Jet Set Willy 2 Cheats

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By Camerone Else

Supporter (8)

Camerone Else's picture

01-11-2013, 04:14

The Spectrum version of JSW2 had a very useful cheat from the point of view of a developer, which used the Cartography room, and I duplicated it in the MSX version. I also added a couple of my own, so that I would be able to prove that every room could be navigated, and every object collected, since there was no way that I could actually successfully play the game all the way through.

Unfortunately, access to the cheat involved pressing multiple keys in a way that emulators appear not to support (it may be a limitation in the Windows keyboard).

If you're running using an emulator like blueMSX that contains a debugger, then you can do the following:

Set it running, and before you start a game (that is, while it's playing the Moonlight Sonata), interrupt it with the debugger. Display a hex dump of ADAF. It contains 28, and the next byte contains 51. Change both to zero (you're changing a conditional branch into a pair of NOP instructions).

Now, when you start the game, the cheats are accessed via three function keys.

F1 displays the Cartography Room, but with a flashing cursor which you can move around using the cursor keys to choose the room you want to put Willy into. Press SPACE to go to that room, and then move the cursor around to choose where Willy will appear in the room. Press SPACE again, and the game continues from there.

F2 toggles single step mode. While in single step mode, the game waits for you to press a number key (note, the key pad keys don't work for this), and advances one step for each press. Note that if you want to make Willy move or jump, you have to be pressing the appropriate key WHILE you press the number key.

F3 toggles infinite lives mode. While in this mode, Willy's count of remaining lives doesn't decrease.

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By ARTRAG

Enlighted (6828)

ARTRAG's picture

01-11-2013, 10:04

Awesome!
I have been asking myself for years if someone has ever been able to complete this game without cheating.

By Manuel

Ascended (18694)

Manuel's picture

01-11-2013, 11:14

Outside of an emulator, what is the way to access the cheat mode? So, which keys to press?

By Camerone Else

Supporter (8)

Camerone Else's picture

01-11-2013, 12:02

Press all four arrow keys and the space bar at the same time. A message should come up telling you to enter a code. The code is: caveman

The game resumes with the cheat F keys enabled.

By kabish

Master (223)

kabish's picture

01-11-2013, 12:29

Thank you very much !!!!

By jltursan

Prophet (2619)

jltursan's picture

01-11-2013, 14:07

Thank you Mr. Else!!

Quote:

since there was no way that I could actually successfully play the game all the way through.

And that proves how hard it was then to beta test a game!. Too much unpaid time is needed!

By mars2000you

Enlighted (6175)

mars2000you's picture

01-11-2013, 15:23

Camerone Else wrote:

If you're running using an emulator like blueMSX that contains a debugger, then you can do the following:

Set it running, and before you start a game (that is, while it's playing the Moonlight Sonata), interrupt it with the debugger. Display a hex dump of ADAF. It contains 28, and the next byte contains 51. Change both to zero (you're changing a conditional branch into a pair of NOP instructions).

Now, when you start the game, the cheats are accessed via three function keys.

You can also use the trainer with the following .mcf file :

!cheats for blueMSX :jetsetwilly2
!(c) 2013 Benoît Delvaux
!thanks to Camerone Else
0,44463,0,0,cheat mode (F1-F2-F3) activated (select in game)
0,44464,0,0,cheat mode (F1-F2-F3) activated (select in game)
0,59442,4,0,never loses a life
0,60155,255,0,lives

By Manuel

Ascended (18694)

Manuel's picture

01-11-2013, 16:48

Heheh, I first had to find a version without the copy protection!

But indeed, I couldn't trigger the cheat mode in openMSX. Either it got to the key definitions menu, or I started the game, or just nothing happened.

By mars2000you

Enlighted (6175)

mars2000you's picture

01-11-2013, 16:56

With the trainer, you must select the 'cheat mode activated' cheat in the game; if you do that on the title screen, you go indeed to the key definitions menu when pressing F1 for example.

By jltursan

Prophet (2619)

jltursan's picture

01-11-2013, 16:58

I need an anti-ghosting keyboard right now... Sad

By meits

Scribe (6491)

meits's picture

01-11-2013, 17:35

I've used several microsoft keyboards of which none had this evil nasty ghosting 'bug'...

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