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title "EISA bus Support Assembley Code";++;; Copyright (c) 1989 Microsoft Corporation;; Module Name:;; eisaa.asm;; Abstract:;; This module implements the assembley code necessary to get configuration; information on EISA machines.;; Author:;; Shie-Lin Tzong (shielint) 7-June-1991;; Environment:;; Real Mode 16-bit code.;; Revision History:;;;--
.386p .xlistinclude hweisa.inc .list
_DATA SEGMENT PARA USE16 PUBLIC 'DATA'
public _FunctionInformation_FunctionInformation db 0 db EISA_INFORMATION_BLOCK_LENGTH dup (0)
_DATA ends
_TEXT SEGMENT PARA USE16 PUBLIC 'CODE' ASSUME CS: _TEXT
;++;; VOID; HwGetEisaSlotInformation (; PBTEISA_SLOT_INFORMATION SlotInformation,; UCHAR Slot; );; Routine Description:;; This function retrieves the slot information for the specified slot.;; Arguments:;; SlotInformation - Supplies a pointer to the structure which will; receive the slot information.;; Slot - Specifies the slot to retrieve the information.;; Return Value:;; None.;;--
HgesSlotInformation equ [bp + 4]HgesSlot equ [bp + 6]
public _HwGetEisaSlotInformation_HwGetEisaSlotInformation proc
push bp ; The following INT 15H destroies mov bp, sp ; ALL the general registers. push si push di push bx
mov cl, HgesSlot mov ax, GET_EISA_SLOT_INFORMATION int 15h
push bx ; Save revision level mov bx, HgesSlotInformation
; ; fill values into eisa slot info structure. ;
mov [bx].SlotReturn, ah mov [bx].SlotFlags, al pop ax ; [ax] = revision level mov [bx].SlotMajorRevision, ah mov [bx].SlotMinorRevision, al mov [bx].SlotChecksum, cx mov [bx].SlotNumberFunctions, dh mov [bx].SlotFunctionInformation, dl mov word ptr [bx].SlotCompressedId, di mov word ptr [bx+2].SlotCompressedId, si
pop bx pop di pop si pop bp ret
_HwGetEisaSlotInformation endp
;++;; UCHAR; HwGetEisaFunctionInformation (; PBTEISA_FUNCTION_INFORMATION FunctionInformation,; UCHAR Slot,; UCHAR Function; );; Routine Description:;; This function retrieves function information for the specified slot; and function.;; Arguments:;; FunctionInformation - Supplies a pointer to the structure which will; receive the slot information.;; Slot - Specifies the slot to retrieve the information.;; Function - Supplies the function number of the desired slot.;; Return Value:;; Return code of the EISA function call.;;--
HgefFunctionInformation equ [bp + 4]HgefSlot equ [bp + 6]HgefFunction equ [bp + 8]
public _HwGetEisaFunctionInformation_HwGetEisaFunctionInformation proc
push bp mov bp, sp push si
mov ax, GET_EISA_FUNCTION_INFORMATION mov cl, HgefSlot ; [cl] = slot, [ch]=function mov ch, HgefFunction mov si, HgefFunctionInformation ; (ds:si)->Function information int 15h
mov al, ah ; move the return code to AL
pop si pop bp ret_HwGetEisaFunctionInformation endp
;++;; BOOLEAN; HwIsEisaSystem (; VOID; );; Routine Description:;; This function determines if the target machines is EISA based machines.;; Arguments:;; None.;; Return Value:;; TRUE - if this is EISA machine. Otherwise, a value of FALSE is returned.;--
public _HwIsEisaSystem_HwIsEisaSystem proc
push es push bx
;; Check for an EISA system. If "EISA" is at F000:FFD9h then it; is an EISA system.;
mov ax,0f000h ; segment mov es,ax mov bx,0ffd9h ; offset in the ROM mov eax, "ASIE" cmp eax, es:[bx] jne short hies00 ; if ne, Not EISA system, go bies00
mov ax, 1 ; set return value to TRUE jmp short hies10
hies00: mov ax, 0hies10: pop bx pop es ret_HwIsEisaSystem endp
;++;; VOID; Int15 (; PULONG eax,; PULONG ebx,; PULONG ecx,; PULONG edx,; PULONG CyFlag; );; Routine Description:;; Calls Int15 with the requesed registers and returns the result;;--
public _Int15_Int15 proc push bp mov bp, sp push esi push edi push ebx
mov si, [bp+4] ; pointer to eax mov eax, [si]
mov si, [bp+6] ; pointer to ebx mov ebx, [si]
mov si, [bp+8] ; pointer to ecx mov ecx, [si]
mov si, [bp+10] ; pointer to edx mov edx, [si]
int 15h ; do it
mov si, [bp+4] ; pointer to eax mov [si], eax
mov si, [bp+6] ; pointer to ebx mov [si], ebx
mov si, [bp+8] ; pointer to ecx mov [si], ecx
mov si, [bp+10] ; pointer to edx mov [si], edx
sbb eax, eax mov si, [bp+12] ; pointer CyFlag mov [si], eax
pop ebx pop edi pop esi pop bp ret_Int15 endp
;++;; BOOLEAN; Int15E820 (; E820Frame *Frame; );;;; Description:;; Gets address range descriptor by calling int 15 function E820h.;; Arguments:;; Returns:;; BOOLEAN - failed or succeed.;;--
cmdpFrame equ [bp + 6]public _Int15E820_Int15E820 proc near
push ebp mov bp, sp mov bp, cmdpFrame ; (bp) = Frame push es push edi push esi push ebx
push ss pop es
mov ebx, [bp].Key mov ecx, [bp].DescSize lea di, [bp].BaseAddrLow mov eax, 0E820h mov edx, 'SMAP' ; (edx) = signature
INT 15h
mov [bp].Key, ebx ; update callers ebx mov [bp].DescSize, ecx ; update callers size
sbb ecx, ecx ; ecx = -1 if carry, else 0 sub eax, 'SMAP' ; eax = 0 if signature matched or ecx, eax mov [bp].ErrorFlag, ecx ; return 0 or non-zero
pop ebx pop esi pop edi pop es pop ebp ret
_Int15E820 endp
;++;; BOOLEAN; Int15E980 (; E820Frame *Frame; );;;; Description:;; Gets Geyserville information by calling INT 15 E980h;; Arguments:;; Returns:;; BOOLEAN - failed or succeed.;;--
cmdpFrame equ [bp + 6]public _Int15E980_Int15E980 proc near
push ebp mov bp, sp mov bp, cmdpFrame ; (bp) = Frame push es push edi push esi push ebx
push ss pop es
mov eax, 0E980h mov edx, 47534943h ; (edx) = signature 'GSIC'
INT 15h
sbb eax, eax ; eax = -1 if carry, else 0 not eax
; ; Pass back the information that the caller wanted ; mov [bp].CommandPortAddress, bx shr ebx, 16 mov [bp].CommandDataValue, bl mov [bp].EventPortAddress, cx shr ecx, 16 mov [bp].EventPortBitmask, cl mov [bp].MaxLevelAc, dh mov [bp].MaxLevelDc, dl shr edx, 16 mov [bp].PollInterval, dx
pop ebx pop esi pop edi pop es pop ebp ret
_Int15E980 endp
_TEXT ends end
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