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update reserve backfill #371

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update reserve backfill #371

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6372c4b
update reserve backfill
nn357 Aug 18, 2026
40f90ea
update based on stagshot review.
nn357 Aug 20, 2026
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Binary file modified patches/ips/reserve_backward_fill.ips
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20 changes: 7 additions & 13 deletions patches/src/reserve_backward_fill.asm
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Original file line number Diff line number Diff line change
Expand Up @@ -238,35 +238,29 @@ hook_reserve_delay_counter_init:
beq .vanilla
lda $09c2 ; Reserve tank delay sound counter = [Samus health] - 1, rounded up to nearest 8
dec a
clc
adc #$0007
and #$fff8
sta $0757
jml $82AF6B ; Return to vanilla code at handling the reserve tank delay sound counter
bra .return
.vanilla
lda $09d6 ; Hijacked code
.return
clc
jml $82AF62 ; Return to vanilla code

hook_reserve_tank_refilling:
lda !arrow_mode
beq .vanilla

; Samus health -= 1, unless this would be 0
lda $09C2
cmp #$0002
bcc .stop_etanks_empty
dec a
beq .stop_etanks_empty
sta $09C2
lda $09D6
inc a
cmp $09D4
bpl .stop_dump_etanks
bcs .stop_dump_etanks
sta $09D6
lda $09C2
dec a
beq .stop_etanks_empty

bra .done

.stop_dump_etanks
; Reserves hit full, vent regular energy
lda $09D4
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