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[contrib] Add contrib/vm, containing utilities from old contrib/bochs

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-09-22 14:19:25 +01:00
parent c4af205cf0
commit 041f01e601
6 changed files with 1246 additions and 0 deletions
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15
contrib/vm/bochs-writable-ROM-patch Normal file
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@@ -0,0 +1,15 @@
--- memory/memory.cc 18 Oct 2008 18:10:14 -0000 1.71
+++ memory/memory.cc 21 Oct 2008 19:47:07 -0000
@@ -172,7 +172,11 @@
break;
case 0x0: // Writes to ROM, Inhibit
- BX_DEBUG(("Write to ROM ignored: address 0x" FMT_PHY_ADDRX ", data %02x", a20addr, *data_ptr));
+ if ((a20addr & 0xfffe0000) == 0x000e0000) {
+ BX_DEBUG(("Write to ROM ignored: address 0x" FMT_PHY_ADDRX ", data %02x", a20addr, *data_ptr));
+ } else {
+ BX_MEM_THIS rom[(a20addr & EXROM_MASK) + BIOSROMSZ] = *data_ptr;
+ }
break;
default: