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| Bootstrap: Load T=0,S=0 at $800. | ||
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| RAM State: | ||
| ========== | ||
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| $0900 | ||
| $0800 BOOT.S stage1 | ||
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| BOOT.S must load RWTS18 (and maybe other things) in the RAM. | ||
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| Track 0: | ||
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| Sector 0d => $0900 | ||
| Sector 0e => $3000 | ||
| Sector 0c => $3100 | ||
| Sector 0a => $3200 | ||
| Sector 08 => $3300 | ||
| Sector 06 => $3400 | ||
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| RAM State: | ||
| ========== | ||
| $3400 Sector 06 | ||
| $3300 Sector 08 | ||
| $3200 Sector 0a | ||
| $3100 Sector 0c | ||
| $3000 Sector 0e | ||
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| $0900 Sector 0d | ||
| $0800 BOOT.S stage1 | ||
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| Then jmp $900, where BOOT.S stage2 is. | ||
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| RAM State: | ||
| ========== | ||
| $3400 Sector 06 | ||
| $3300 Sector 08 | ||
| $3200 Sector 0a | ||
| $3100 Sector 0c | ||
| $3000 Sector 0e | ||
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| $0900 BOOT.S stage2 | ||
| $0800 BOOT.S stage1 | ||
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| Stage2: | ||
| - checks for 128K Memory. | ||
| - Transfer rwts18 from $3000 to $d000 | ||
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| RAM State: | ||
| ========== | ||
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| Main RAM lc ( bank 1) | ||
| $e000 | ||
| ... | ||
| $d400 RWTS18 | ||
| $d300 RWTS18 | ||
| $d200 RWTS18 | ||
| $d100 RWTS18 | ||
| $d000 RWTS18 | ||
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| $3400 RWTS18 | ||
| $3300 RWTS18 | ||
| $3200 RWTS18 | ||
| $3100 RWTS18 | ||
| $3000 RWTS18 | ||
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| $0900 BOOT.S stage2 | ||
| $0800 BOOT.S stage1 | ||
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| Now what stage2 does is unclear since it is using rwts18 with some parameters. But in the end it jumps to $ee00 (where probably is the content of HIRES.S. | ||
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| Q: If rwts18 is a track loader there must be something else loaded in memory, what is it ? | ||
| Q: $ee00 is in Main RAM or in Auxiliary RAM Bank1 (a.k.a l.d a.k.a language card) ? | ||
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| Temp Answer: For now I am going to assume this is all stored in Auxiliary Memory (Language Card). | ||
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| First instruction in HIRES.S is: | ||
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| jmp boot3 | ||
| boot3 = $f880 | ||
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| So I assume the content of MASTER.S is at $f880 | ||
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| RAM State: | ||
| ========== | ||
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| Main RAM lc ( bank 1) | ||
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| $f880 MASTER.S | ||
| $ee00 HIRES.S | ||
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| $e000 | ||
| ... | ||
| $d400 RWTS18 | ||
| $d300 RWTS18 | ||
| $d200 RWTS18 | ||
| $d100 RWTS18 | ||
| $d000 RWTS18 | ||
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| $3400 RWTS18 | ||
| $3300 RWTS18 | ||
| $3200 RWTS18 | ||
| $3100 RWTS18 | ||
| $3000 RWTS18 | ||
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| $0900 BOOT.S stage2 | ||
| $0800 BOOT.S stage1 | ||
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| First instruction in MASTER.S is: | ||
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| jmp FIRSTBOOT | ||
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| This is where stage3 is located. | ||
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| Many helper function to switch banks. | ||
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| First boot (stage3): | ||
| Seems to be loading the highres tables | ||
| (Q: What are the tables ?) | ||
| and hires routines in Auxiliary memory. | ||
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| jsr initsystem | ||
| TOPCTRL.S:INITSYSTEM | ||
| jsr setcenter | ||
| jsr setfastaux | ||
| jsr initgame * Initialize vars before starting game | ||
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| Then jump to the game loop which is called the ATTRACT MODE | ||
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| jmp AttractLoop | ||
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| MASTER.S | ||
| ATTRACTMODE | ||
| AttractLoop | ||
| jsr SetupDHires | ||
| jsr blackout | ||
| jmp LoadStage1A | ||
| jsr driveon | ||
| jsr ]lsub | ||
| jsr setmain | ||
| jsr rw18 | ||
| jsr rw18 | ||
| jsr loadmusic1 | ||
| jsr setaux | ||
| jmp driveoff | ||
| jsr PubCredit | ||
| jsr AuthorCredit | ||
| jsr TitleScreen | ||
| jsr Prolog1 | ||
| jsr PrincessScene | ||
| jsr SetupDHires | ||
| jsr Prolog2 | ||
| jsr SilentTitle | ||
| jmp Demo | ||
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| Pressing a key will skip all that "attract" thing....Where is the trigger key -> routine ? | ||
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| jmp Demo | ||
| jsr blackout | ||
| jsr LoadStage3 | ||
| jsr setdemolevel | ||
| jsr rdbluep | ||
| jsr driveoff | ||
| lda #0 | ||
| jmp start | ||
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| Main Loop in in TOPCTRK.S | ||
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| MainLoop | ||
| jsr rnd | ||
| jsr demokeys | ||
| jmp START ;During demo, press any key to play | ||
| jsr misctimers | ||
| jsr NextFrame | ||
| jsr flashon | ||
| jsr FrameAdv ;Draw next frame & show it | ||
| jsr playback ;Play sounds | ||
| jsr zerosound ;& zero sound table | ||
| jsr flashoff | ||
| jsr songcues ;Play music | ||
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| //Check if we need to jump to the next level | ||
| lda NextLevel | ||
| cmp level | ||
| beq MainLoop ;Continue until we change levels | ||
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| jsr yellowcheck ;copy protect! | ||
| jmp LoadNextLevel | ||
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| Q: What is this yellowcheck copy protection mecanism ? | ||
| yellowcheck | ||
| cmp #2 | ||
| bne ]rts | ||
| jsr showtext | ||
| ldx #10 | ||
| jmp yellow ;in gamebg | ||
| GAMEBQ.S | ||
| 2nd level copy protection | ||
| signature check routine | ||
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| ;sets yellowflag ($7c) hibit | ||
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