X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=sim%2Fucsim%2Fs51.src%2Fuc390.cc;h=623d3915ae784dca32376fbade99c66e98edbd52;hb=6b5e433931b8b1ba61bb6c694f74f42f48c3acf5;hp=80dda525620c4b7ba040dceaa7a471536a5684d0;hpb=57b16299d7cd3c71c3644c39089a5cee84639d83;p=fw%2Fsdcc

diff --git a/sim/ucsim/s51.src/uc390.cc b/sim/ucsim/s51.src/uc390.cc
index 80dda525..623d3915 100644
--- a/sim/ucsim/s51.src/uc390.cc
+++ b/sim/ucsim/s51.src/uc390.cc
@@ -390,9 +390,12 @@ t_uc390::get_mem_size (enum mem_class type)
   switch (type)
     {
       case MEM_ROM:
-        return 128*1024;	// 4*1024*1024; 4 Meg possible
+        return 128*1024;	  // 128 kByte; 4 MByte possible
       case MEM_XRAM:
-        return 128*1024;	// 4*1024*1024; 4 Meg possible
+	/* tinibios copies 128 bytes of the Interrupt Vector Table
+	   to 0x100000. This is exactly the minimum of memory to run ucSim
+	   without any error. */
+        return 1*1024*1024 + 128; // 1 MByte + 128 bytes; 4 Mbytes possible
       case MEM_IRAM:
         return 256;
       case MEM_SFR: