Norman Sword Posted February 9, 2022 Report Share Posted February 9, 2022 Whilst it is possible to run MM and return to basic it is not as simple as a few pokes. JianYang 1 Quote Link to comment Share on other sites More sharing options...
Norman Sword Posted February 9, 2022 Report Share Posted February 9, 2022 Clarification on those pokes The POKE to set the starting room to Room r is 34795,r. (is for JSW) POKE 33824,r is a useful runtime POKE to teleport to Room r. (is for JSW) Spider, JianYang and jetsetdanny 2 1 Quote Link to comment Share on other sites More sharing options...
JianYang Posted February 9, 2022 Report Share Posted February 9, 2022 Thank you, @Norman Sword I have since posting looked at the disassembly and as soon as I've seen that MM moves the stack pointer I realised it wouldn't be that easy. I have resorted to simulating the guardian movement in Basic and hoping that my observations will hold up in the real game. jetsetdanny 1 Quote Link to comment Share on other sites More sharing options...
Spider Posted February 10, 2022 Author Report Share Posted February 10, 2022 JSW has code built in to return to Basic however it does a soft-reset almost because the lower end of the memory is used by the game itself. MM would be similar, I've not checked if it can be implemented into it or not. In JSW (iirc) when you invoke this it effectively returns you to the copyright message but with the 'game core' intact. Its not terribly safe to change the cavern ID while playing, it lives at 33799 (for both the SP and BB version) , odd things can happen. You could change it during the 'end of cavern' code while the remaining air bonus is being added I guess or change it and immediately lose a life. I've not really experimented with this that much. Its easy to set a starting cavern permanently if required , is this what you need ? If memory serves, with the HighScoreChallenge game I altered the starting initialisation code around a bit allowing me to insert a cavern ID there, instead of it being assumed to be zero. Also you could NOP out the INC A instruction at 36918 (SP version) or 36907 (BB version) to keep playing the same cavern again after completion. JianYang and jetsetdanny 2 Quote Link to comment Share on other sites More sharing options...
Norman Sword Posted February 10, 2022 Report Share Posted February 10, 2022 I will again state. It is possible to run Manic miner and return to basic. On returning to basic it will still be possible to poke the game and again enter MM ( and if needed keep on repeating the loop of running the game and returning to basic). All the basic that was in memory before running MM will still be there. Because certain members on here do not have the skill needed to do this does not preclude others from doing so. (e.g. I can if I wanted, do the modifications needed. But I have no intention of doing so. ) in the 30+ years since MM was written I have had no need to do so, and I still have no need to do so. Spider and JianYang 1 1 Quote Link to comment Share on other sites More sharing options...
JianYang Posted February 11, 2022 Report Share Posted February 11, 2022 28 minutes ago, Norman Sword said: All the basic that was in memory before running MM will still be there. Does your idea involve a Spectrum 128K? If not I would be really interested to read your plan how to preserve the Basic. According to skoolkit's memory map Manic Miner overwrites addresses as low as 23552. jetsetdanny 1 Quote Link to comment Share on other sites More sharing options...
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