTER ; This is the COLD STORE

M 5D22 1B. and press ENTER ; This is THE CHAPEL

M 5D22 1C. and press ENTER ; This is the FIRST LANDING

M 5D22 1D. and press ENTER ; This is THE NIGHTMARE ROOM

M 5D22 1E. and press ENTER ; This is THE BANYAN TREE

M 5D22 1F. and press ENTER ; This is the SWIMMING POOL

M 5D22 21. and press ENTER ; This is THE BATHROOM

M 5D22 22. and press ENTER ; This is the TOP LANDING

M 5D22 23. and press ENTER ; This is the MASTER BEDROOM

M 5D22 29. and press ENTER ; This is THE ATTIC

M 5D22 2A. and press ENTER ; This is UNDER THE ROOF

M 5D22 2D. and press ENTER ; This is UNDER THE DRIVE

M 5D22 2E. and press ENTER ; This is the TREE ROOT

M 5D22 31. and press ENTER ; This is THE WINR CELLAR

M 5D22 33. and press ENTER ; This is the TOOL SHED

M 5D22 34. and press ENTER ; This is the BACK STAIRWAY

M 5D22 35. and press ENTER ; This is the BACK DOOR

M 5D22 36. and press ENTER ; This is the WEST WING

M 5D22 39. and press ENTER ; This is ABOVE THE WEST BEDROOM

M 5D22 3A. and press ENTER ; This is THE BEACH

M 5D22 3B. and press ENTER ; This is THE YACHT

The ones not listed above do not let Willy move or he gets killed straight away.

You can now save the modified program by typing

Y and press ENTER

SAVE nn JSW1.COM and press ENTER ;note the nn should be

replaced with the number

of Blocks noted for saving earlier

You should now have your modified copy of JSW on disc. Load and enjoy.

Happy gaming.

‍

Lee Bendall

I’ve worked in the finance sector since the late 1980s, but my passion for computing began much earlier. I purchased my first home computer in 1982, and from that moment I knew technology was what I truly wanted to pursue. So, when the opportunity arose in the 1990s to transition my career into the Financial IT sector, I seized it with both hands. Throughout my later career, I had the privilege of working on leading-edge IT projects and was eventually invited to become a member of the British Computer Society, earning Chartered Information Technology Professional (CITP) status—a charter I’m proud to still hold today. Despite my professional focus, I never lost my enthusiasm for the home computing scene. Over the years, I’ve owned nearly every major machine released in the UK. It was no surprise, then, that when MAME introduced support for vintage computers (initially through MESS), I jumped right in. Now retired, my love for 1980s and 1990s computers remains as strong as ever. When the opportunity arose to purchase an Einstein TC-01, I couldn’t resist. The seller—Adam Groome—shared a deep passion for keeping the Einstein alive, and his enthusiasm quickly drew me into the community. Today, I’m involved in several Einstein-related projects, including work on the Speculator, TK-02, and Silicon Disk hardware. In addition to these, I founded the Einstein Document Preservation Project, which focuses on high-resolution rescanning, restoration, and enhancement of all Einstein documentation. I’m also engaged in a large-scale initiative to support and preserve the Einstein’s software library.