Changeset 45669 in vbox for trunk/src/VBox

Timestamp:

Apr 22, 2013 3:37:42 PM (12 years ago)

Author:

vboxsync

Message:

BIOS: add int15 function 0xd04f

Location:

trunk/src/VBox/Devices/PC/BIOS

Files:

• orgs.asm (modified) (1 diff)
• system.c (modified) (16 diffs)

trunk/src/VBox/Devices/PC/BIOS/orgs.asm

@@ -1552 +1552 @@
                 cmp     ah, 0E8h
                 je      int15_handler32
+                cmp     ah, 0d0h
+                je      int15_handler32
                 pusha
                 cmp     ah, 53h         ; APM function?

trunk/src/VBox/Devices/PC/BIOS/system.c

@@ -192 +192 @@
     "retf"                  \
     parm [ax] modify nomemory aborts;
-    
+
 // @todo: This method is silly. The RTC should be programmed to fire an interrupt
 // instead of hogging the CPU with inaccurate code.
@@ -224 +224 @@
 {
     uint8_t     oldval;
-    
+
     // Use PS/2 System Control port A to set A20 enable
-    
+
     // get current setting first
     oldval = inb(0x92);
-    
+
     // change A20 status
     if (val)
@@ -235 +235 @@
     else
         outb(0x92, oldval & 0xfd);
-    
+
     return((oldval & 0x02) != 0);
 }
@@ -276 +276 @@
 #define ECX     r.gr.u.r32.ecx
 #define EDX     r.gr.u.r32.edx
+#define ESI     r.gr.u.r32.esi
+#define EDI     r.gr.u.r32.edi
 #define ES      r.es
 
@@ -386 +388 @@
             SET_AL(GET_AL() - 1);
         }
-        
+
         break;
         }
@@ -397 +399 @@
         // +++ should probably have descriptor checks
         // +++ should have exception handlers
-        
+
         // turn off interrupts
         int_disable();    //@todo: aren't they disabled already?
-        
+
         prev_a20_enable = set_enable_a20(1); // enable A20 line
-        
+
         // 128K max of transfer on 386+ ???
         // source == destination ???
-        
+
         // ES:SI points to descriptor table
         // offset   use     initially  comments
@@ -415 +417 @@
         // 20..27   CS      zeros      filled in by BIOS
         // 28..2f   SS      zeros      filled in by BIOS
-        
+
         //es:si
         //eeee0
         //0ssss
         //-----
-        
+
         // check for access rights of source & dest here
-        
+
         // Initialize GDT descriptor
         base15_00 = (ES << 4) + SI;
@@ -433 +435 @@
         write_byte(ES, SI+0x08+5, 0x93);     // access
         write_word(ES, SI+0x08+6, 0x0000);   // base 31:24/reserved/limit 19:16
-        
+
         // Initialize CS descriptor
         write_word(ES, SI+0x20+0, 0xffff);// limit 15:00 = normal 64K limit
@@ -440 +442 @@
         write_byte(ES, SI+0x20+5, 0x9b);  // access
         write_word(ES, SI+0x20+6, 0x0000);// base 31:24/reserved/limit 19:16
-        
+
         // Initialize SS descriptor
         ss = read_ss();
@@ -450 +452 @@
         write_byte(ES, SI+0x28+5, 0x93);     // access
         write_word(ES, SI+0x28+6, 0x0000);   // base 31:24/reserved/limit 19:16
-        
+
         pm_stack_save(CX, ES, SI);
         pm_enter();
@@ -456 +458 @@
         pm_exit();
         pm_stack_restore();
-        
+
         set_enable_a20(prev_a20_enable);
-        
+
         // turn interrupts back on
         int_enable();
-        
+
         SET_AH(0);
         CLEAR_CF();
@@ -473 +475 @@
 #else
         AX = (inb_cmos(0x31) << 8) | inb_cmos(0x30);
-        
+
         // According to Ralf Brown's interrupt the limit should be 15M,
         // but real machines mostly return max. 63M.
         if(AX > 0xffc0)
             AX = 0xffc0;
-        
+
         CLEAR_CF();
 #endif
@@ -488 +490 @@
         // BH/BL contains starting interrupt numbers for PIC0/PIC1
         // This subfunction does not return!
-        
+
         // turn off interrupts
         int_disable();  //@todo: aren't they off already?
-        
+
         set_enable_a20(1); // enable A20 line; we're supposed to fail if that fails
-        
+
         // Initialize CS descriptor for BIOS
         write_word(ES, SI+0x38+0, 0xffff);// limit 15:00 = normal 64K limit
@@ -592 +594 @@
         timer_wait(DX, CX);
         break;
-    
+
+    case 0xd0:
+        if (GET_AL() != 0x4f)
+            goto int15_unimplemented;
+        if (EBX == 0x50524f43 && ECX == 0x4d4f4445 && ESI == 0 && EDI == 0)
+        {
+            CLEAR_CF();
+            ESI = EBX;
+            EDI = ECX;
+            EAX = 0x49413332;
+        }
+        else
+            goto int15_unimplemented;
+        break;
+
     case 0xe8:
         switch(GET_AL()) {
@@ -766 +782 @@
             // do we have any reason to fail here ?
             CLEAR_CF();
-            
+
             // my real system sets ax and bx to 0
             // this is confirmed by Ralph Brown list
@@ -773 +789 @@
             // regs.u.r16.ax = 0;
             // regs.u.r16.bx = 0;
-            
+
             // Get the amount of extended memory (above 1M)
             CX = (inb_cmos(0x31) << 8) | inb_cmos(0x30);
-            
+
             // limit to 15M
             if(CX > 0x3c00)
                 CX = 0x3c00;
-            
+
             // Get the amount of extended memory above 16M in 64k blocks
             DX = (inb_cmos(0x35) << 8) | inb_cmos(0x34);
-            
+
             // Set configured memory equal to extended memory
             AX = CX;