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阅读：1012回复：1
pci驱动问题！
调用INT 0X1A 的B101功能，判断是否支持PCI
#include.... main() { asm(\"mov $0xb1,%ah\\n //1 mov $0x01,%al\"); //2 asm(\"int $0x1a\"); //3 } 编译通过，可是单步执行到3时报：segmentation fault! why? 3kx!!!!!!!!!!!!!!1 |
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最新喜欢： Beshy
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沙发#
发布于：2002-05-11 12:15
楼上老兄请仔细看一下我贴给你的东西，调用时除了功能号还有其它的东西。
INT 1A - PCI BIOS v2.0c+ - INSTALLATION CHECK AX = B101h EDI = 00000000h ；；你忘记这里了！！！！ Return: AH = 00h if installed CF clear EDX = 20494350h (\' ICP\') EDI = physical address of protected-mode entry point (see #00731) AL = PCI hardware characteristics (see #00730) BH = PCI interface level major version (BCD) BL = PCI interface level minor version (BCD) CL = number of last PCI bus in system EAX, EBX, ECX, and EDX may be modified all other flags (except IF) may be modified Notes: this function may require up to 1024 byte of stack; it will not enable interrupts if they were disabled before making the call some BIOSes do not change EDI, so applications looking for the protected-mode entry point should set EDI to 00000000h before calling this function SeeAlso: AX=B181h |
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