Mega Man: Rockman - Nerfed Spikes

This hack of Rockman 1 makes the spikes deal only damage to the player instead of instant death. This patch is for a Japan ROM, but can also be applied to a USA version ROM.

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BANKORG_D $0ED7DE ;?g?Q?ɉ?????G?ꂽ??
jmp SpikeDamage_H

BANKORG_D $0ED81B ;?g?Q?ɏc?ɐG?ꂽ??
jmp SpikeDamage_V


BANKORG_D $0FFF00 ;?󂫗̈?𗘗p
SpikeDamage_H:
jsr SpikeDamage_Common
ldy #$01
jmp $D7D9

SpikeDamage_V:
jsr SpikeDamage_Common
lda #$00
jmp $D7FF

SpikeDamage_Common:
lda <$55 ;???G????
bne .NotDamage
sec
lda <$6A ;HP
sbc #(4) ;?_???[?W??
bpl .NotFixHP
lda #$00
.NotFixHP
sta <$6A ;HP
beq .Dead
lda $0420+0
ora #$03
sta $0420+0 ;?m?b?N?o?b?N??ԂɈڍs????
lda #$6F
sta <$55 ;???G????
.NotDamage
rts
.Dead
pla
pla
jmp $C219 ;???S???̏???



Database match: Rockman (Japan) (En)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 5914D409EA027A96C2BB58F5136C5E7E9B2E8300
File CRC32: E0141A24
ROM SHA-1: EA93F3F2FD561C1CEE59AD51CFCB10F3DD83766F
ROM CRC32: D31DC910