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Limit extended_memory_in_64k to 3 GB - 16 MB. PCI Memory Address Space starts at 3 GB.

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Sebastian
This commit is contained in:
Stanislav Shwartsman 2011-06-10 06:38:11 +00:00
parent 1e95ccec7c
commit fecda2ce16
1 changed files with 2 additions and 1 deletions
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3
bochs/iodev/devices.cc
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@ -359,7 +359,8 @@ void bx_devices_c::init(BX_MEM_C *newmem)
DEV_cmos_set_reg(0x31, (Bit8u) ((extended_memory_in_k >> 8) & 0xff));
Bit32u extended_memory_in_64k = memory_in_k > 16384 ? (memory_in_k - 16384) / 64 : 0;
if (extended_memory_in_64k > 0xffff) extended_memory_in_64k = 0xffff;
// Limit to 3 GB - 16 MB. PCI Memory Address Space starts at 3 GB.
if (extended_memory_in_64k > 0xbf00) extended_memory_in_64k = 0xbf00;
DEV_cmos_set_reg(0x34, (Bit8u) (extended_memory_in_64k & 0xff));
DEV_cmos_set_reg(0x35, (Bit8u) ((extended_memory_in_64k >> 8) & 0xff));