JSW Central - Resource Centre for ZX Spectrum games based on Manic Miner and Jet Set Willy game engines

Resource centre for ZX Spectrum games
using Manic Miner and Jet Set Willy game engines

V. Jet Set Willy 64 (JSW64)

Games using John Elliott's JSW64 family of game engines for the 128K Spectrum

1. Jet Set Willy 64

Also known as: JSW64

Author: John Elliott

Year: 2005 (Version 0.01 Hacklevel 11)

Latest 'official' revision: 2005 (Version 0.01 Hacklevel 11a)

Latest 'unofficial' revision: 2006 (Version 0.01 Hacklevel 12)

Language: English

The JSW64 game engine was created by John Elliott as a development of the Jet Set Willy 128 idea, using the extra memory of the 128K Spectrums in a different way. Whereas JSW128 can have up to 256 simple rooms, JSW64 can have up to 64 or 128 more sophisticated rooms.

The JSW64 game engine has six variants: V, W, X, Y, Z and [, which differ in the maximum number of rooms, number of guardians per room, number of cell classes per room and whether the cell type of each cell class is set globally or on a room-by-room basis, as shown in the table below:

Variant	Rooms	Guardians per room	Cell classes per room	Free space per room
JSW64 V	128	13	8	64 bytes
JSW64 W	128	8	13*	0 bytes
JSW64 X	64	13**	8	576 bytes
JSW64 Y	64	8**	13*	512 bytes
JSW64 Z	64	8**	13***	256 bytes
JSW64 [	64	4**	16	512 bytes

* There are 13 cell classes defined per room, and three "global" ones which are the same in all rooms.

** The guardian table can be moved into the free space, giving you up to 32 guardians per room.

*** JSW64 Z allows any attribute to be used in a room; so a cell can belong to one of 13 cell classes or behave like one of 240 differently-coloured "water" blocks.

The development of the JSW64 game engine was gradual and related to the development of its companion editor, JSWED. Its consecutive revisions are called "Hacklevels", while "Versions" (v.) refer to the room data.

Jet Set Willy 64 (JSW64) was the first game ever to use the JSW64 game engine. It has the rooms from the original JSW and some additional rooms designed by John Elliott. In variants V and W it also has the rooms from the original MM. According to John Elliott, "as with JSW128, the actual game is just a demonstration of the features of the game engine - the JSW house with a few rooms redefined here and there".

JSW64 Hacklevel 1 was beta-released in April 2004. Beta releases of Hacklevels 7 and 8 followed in the same month, and of Hacklevel 9 - in May 2004.

In February 2005 John Elliott declared JSW64 v. 0.01 Hacklevel 11 to be gamma-released, and in April 2005 he provided an installer to create the game files.

Hacklevel 11a of the JSW64 game engine was introduced in July 2005. It fixed a bug in the DOS installer.

Hacklevel 12 of the JSW64 game engine was introduced in January 2006, with the release of John Elliott's JSWED v. 2.2.9. It added a new cell type: trap cells, and fixed a bug in the memory map.

Since April 2005 John Elliott released the consecutive revisions of the game as installers. He did not release tape or snaphot files of the actual games.

Whenever you load a JSW64 game in JSWED, it automatically upgrades it to the highest Hacklevel.

John Elliott's latest gamma-release (as installer) of JSW64 was v. 0.01 HL 11a. However, as the Hacklevel has been updated since, in fact the highest existing revision of the game is JSW64 v. 0.01 HL 12. It can be created using, first, the latest gamma-released installer and then version 2.29 or higher of JSWED.

Jet Set Willy 64 (JSW64) v. 0.01 HL 12

Variants V and W

Number of edited rooms: 113

Number of items to collect: 180

Spare lives at the start: 7

Completable without loss of life? NO

Lives which need to be sacrificed to complete the game: 1

(A life has to be sacrificed to collect the leftmost item in "Conservatory Roof" [43].)

Starting time: 7:00 am

Best documented completion time with no unnecessary loss of life: 8:37 am

Variants X, Y, Z and [

Number of edited rooms: 64

Number of items to collect: 90

Spare lives at the start: 7

Completable without loss of life? NO

Lives which need to be sacrificed to complete the game: 1

(A life has to be sacrificed to collect the leftmost item in "Conservatory Roof" [43].)

Starting time: 7:00 am

Best documented completion time with no unnecessary loss of life: 7:57 am

Download links

Homepage	The game's homepage on John Elliott's website

Direct game download	Game files of all six variants of the game (v. 0.01 HL 12) in TAP and TZX formats

World of Spectrum	The game's page on WoS

Spectrum Computing	The game's page on Spectrum Computing

Speccy Screenshot Maps	The map of JSW64 W on Speccy Screenshot Maps

JSW Central	RZX walkthroughs of all six variants of the game (v. 0.01 HL 12) showing the best documented completion times

RZX Archive	RZX walkthroughs of all six variants of the game (v. 0.01 HL 12) on the RZX Archive (showing completion times which are inferior to the best publicly available recordings)