Changeset 75149 in vbox for trunk/src/VBox/Devices/Graphics/BIOS/vgabios.c

Timestamp:

Oct 29, 2018 2:14:22 PM (6 years ago)

Author:

vboxsync

Message:

BIOS: Added custom video mode set function not limited by the list of available VBE modes (bugref:9273).

File:

• trunk/src/VBox/Devices/Graphics/BIOS/vgabios.c (modified) (2 diffs)

trunk/src/VBox/Devices/Graphics/BIOS/vgabios.c

@@ -2108 +2108 @@
 extern void vbe_biosfn_save_restore_state(uint16_t STACK_BASED *AX, uint16_t CX, uint16_t DX, uint16_t ES, uint16_t STACK_BASED *BX);
 extern void vbe_biosfn_get_set_scanline_length(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
+extern void private_biosfn_custom_mode(uint16_t STACK_BASED *AX, uint16_t STACK_BASED *BX, uint16_t STACK_BASED *CX, uint16_t STACK_BASED *DX);
+
 
 // --------------------------------------------------------------------------------------------
@@ -2335 +2337 @@
           }
         break;
+   case 0x56:
+     if (vbe_has_vbe_display()) {
+       switch(GET_AL())
+       {
+         case 0x42:
+           private_biosfn_custom_mode(&AX,&BX,&CX,&DX);
+           break;
+         default:
+           AX=0x0100;
+           break;
+       }
+     } else {
+         // No VBE display
+         AX=0x0100;
+     }
+     break;
 #endif