在turbo c 2.0中執行AISOFT.C之後會有一個錯誤”undefined symbol '_ECX' in function read_configuration_area" 這個錯誤是發生在副程式PCI.C"ecx=_ECX"中 請問各位高手該如何解決這個問題呢? 在此先謝過! 以下為pci.c的部份程式: static int read_configuration_area(byte function, byte bus_number, byte device_and_function, byte register_number, dword *data) { int ret_status; word ax, flags; dword ecx; /* Load entry registers for PCI BIOS */ _BH = bus_number; _BL = device_and_function; _DI = register_number; _AH = PCI_FUNCTION_ID; _AL = function; /* Call PCI BIOS Int 1Ah interface */ geninterrupt(0x1a); ecx = _ECX; /*編譯時顯示此列錯誤*/ ax = _AX; flags = _FLAGS; /* if carry flag Set, error has occurred */ if ((flags & CARRY_FLAG) == 0) { /* Get Return code from BIOS */ ret_status = HIGH_BYTE(ax); /* If successful, return data */ if (ret_status == SUCCESSFUL) { *data = ecx; } } else { ret_status = NOT_SUCCESSFUL; } return (ret_status); }

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I guess! ECX is 32 bits CPU register! Options\Compiler\Advance code generation...\Instruction set 80386 up. TC20 only support up to 80286 which support 16 bits data. Change ECX to CX and test?