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;++;;Module Name:;; olidtect.c;;Abstract:;; This modules implements the machine type detection.;;Author:;;;;Environment:;; Kernel mode only.;;Revision History:;;--.386p
include callconv.inc
_TEXT SEGMENT DWORD PUBLIC 'CODE' ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
;++; BOOLEAN; DetectOlivettiMp (; OUT PBOOLEAN IsConfiguredMp; );;; Routine Description:; Determines the type of system (specifically for eisa machines), by reading; the system board ID.;; Arguments:; IsConfiguredMp - If LSX5030/40/40E is detected, then this value is; set to TRUE if more than one CPU is found, else FALSE.; The effect is that on returning FALSE, the standard HAL; is used, whilst on returning TRUE, the LSX5030 HAL is used.;; Return Value:; TRUE (non-zero in eax): LSX5030/40/40E detected; FALSE (zero in eax): non-LSX5030 detected;;--cPublicProc _DetectOlivettiMp,1
; 3 byte value is read from 0c80-0c82
mov edx, 0c80h in al, dx cmp al, 3dh ; Manufacturer Code - 1st byte jne NotAnLSX5030 inc edx in al, dx cmp al, 89h ; Manufacturer Code - 2nd byte jne NotAnLSX5030 inc edx in al, dx cmp al, 03h ; Product Number part 1 jne NotAnLSX5030 ;inc edx ;in al, dx ;and al, 0f8h ; 5-bit Product Number part 2 ;cmp al, 10h ;jne NotAnLSX5030
;; Detect Processor Type reading Product Number part 2; Mask out Id's different from Cxh and Dxh; mov edx, 0c8bh in al, dx and al, 0e0h cmp al, 0c0h je AnLSX5030
NotAnLSX5030: mov eax, 0 stdRET _DetectOlivettiMp
AnLSX5030:
mov edx, dword ptr [esp+4] ; get the address of IsConfiguredMp mov byte ptr [edx], 1 ; *IsConfiguredMp = TRUE mov eax, 1
stdRET _DetectOlivettiMp
stdENDP _DetectOlivettiMp
_TEXT ENDS
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