Hi guys!
I tested the build version of XRoar, and the game work ok on D32 mode but not on D64 mode, as I guess it should be.
Also tried Zephyr's patch and it also works on my D64.
In the end, the game was correctly preserved, as it does not work on a D64 without patching.
Thanks so much!
Edit:The computerware version works on the D64 right away.
Junior's Revenge by Dragon Data
Re: Junior's Revenge by Dragon Data
xroar -trace ... | egrep '(ST|LD).*\$ff[13][0-9a-f]' reveals:
Those second numbers are the hex values EOR $A5 - which is how it's saved to tape ("copy protection", I guess!). Searching the CAS file and replacing those with the appropriate correct values (and adjusting block checksums) leads to: juniors_revenge_fixed.cas
Seems to work, but I only played it as far as the second level...
Code: Select all
3f09| b7ff07 STA $ff07 125aa2
3f0c| b6ff06 LDA $ff06 135aa3
3fa4| f7ff2a STB $ff2a 525a8f
5792| b7ff2a STA $ff2a 125a8f
583b| f7ff28 STB $ff28 525a8d
Seems to work, but I only played it as far as the second level...
Re: Junior's Revenge by Dragon Data
The attached version uses an updated auto-running version of my patch which also automatically detaches DOS (or any other auto-start cartridge based software) before loading the game. The game code on cassette remains unmodified and is patched only at runtime.
- Attachments
-
- Junior's Revenge (1983)(Dragon Data)[h Zephyr].zip
- (30.72 KiB) Downloaded 356 times
Re: Junior's Revenge by Dragon Data
Oh, neat. Only now watched to see what your patcher does. Cool solution (and usable having the original game, of course).
- snarkhunter
- Posts: 241
- Joined: Fri Apr 03, 2009 7:16 pm
- Location: France
Re: Junior's Revenge by Dragon Data
I could not do so any longer now (and more for practical than technical reasons, actually)... but I used to play the game after purchasing it, back then! This version was rather disappointing (especially after enjoying it on a friend's ColecoVision console), but the cassette version did work fine on my Dragon 32, as far as I can remember.robcfg wrote:Could someone test it on a real Dragon 32? Just to be sure.