Anyone know how to patch Thexder for unlimited energy?

[Tyrop]

THere are a number of web pages that show how to patch the EGA version of Thexder for unlimited energy / invulnerability. It is a matter of changing 4 bytes in a hex editor or using debug. I can't find anything for the PCjr version. I tried loading the PCjr version in debug and searching for the same string of bytes, but no matches. The PCjr version has great graphics, and I would like to see the different levels, but it is so hard to play!

[Trixter]

Just in case someone stumbles on this looking for the same thing: The patch to a specific overlay is the wrong way to do it; here's a patch that should work for all versions (follow these directions exactly):

Code: Select all

debug thexder.com
g c28
t
g e3
e cs:e3 2e
t
e cs:f29 90 90
g
w
q

Press CAPS LOCK, begin the game, then press ESC, Y, and ESC again. You should now have full energy stuck on all the time.

Caveat: I have not tested this in many years.