BBC Micro Game Cheats

One of my interests as a teenager was hacking games to make them easier. I recently came across some notes I made on some of the cheats that I found.300px-bbc_micro.jpeg

I appologise for any errors in the information below. The cheats have been extracted from scrawled notes I made back in the 80s, and not tested recently.

Mr Wimpy

The number of lives is set here:

&5DC9: LDA #&04
&59CB: STA &630

The number of lives is decreased here:

&4442: DEC &630

Jet Pack

The start address for running the code is:

&5900

The number of lives is set here:

&307A: LDA #5
&307C: STA &88

The number of baddies on screen 2 is set here:

&344B : LDA #5

Castle Quest

The start address for running the code is:

&4340

The number of lives is set here:

&5996: LDA #?
&5998: STA &46

The number of lives is decreased here:

&58E9: DEC &46 (or is this &58ED)?

To eliminate all monsters from the game, remove the JSR and destination address from:

&4523: JSR xxxx

and replace with:

&4523: NOP NOP NOP

Planetoid

The start address for running the code is:

&1100

The initial number of lives / smart bombs is set here:

&276A: LDA #3 (Note: this value may be BCD).

Jest Set Willy (?)

Partial disassembly:

&5573: LDA #&68 - Initial Y coordinate
&5575: STA &A24
&5578: LDA #&A8 - Initial X coordinate
&557A: STA &A1B
&557D: LDA #&12 - Initial room
&557F: STA &55

Demon Decorator

To list the code:

*LOAD at &0E00

RENUMBER and remove lines 20, 100, 330, 850, 1310, 50

Cybertron Mission

For infinite lives:

  1. Load part 1
  2. Find the line that starts “*RUN…” and change to “*LOAD…”.
  3. Run the program.
  4. Whern part 2 has loaded, type ?&261E = &EA<Return>
  5. Call &4F80
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: