diff options
Diffstat (limited to 'private/ntos/nthals/halws3/i386/w3detect.asm')
| -rw-r--r-- | private/ntos/nthals/halws3/i386/w3detect.asm | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/private/ntos/nthals/halws3/i386/w3detect.asm b/private/ntos/nthals/halws3/i386/w3detect.asm new file mode 100644 index 000000000..0a77c4b3b --- /dev/null +++ b/private/ntos/nthals/halws3/i386/w3detect.asm @@ -0,0 +1,106 @@ +;++ +; +; Copyright (c) 1991 Microsoft Corporation +; Copyright (c) 1993,1994 Sequent Computer Systems, Inc. +; +; Module Name: +; +; w3detect.asm +; +; Abstract: +; +; This module detects a Sequent WinServer 3000. It is included +; by w3ipi.asm and the setup program. It must assemble more or less +; standalone and run in protected mode. +; +; Author: +; +; Phil Hochstetler (phil@sequent.com) 3-30-93 +; +; Revision History: +; +;-- + +include callconv.inc + +_DATA SEGMENT DWORD PUBLIC 'DATA' + +; W3SystemType: SystemType is read from 0c80-0c83. +; +; 0c80-0c81: Compressed "TRI" (5 bit encoding). +; 0c82: System Board Type. +; 0c83: System Board Revision Level. + + +W3SystemTypeTable db 052h, 049h, 08h, 00h +W3SystemType db 5 dup(0) + +_DATA ends + + page ,132 +_TEXT SEGMENT DWORD PUBLIC 'CODE' + ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING + +;++ +; ULONG +; DetectWS3000( +; OUT PBOOLEAN IsConfiguredMp +; ); +; +; Routine Description: +; Determines the type of system (specifically for eisa machine), by reading +; the system board system ID. It compares the 4 bytes of the ID, to +; a predefined table <W3SystemTypeTable> and returns the index to the +; found entry. +; +; Arguments: +; IsConfiguredMp - If detected, then this value is +; set to TRUE if it's an MP system, else FALSE. +; +; Return Value: +; +; A value of 1 is returned if a WS3000 machine is detected. +; Otherwise a value of 0 is returned. +;-- +cPublicProc _DetectWS3000 ,1 +cPublicFpo 1, 3 + + push edi + push esi + push ebx ; Save C Runtime + + ; A 4 byte value is read from 0c80-0c83, and saved in <W3SystemType>. + ; This value is compared to the first 3 bytes of the value in + ; <W3SystemTypeTable>. + + cld ; set direction to forward + lea edi, W3SystemType + mov edx, 0c80h + insb ; 52h + inc edx + insb ; 49h + inc edx + insb ; 08h - System Board Type + inc edx + insb ; 00h - Revision Level + + xor eax, eax ; default to return failure + lea edi, W3SystemTypeTable ; Type Table + mov ecx, 3 ; bytes to compare against + lea esi, W3SystemType ; match string against table entry + repe cmpsb ; if (ecx == 0 and ZF set) + jnz @f ; we have a winner + inc al + mov ebx, dword ptr [esp+16] + mov byte ptr [ebx], 1 ; *IsConfiguredMp = TRUE + +@@: + pop ebx + pop esi + pop edi ; Restore C Runtime + + stdRET _DetectWS3000 + +stdENDP _DetectWS3000 + +_TEXT ENDS |