Jet Set Willy cycle randomiser - mod idea

[IRF]

You could even, as soon as Willy reaches the bed, turn off the Main Loop's CALL to the Draw the Guardians routine permanently, meaning that if the player restarted a new game after toilet-time, they could explore the mansion without any guardians (or ropes/arrows).

[Spider]

That's the way I was thinking (without looking at the code) just not call the code that draws it all (rope/guardians/arrows) I do wonder what would happen if a rope was in the bathroom or top landing however but that is off topic, assuming it was still displayed.

[Norman Sword]

Technical problem of turning off the sprites.

Turning of the sprites turns off the ropes.

The consequence of having no ropes are what happens to rooms that at present have ropes.
1) the beach can no longer be traversed. This stops access to the Yacht and the Bow.
2)On the roof can not be traversed. This stops access to Up on batt/We must per/ Watch Tower/I'm sure /on top of the house.

 

Edited March 26, 2021 by Norman Sword

[IRF]

And Esmeralda.

In the context that I suggested a wander round the guardian-free mansion (i.e. post-toilet run), Willy is much too hungover to be swinging around on ropes though.

[Norman Sword]

The simplest modification I can come up with is just add a 3 byte modification such as:-

In decimal

37314    LD A,(IX+0)    Pick up the first byte of the current entity's buffer
37317    CP 255    Have we already dealt with every entity?
37319    RET Z    Return if so
37320    AND 7    Keep only bits 0-2 (which determine the type of entity)
37322    JP Z,37811    Jump to consider the next entity buffer if this one is not being used
37325    CP 3    Is this a rope?
37327    JP Z,37540    Jump if so
37330    CP 4    Is this an arrow?    <<<<<<<<<<<<<<<  mod to JP 37811
37332    JR Z,37431    Jump if so

In hex

91C2    LD A,(IX+$00)    Pick up the first byte of the current entity's buffer
91C5    CP $FF    Have we already dealt with every entity?
91C7    RET Z    Return if so
91C8    AND $07    Keep only bits 0-2 (which determine the type of entity)
91CA    JP Z,$93B3    Jump to consider the next entity buffer if this one is not being used
91CD    CP $03    Is this a rope?
91CF    JP Z,$92A4    Jump if so
91D2    CP $04    Is this an arrow? <<<<<<<<<<<<<<<  mod to JP $93B3
91D4    JR Z,$9237    Jump if so

 

This kills all the sprites but leaves the ropes alone. So you can wander ALL the rooms including Esmeralda
 

Edited March 31, 2021 by Norman Sword

[IRF]

Good spot.

The way the test for ropes comes first in the routine, it's almost as if Matthew had this cheat in mind!

Edited March 27, 2021 by IRF

[Spider]

On 3/26/2021 at 11:25 PM, IRF said:

Esmeralda

She's never really been that much of a concern though even in the standard game ? 🙂