From: iLag <ilagdoesntcheckthisemail@gmail.com>
Date: Wed, 22 Mar 2017 21:19:35 +0000 (-0700)
Subject: Add support for single-line cheats and PAR codes.
X-Git-Tag: v1.93~53
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8655fd046255007513449f76cf2d9f5efd84f49e;p=picodrive.git

Add support for single-line cheats and PAR codes.

notaz: include required header
---

diff --git a/pico/patch.c b/pico/patch.c
index b961e802..40e8372c 100644
--- a/pico/patch.c
+++ b/pico/patch.c
@@ -22,6 +22,7 @@
  */
 
 #include "pico_int.h"
+#include "memory.h"
 #include "patch.h"
 
 struct patch
@@ -142,7 +143,7 @@ static void hex_decode(const char *code, struct patch *result)
 /* THIS is the function you call from the MegaDrive or whatever. This figures
  * out whether it's a genie or hex code, depunctuates it, and calls the proper
  * decoder. */
-static void decode(const char* code, struct patch* result)
+void decode(const char* code, struct patch* result)
 {
   int len = strlen(code), i, j;
   char code_to_pass[16], *x;
@@ -299,6 +300,8 @@ void PicoPatchPrepare(void)
 		PicoPatches[i].addr &= ~1;
 		if (PicoPatches[i].addr < Pico.romsize)
 			PicoPatches[i].data_old = *(unsigned short *)(Pico.rom + PicoPatches[i].addr);
+		else
+			PicoPatches[i].data_old = (unsigned short) m68k_read16(PicoPatches[i].addr);
 		if (strstr(PicoPatches[i].name, "AUTO"))
 			PicoPatches[i].active = 1;
 	}
@@ -328,7 +331,15 @@ void PicoPatchApply(void)
 		}
 		else
 		{
-			/* TODO? */
+			if (PicoPatches[i].active)
+				m68k_write16(PicoPatches[i].addr,PicoPatches[i].data);
+			else {
+				// if current addr is not patched by older patch, write back original val
+				for (u = 0; u < i; u++)
+					if (PicoPatches[u].addr == addr) break;
+				if (u == i)
+					m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
+			}
 		}
 	}
 }