Updated to v7.2 (changelog in comments)

README.md

@@ -2,13 +2,20 @@
 Chronoswitch is a downgrader for the Playstation Portable (PSP).
 
 ## Installation
-Download and extract the latest version from the releases on this github page. Copy the `PSP` folder from the extracted output to your memory stick. You will need the firmware update for version you wish to downgrade to. If you want to downgrade to 6.20, you will need the 6.20 official update. If you're downgrading a PSPgo, make sure you download the official firmware appropriate for that device.
+Download and extract the latest version from the releases on this github page. Copy the `PSP` folder from the extracted output to your memory stick. You will need the firmware update for version you wish to downgrade to. If you want to downgrade to 6.60, you will need the 6.60 official update. If you're downgrading a PSPgo, make sure you download the official firmware appropriate for that device.
 
 Copy the official firmware update to `PSP/GAME/UPDATE/EBOOT.PBP` on your memory stick. If you're using a PSPgo, make sure this copied to the internal storage instead.
 
 The downgrader is "signed", and can be launched without having a custom firmware installed. Once you run the application, follow the on-screen instructions.
 
 ## Changelog
+### Version 7.2
+* Replaced 'factory firmware limitation', which prevented certain PSPs from being downgradable at all or limited them from being downgraded to certain firmwares they theoretically support.
+* This fixes most cases where an IDXFFFFFFFF or CAAFFFFFCF7 error could appear.
+* Chronoswitch now detects your PSP's motherboard alongside its model and allows flashing all firmwares (5.00+) that are supported by it.
+* Removed support for downgrading 09g units below 6.30.
+### Version 7.1
+* Added experimental support for 07g units on 6.6x.
 ### Version 7.0
 * Added support for Infinity.
 ### Version 6.1
@@ -26,6 +33,7 @@ The downgrader is "signed", and can be launched without having a custom firmware
 * Silverspring
 * Bubbletune
 * qwikrazor87
+* The Zett
 
 ## Socials
 Follow me on Twitter [@DaveeFTW](https://twitter.com/DaveeFTW), and check out [my blog](https://lolhax.org).

src/Makefile.signed

@@ -19,7 +19,7 @@ LIBS = -lpsppower
 PSP_FW_VERSION = 271
 
 EXTRA_TARGETS = EBOOT.PBP
-PSP_EBOOT_TITLE = Chronoswitch Downgrader
+PSP_EBOOT_TITLE = Chronoswitch Downgrader v7.2
 
 BUILD_PRX = 1
 

src/downgrade660_ctrl/main.c

@@ -125,37 +125,22 @@ int ApplyFirmware(SceModule2 *mod)
 
 	/* check for error */
 	if (res < 0)
-	{
-		/* check model */
-		if (sceKernelGetModel() != 0)
-		{
-			/* invalid error */
-			return -4;
-		}
-
-		/* firmware 1.00 */
+	{		
+		/* set minimum firmware to 1.00, if unknown */
 		min_ver = 0x100;
 	}
 	else
 	{
-		/* convert to hex */
+		/* convert to hex */		
 		min_ver = (((device_fw_ver[0] - '0') & 0xF) << 8) | (((device_fw_ver[2] - '0') & 0xF) << 4) | (((device_fw_ver[3] - '0') & 0xF) << 0);
 	}
 
 	/* set the result to 0 */
 	res = 0;
 
-	/* check if the updater is less than the minimum version */
-	if (updater_ver < min_ver)
-	{
-		/* ok, check for 6.35 and 09g */
-		if ((min_ver != 0x630 && min_ver != 0x635) || sceKernelGetModel() != 8)
-		{
-			/* error */
-			pspSdkSetK1(k1);
-			return -5;
-		}
-
+	/* check if the updater is 620 and the model is 09g */
+	if (updater_ver == 0x620 && sceKernelGetModel() == 8)
+	{		
 		/* set result to 1 D: */
 		res = 1;
 	}
@@ -281,7 +266,7 @@ int OnModuleStart(SceModule2 *mod)
 		/* check for success */
 		if (res >= 0)
 		{
-			/* do these patches if we have 09g going to 6.XX */
+			/* do these patches if we have 09g going to <6.3X */
 			if (res == 1)
 			{
 				/* patch the IO */

src/downgrade_ctrl/main.c

@@ -125,40 +125,25 @@ int ApplyFirmware(void)
 
 	/* check for error */
 	if (res < 0)
-	{
-		/* check model */
-		if (sceKernelGetModel() != 0)
-		{
-			/* invalid error */
-			return -4;
-		}
-
-		/* firmware 1.00 */
+	{		
+		/* set minimum firmware to 1.00, if unknown */
 		min_ver = 0x100;
 	}
 	else
 	{
 		/* convert to hex */
-		min_ver = (((device_fw_ver[0] - '0') & 0xF) << 8) | (((device_fw_ver[2] - '0') & 0xF) << 4) | (((device_fw_ver[3] - '0') & 0xF) << 0);
+		min_ver = (((device_fw_ver[0] - '0') & 0xF) << 8) | (((device_fw_ver[2] - '0') & 0xF) << 4) | (((device_fw_ver[3] - '0') & 0xF) << 0);		
 	}
 
 	/* set the result to 0 */
 	res = 0;
 
-	/* check if the updater is less than the minimum version */
-	if (updater_ver < min_ver)
-	{
-		/* ok, check for 6.35 and 09g */
-		if ((min_ver != 0x630 && min_ver != 0x635) || sceKernelGetModel() != 8)
-		{
-			/* error */
-			pspSdkSetK1(k1);
-			return -5;
-		}
-
+	/* check if the updater is 620 and the model is 09g */
+	if (updater_ver == 0x620 && sceKernelGetModel() == 8)
+	{		
 		/* set result to 1 D: */
 		res = 1;
-	}
+	}	
 
 	/* do spoof! */
 	g_spoof_ver = updater_ver;
@@ -268,7 +253,7 @@ int OnModuleStart(SceModule *mod)
 		/* check for success */
 		if (res >= 0)
 		{
-			/* do these patches if we have 09g going to 6.XX */
+			/* do these patches if we have 09g going to <6.3X */
 			if (res == 1)
 			{
 				/* patch the IO */

src/main.c

@@ -28,7 +28,7 @@ PSP_MODULE_INFO("Chronoswitch", 0, 1, 1);
 PSP_MAIN_THREAD_ATTR(PSP_THREAD_ATTR_VFPU);
 PSP_HEAP_SIZE_KB(3 << 10);
 
-#define DOWNGRADER_VER    ("7.0")
+#define DOWNGRADER_VER    ("7.2")
 
 typedef struct __attribute__((packed))
 {
@@ -182,12 +182,12 @@ int main(int argc, char *argv[])
     /* get the PSP model */
     int model = execKernelFunction(getModel);
     int true_model = model;
+    /* get the baryon */
+    u32 baryon = execKernelFunction(getBaryon);
 
     /* check for real model if it claims it is a 04g (can be 09g) */
     if (model == 3)
     {
-        /* get the baryon */
-        u32 baryon = execKernelFunction(getBaryon);
 
         /* now get the determinating model */
         u32 det_model = (baryon >> 16) & 0xFF;
@@ -211,20 +211,89 @@ int main(int argc, char *argv[])
 
     /* display model */
     printf("Your PSP reports model %02ig.\n", model+1);
+
 
     /* check if real != true */
     if (true_model != model)
     {
         /* display */
         printf("Your PSP is originally a %02ig model.\n", true_model + 1);
-        ErrorExit(10000, "Due to the experimental nature of the whole 09g to 04g downgrade, functionality to change firmware is prohibited through this program.");
+        ErrorExit(10000, "Due to the experimental nature of the whole 09g to 04g downgrade, functionality to change firmware is prohibited through this program.");		
     }
+
+	/* delay the thread */
+    sceKernelDelayThread(1 *1000*1000);
+	/* extra disclaimer for 07g devices, as support for them has been barely tested
+	   theoretically they should be fully supported for fws 6.30 to 6.6x */
+	if (baryon == 0x012E4000)
+    {
+        printf("\n" "Your PSP reports model %02ig and reflashing is slightly more risky.\n", model+1);
+		printf("Proceed? (X = Yes, R = No)\n");
+        while (1)
+        {
+            sceCtrlPeekBufferPositive(&pad_data, 1);
+
+            /* filter out previous buttons */
+            cur_buttons = pad_data.Buttons & ~prev_buttons;
+            prev_buttons = pad_data.Buttons;
+
+            /* check for cross */
+            if (cur_buttons & PSP_CTRL_CROSS)
+            {
+                break;
+            }
+
+            else if (cur_buttons & PSP_CTRL_RTRIGGER)
+            {
+                ErrorExit(5000, "Exiting in 5 seconds.\n");
+            }
+        }
+    }	
 
     /* delay the thread */
-    sceKernelDelayThread(5*1000*1000);
+    sceKernelDelayThread(4*1000*1000);
+
+    /* get the updater version */
+    u32 upd_ver = get_updater_version(model == 4);
+
+	/* make sure that we are not attempting to downgrade a PSP below its firmware boundaries */
+
+    if ((baryon == 0x00403000) && (upd_ver < 0x660)) {
+        printf("This app does not support downgrading a PSP 11g below 6.60.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    } /* Disabled functionality to downgrade 09g to 6.20, otherwise would be <0x620 */
+	else if ((baryon == 0x002E4000) && (upd_ver < 0x630)) {
+        printf("This app does not support downgrading a PSP 09g below 6.30.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }
+	else if ((baryon == 0x012E4000) && (upd_ver < 0x630)) {
+        printf("This app does not support downgrading a PSP 07g below 6.30.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }	/* baryon check for TA-091, model check is done for the rare PSPgo TA-094 board (its baryon value is unknown) */
+	else if (((baryon == 0x00304000) || (model == 4)) && (upd_ver < 0x570)) {
+        printf("This app does not support downgrading a PSP 05g below 5.70.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }
+	else if ((baryon == 0x002C4000) && (upd_ver < 0x570)) {
+        printf("This app does not support downgrading a PSP 04g below 5.70.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }	
+	else if (((baryon == 0x00285000) || (baryon == 0x00263100)) && (upd_ver < 0x420)) {
+        printf("This app does not support downgrading a PSP 03g below 4.20.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }
+	else if (((baryon == 0x00243000) || (baryon == 0x00234000) || (baryon == 0x0022B200)) && (upd_ver < 0x360)) {
+        printf("This app does not support downgrading a PSP 02g below 3.60.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }
+	else if (((baryon == 0x00121000) || (baryon == 0x00114000)) && (upd_ver < 0x200)) {
+        printf("This app does not support downgrading a TA-082/086 PSP 01g below 2.00.\n");
+        ErrorExit(5000, "Exiting in 5 seconds.\n");
+    }
+
 
-    /* check for 09g, we treat this as a 04g */
-    if(model == 8)
+    /* check for 09g or 07g, we treat this as a 04g */
+    if(model == 8 || model == 6)
     {
         model = 3;
     }
@@ -233,9 +302,9 @@ int main(int argc, char *argv[])
     if (model != 0 &&            /* PSP PHAT */
         model != 1 &&            /* PSP SLIM */
         model != 2 &&            /* PSP 3000 */
-        model != 3 &&            /* PSP 4000 */
-        model != 4 &&            /* PSPgo */
-        model != 10            /* PSP E-1000 (Street) */
+        model != 3 &&            /* PSP 4000/7000/9000 */
+        model != 4 &&            /* PSP Go */
+        model != 10              /* PSP E1000 (Street) */
     )
     {
         /* unsupported */
@@ -302,16 +371,8 @@ int main(int argc, char *argv[])
         }
     }
 
-    /* get the updater version */
-    u32 upd_ver = get_updater_version(model == 4);
-
-    if ((model == 10) && (upd_ver < 0x660)) {
-        printf("This app does not support downgrading a PSP 11g below 6.60.\n");
-        ErrorExit(5000, "Exiting in 5 seconds.\n");
-    }
-
     /* do confirmation stuff */
-    printf("Will attempt to Downgrade: %X.%X -> %X.%X.\n", (g_devkit_version >> 24) & 0xF, ((g_devkit_version >> 12) & 0xF0) | ((g_devkit_version >> 8) & 0xF), (upd_ver >> 8) & 0xF, upd_ver & 0xFF);
+    printf("\n" "Will attempt to Downgrade: %X.%X -> %X.%X.\n", (g_devkit_version >> 24) & 0xF, ((g_devkit_version >> 12) & 0xF0) | ((g_devkit_version >> 8) & 0xF), (upd_ver >> 8) & 0xF, upd_ver & 0xFF);
     printf("X to continue, R to exit.\n");
 
     /* get button */
@@ -361,7 +422,7 @@ int main(int argc, char *argv[])
         }
     }
 
-    printf("OK, good for launch\n");
+    printf("OK, good for launch!\n");
 
     /* go go go go go */
     res = execKernelFunction(launch_updater);