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ipxe/contrib/vm/bochs-writable-ROM-patch

bochs-writable-ROM-patch 606B
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  1. --- memory/memory.cc	18 Oct 2008 18:10:14 -0000	1.71

  2. +++ memory/memory.cc	21 Oct 2008 19:47:07 -0000

  3. @@ -172,7 +172,11 @@

  4.              break;

  5. 

  6.            case 0x0:   // Writes to ROM, Inhibit

  7. -            BX_DEBUG(("Write to ROM ignored: address 0x" FMT_PHY_ADDRX ", data %02x", a20addr, *data_ptr));

  8. +            if ((a20addr & 0xfffe0000) == 0x000e0000) {

  9. +	      BX_DEBUG(("Write to ROM ignored: address 0x" FMT_PHY_ADDRX ", data %02x", a20addr, *data_ptr));

  10. +	    } else {

  11. +	      BX_MEM_THIS rom[(a20addr & EXROM_MASK) + BIOSROMSZ] = *data_ptr;

  12. +            }

  13.              break;

  14. 

  15.            default: