za2600/room_audit.txt at master · mzxrules/za2600 · GitHub

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the room code audit

RS_TRY_ENTER_CAVE
; 6 callers + 1 fallthrough
; Rs_EntCaveWallLeft <- Rs_EntCaveWallLeftBlocked
; Rs_EntCaveWallRight <- Rs_EntCaveWallRightBlocked
; Rs_EntCaveWallCenter <- Rs_EntCaveWallCenterBlocked
; Rs_EntCaveWall_P2820 <- Rs_EntCaveWallBlocked_P2820
; Rs_EntCaveWall_P4820 <- Rs_EntCaveWallBlocked_P4820
; Rs_Waterfall
; Rs_EntCaveMid <- Rs_EntCaveMidSecretNorth

DO: test if condition to trigger cave enter is met.


RS_ENTER_CAVE
; Fallthrough from RS_TRY_ENTER_CAVE
; 0 callers (it's a roomscript helper, not routine)
; x,y is new worldSX,worldSY

DO:
* assumes roomEX stores cv index
if cv >= CV_LV_START:
    set worldSR to roomId
    set worldSX, worldSY (reg x,y)
    set worldIdNext
    GOTO HALT with y = #HALT_TYPE_ENTER_DUNG
else:
    jsr ENTER_CAVE
    GOTO HALT with y = #HALT_TYPE_ENTER_CAVE

ENTER_CAVE
; 3 callers
; RS_ENTER_CAVE
; Rs_EntDungStairs
; EnStairs

DO:
set worldSR to roomId
set worldSX, worldSY (reg x,y)
set roomIdNext = roomId | $80 (subworld)
set roomFlags |= #RF_EV_LOAD


The two problems:

Exiting the current room via "cave" or "stairs" isn't standardized.
The roomEX behavior for exits is dependent on script

New plan:

An "ENTER_SUBWORLD" routine within the halt system? that handles both cases.

if overworld
* roomEX will be a Cv enum
* worldSX, worldSY will be stair x, y for all stairs

if dungeon
* positive roomEX will be a roomId
* negative roomEX will be remapped to GetItem
* next x,y will be $34,$10; edge case $74,$48


Stair situation in dungeons:

Q1 Level 8 $   > spiral room with hidden stairs and a small key on room clear
Q1 Level 8 $37 > stair east with bomb drop
Q1 Level 9 $69 > diamond staircase with small key on room clear
Q2 Level 1 $   > stair entrance with small key on room clear
Q2 Level 2 $3B > stair east with bomb drop
Q2 Level 2 $7B > stair east with rupee 5 drop
Q2 Level 3 $76 > reverse C room with hidden stairs and a compass (insta appear, center)
Q2 Level 3 $   > stair entrance with small key insta appear
Q2 Level 6 $   > free standing rupee in top right hidden stair
Q2 Level 7 $   > middle pushblock with top right hidden stair, and compass (insta appear)
Q2 Level 7 $   > middle pushblock with top right hidden stair, and key (insta appear?)
Q2 Level 7 $   > c reverse c pushblock with top right hidden stair, and key (insta?)
Q2 Level 8 $02 > middle pushblock with top right hidden stair, and key


Room Shape for rooms with stairs

* Diamond (spawn outside ring in bottom middle)
* Stair entrance always available on right screen
* Stairs appear in top right corner, different pushblock options
- Q2 Level 7, room $21 is triple horizontal walls (center merged)
- Q2 Level 7, room $45 is triple horizontal walls
- Q2 level 7, room $57 is diagonal lines of blocks
- Q2 level 7, room $41 is reverse C

Q2 Level 7, 8, 9 begin throwing in trap stairs

Q2 Level 8, $11 -> $47 puts you below "lava" but dungeon ent requires ladder anyway
Q2 Level 8, $37 -> $61 puts you above a horizontal walled "hallway"  (set spawn top right)
Q2 Level 9, $09 -> $1D puts you right of a vertical walled "hallway", (set spawn top right)>