From: notaz <notasas@gmail.com>
Date: Thu, 23 Oct 2014 23:58:50 +0000 (+0300)
Subject: megaed-sv: don't use stop, corrupts MED SDRAM
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=megadrive.git;a=commitdiff_plain;h=c6d1079a7b38a586ea977236d1075075d1e50d57

megaed-sv: don't use stop, corrupts MED SDRAM
---

diff --git a/megaed-sv/main.c b/megaed-sv/main.c
index d693dff..fa0c163 100644
--- a/megaed-sv/main.c
+++ b/megaed-sv/main.c
@@ -518,12 +518,16 @@ int main()
     printf("\n");
     printf("version: %02x, start_hvc: %04x\n",
            read8(0xa10001), start_hvc);
-    printf("ED os/fw: %x/%x\n\n", ed->osGetOsVersion(),
+    printf("ED os/fw: %d/%d\n\n", ed->osGetOsVersion(),
            ed->osGetFirmVersion());
 
     for (;;) {
         if (!ed->usbRdReady()) {
-            asm volatile("stop #0x2000");
+            /* note: stop corrupts SDRAM */
+            //asm volatile("stop #0x2000");
+            asm volatile(
+                "move.l #1000/10, %0\n"
+                "0: dbra %0, 0b\n" : "=r" (i) :: "cc");
             continue;
         }