89 lines
3.8 KiB
NASM
89 lines
3.8 KiB
NASM
|
;**************************************************************************
|
||
|
|
;* MEMMAN.ASM
|
||
|
|
;*
|
||
|
|
;* Returns information about the VMM.
|
||
|
|
;*
|
||
|
|
;**************************************************************************
|
||
|
|
|
||
|
|
INCLUDE TOOLPRIV.INC
|
||
|
|
|
||
|
|
|
||
|
|
sBegin CODE
|
||
|
|
assumes CS,CODE
|
||
|
|
|
||
|
|
; MemManInfo
|
||
|
|
;
|
||
|
|
; Returns information through DPMI about the VMM
|
||
|
|
|
||
|
|
cProc MemManInfo, <PUBLIC,FAR>, <si,di,ds>
|
||
|
|
parmD lpMemMan
|
||
|
|
localV DPMIBuffer,30h ;30h byte buffer for DPMI info
|
||
|
|
cBegin
|
||
|
|
mov ax,_DATA ;Get our data segment
|
||
|
|
mov ds,ax
|
||
|
|
|
||
|
|
;** Fill the buffer with -1 so if the call messes up like
|
||
|
|
;** in 3.0 std mode we get the correct results
|
||
|
|
push ss ;Point to the local variable block
|
||
|
|
pop es
|
||
|
|
lea di,DPMIBuffer ;Get offset of buffer
|
||
|
|
mov cx,30h ;Max len of DPMI buffer
|
||
|
|
mov al,0ffh ;-1
|
||
|
|
rep stosb ;Fill buffer
|
||
|
|
|
||
|
|
;** Prepare to build public structure
|
||
|
|
mov ax,0500h ;DPMI -- Get Free Memory Info
|
||
|
|
lea di,DPMIBuffer ;Get offset of buffer
|
||
|
|
int 31h ;Call DPMI
|
||
|
|
jnc MMI_10 ;Success
|
||
|
|
xor ax,ax ;Return FALSE
|
||
|
|
jmp MMI_End ;Get out because of DPMI error
|
||
|
|
MMI_10: lds si,lpMemMan ;Point to the MEMMANINFO structure
|
||
|
|
|
||
|
|
;** Fill MEMMANINFO structure
|
||
|
|
mov ax,es:[di+0] ;Loword of largest free block
|
||
|
|
mov WORD PTR [si].vmm_dwLargestFreeBlock,ax
|
||
|
|
mov ax,es:[di+2] ;High word
|
||
|
|
mov WORD PTR [si].vmm_dwLargestFreeBlock + 2,ax
|
||
|
|
mov ax,es:[di+4] ;Loword of largest unlockable block
|
||
|
|
mov WORD PTR [si].vmm_dwMaxPagesAvailable,ax
|
||
|
|
mov ax,es:[di+6] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwMaxPagesAvailable + 2,ax
|
||
|
|
mov ax,es:[di+8] ;Loword of largest lockable page
|
||
|
|
mov WORD PTR [si].vmm_dwMaxPagesLockable,ax
|
||
|
|
mov ax,es:[di+0ah] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwMaxPagesLockable + 2,ax
|
||
|
|
mov ax,es:[di+0ch] ;Loword of linear address space
|
||
|
|
mov WORD PTR [si].vmm_dwTotalLinearSpace,ax
|
||
|
|
mov ax,es:[di+0eh] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwTotalLinearSpace + 2,ax
|
||
|
|
mov ax,es:[di+10h] ;Loword of number of unlocked pages
|
||
|
|
mov WORD PTR [si].vmm_dwTotalUnlockedPages,ax
|
||
|
|
mov ax,es:[di+12h] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwTotalUnlockedPages + 2,ax
|
||
|
|
mov ax,es:[di+14h] ;Loword of number of free pages
|
||
|
|
mov WORD PTR [si].vmm_dwFreePages,ax
|
||
|
|
mov ax,es:[di+16h] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwFreePages + 2,ax
|
||
|
|
mov ax,es:[di+18h] ;Loword of total physical pages
|
||
|
|
mov WORD PTR [si].vmm_dwTotalPages,ax
|
||
|
|
mov ax,es:[di+1ah] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwTotalPages + 2,ax
|
||
|
|
mov ax,es:[di+1ch] ;Loword of free lin addr space (pages)
|
||
|
|
mov WORD PTR [si].vmm_dwFreeLinearSpace,ax
|
||
|
|
mov ax,es:[di+1eh] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwFreeLinearSpace + 2,ax
|
||
|
|
mov ax,es:[di+20h] ;Loword of size of paging file (pages)
|
||
|
|
mov WORD PTR [si].vmm_dwSwapFilePages,ax
|
||
|
|
mov ax,es:[di+22h] ;Hiword
|
||
|
|
mov WORD PTR [si].vmm_dwSwapFilePages + 2,ax
|
||
|
|
mov [si].vmm_wPageSize,4096 ;Safe to hard code this for 386/486
|
||
|
|
mov ax,TRUE ;Return TRUE
|
||
|
|
|
||
|
|
MMI_End:
|
||
|
|
|
||
|
|
cEnd
|
||
|
|
|
||
|
|
sEnd
|
||
|
|
END
|