v400.1 NPC Talk Text

// JMS v400.1 NPC Talk Text

[Enable]
Alloc(NPCTextData, 4096)
RegisterSymbol(NPCTextData)
NPCTextData:
dd #0
dd #0
dd #0

Alloc(ProcessPacket_Hook, 256)
Label(ProcessPacket_Hook_Ret)

ProcessPacket_Hook:
pushad
mov esi,[ebp+8] // InPacket
cmp dword ptr [esi+C],#20 // minimum data length
jbe ProcessPacket_Hook_Ret
mov eax,[esi+8] // Packet
add eax,4
cmp word ptr [eax],0730 // NPC Talk
jne ProcessPacket_Hook_Ret
cmp byte ptr [eax+2],#4 // always 4?
jne ProcessPacket_Hook_Ret
// [eax+#3] NPC ID
// [eax+#12] Text Length
// [eax+#14] Text

mov ebx,[eax+3]
mov [NPCTextData],ebx
movzx ebx, word ptr [eax+C]
mov [NPCTextData+4],ebx

lea ebx,[eax+E]
lea ecx,[NPCTextData+8]
push [NPCTextData+4]
push ebx
push ecx
call memcpy
add esp,C
ProcessPacket_Hook_Ret:
popad
jmp 049DF32E


// ProcessPacket vm section
049DF31D:
jmp ProcessPacket_Hook

[Disable]
049DF31D:
jmp 049DF32E

DeAlloc(ProcessPacket_Hook)
DeAlloc(NPCTextData)
UnRegisterSymbol(NPCTextData)