WebSVN – Kolibri OS – Diff – /kernel/trunk/fs/fs_lfn.inc



fs_HasRamdisk:
        mov     al, 1   ; we always have ramdisk
        ret

 
fs_HasFloppy:
        cmp     byte [DRIVE_DATA], 0
        setnz   al

        ret
 
fs_HasHd0:
        mov     al, [DRIVE_DATA+1]
        and     al, 11000000b
        cmp     al, 01000000b
        setz    al
        ret
fs_HasHd1:
        mov     al, [DRIVE_DATA+1]
        and     al, 00110000b
        cmp     al, 00010000b
        setz    al
        ret
fs_HasHd2:
        mov     al, [DRIVE_DATA+1]
        and     al, 00001100b
        cmp     al, 00000100b
        setz    al
        ret
fs_HasHd3:
        mov     al, [DRIVE_DATA+1]
        and     al, 00000011b
        cmp     al, 00000001b

        setz    al
        ret
 
;*******************************************************
fs_HasCd0:
        mov     al, [DRIVE_DATA+1]
        and     al, 11000000b
        cmp     al, 10000000b
        setz    al
        ret
fs_HasCd1:
        mov     al, [DRIVE_DATA+1]
        and     al, 00110000b
        cmp     al, 00100000b
        setz    al
        ret
fs_HasCd2:
        mov     al, [DRIVE_DATA+1]
        and     al, 00001100b
        cmp     al, 00001000b
        setz    al
        ret
fs_HasCd3:
        mov     al, [DRIVE_DATA+1]
        and     al, 00000011b
        cmp     al, 00000010b

        clc
@@:
        ret

 
fs_NextFloppy:
; we have /fd/1 iff (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0)
        test    byte [DRIVE_DATA], 0xF0
        jz      .no1
        test    eax, eax
        jnz     .no1
        inc     eax
        ret     ; CF cleared
.no1:
        test    byte [DRIVE_DATA], 0x0F
        jz      .no2
        cmp     al, 2
        jae     .no2
        mov     al, 2

        jmp     fs_NextHd
fs_NextHd3:
        push    3
fs_NextHd:
        pop     ecx
        movzx   ecx, byte [DRIVE_DATA+2+ecx]
        cmp     eax, ecx
        jae     fs_NextFloppy.no2
        inc     eax
        clc
        ret

Rev 321	Rev 381
Line 550...	Line 550...
550	fs_HasRamdisk:	550	fs_HasRamdisk:
551	mov al, 1 ; we always have ramdisk	551	mov al, 1 ; we always have ramdisk
552	ret	552	ret
Line 553...	Line 553...
553		553
554	fs_HasFloppy:	554	fs_HasFloppy:
555	cmp byte [0x40000], 0	555	cmp byte [DRIVE_DATA], 0
556	setnz al	556	setnz al
Line 557...	Line 557...
557	ret	557	ret
558		558
559	fs_HasHd0:	559	fs_HasHd0:
560	mov al, [0x40001]	560	mov al, [DRIVE_DATA+1]
561	and al, 11000000b	561	and al, 11000000b
562	cmp al, 01000000b	562	cmp al, 01000000b
563	setz al	563	setz al
564	ret	564	ret
565	fs_HasHd1:	565	fs_HasHd1:
566	mov al, [0x40001]	566	mov al, [DRIVE_DATA+1]
567	and al, 00110000b	567	and al, 00110000b
568	cmp al, 00010000b	568	cmp al, 00010000b
569	setz al	569	setz al
570	ret	570	ret
571	fs_HasHd2:	571	fs_HasHd2:
572	mov al, [0x40001]	572	mov al, [DRIVE_DATA+1]
573	and al, 00001100b	573	and al, 00001100b
574	cmp al, 00000100b	574	cmp al, 00000100b
575	setz al	575	setz al
576	ret	576	ret
577	fs_HasHd3:	577	fs_HasHd3:
578	mov al, [0x40001]	578	mov al, [DRIVE_DATA+1]
579	and al, 00000011b	579	and al, 00000011b
580	cmp al, 00000001b	580	cmp al, 00000001b
Line 581...	Line 581...
581	setz al	581	setz al
582	ret	582	ret
583		583
584	;*******************************************************	584	;*******************************************************
585	fs_HasCd0:	585	fs_HasCd0:
586	mov al, [0x40001]	586	mov al, [DRIVE_DATA+1]
587	and al, 11000000b	587	and al, 11000000b
588	cmp al, 10000000b	588	cmp al, 10000000b
589	setz al	589	setz al
590	ret	590	ret
591	fs_HasCd1:	591	fs_HasCd1:
592	mov al, [0x40001]	592	mov al, [DRIVE_DATA+1]
593	and al, 00110000b	593	and al, 00110000b
594	cmp al, 00100000b	594	cmp al, 00100000b
595	setz al	595	setz al
596	ret	596	ret
597	fs_HasCd2:	597	fs_HasCd2:
598	mov al, [0x40001]	598	mov al, [DRIVE_DATA+1]
599	and al, 00001100b	599	and al, 00001100b
600	cmp al, 00001000b	600	cmp al, 00001000b
601	setz al	601	setz al
602	ret	602	ret
603	fs_HasCd3:	603	fs_HasCd3:
604	mov al, [0x40001]	604	mov al, [DRIVE_DATA+1]
605	and al, 00000011b	605	and al, 00000011b
606	cmp al, 00000010b	606	cmp al, 00000010b
Line 622...	Line 622...
622	clc	622	clc
623	@@:	623	@@:
624	ret	624	ret
Line 625...	Line 625...
625		625
626	fs_NextFloppy:	626	fs_NextFloppy:
627	; we have /fd/1 iff (([0x40000] and 0xF0) != 0) and /fd/2 iff (([0x40000] and 0x0F) != 0)	627	; we have /fd/1 iff (([DRIVE_DATA] and 0xF0) != 0) and /fd/2 iff (([DRIVE_DATA] and 0x0F) != 0)
628	test byte [0x40000], 0xF0	628	test byte [DRIVE_DATA], 0xF0
629	jz .no1	629	jz .no1
630	test eax, eax	630	test eax, eax
631	jnz .no1	631	jnz .no1
632	inc eax	632	inc eax
633	ret ; CF cleared	633	ret ; CF cleared
634	.no1:	634	.no1:
635	test byte [0x40000], 0x0F	635	test byte [DRIVE_DATA], 0x0F
636	jz .no2	636	jz .no2
637	cmp al, 2	637	cmp al, 2
638	jae .no2	638	jae .no2
639	mov al, 2	639	mov al, 2
Line 655...	Line 655...
655	jmp fs_NextHd	655	jmp fs_NextHd
656	fs_NextHd3:	656	fs_NextHd3:
657	push 3	657	push 3
658	fs_NextHd:	658	fs_NextHd:
659	pop ecx	659	pop ecx
660	movzx ecx, byte [0x40002+ecx]	660	movzx ecx, byte [DRIVE_DATA+2+ecx]
661	cmp eax, ecx	661	cmp eax, ecx
662	jae fs_NextFloppy.no2	662	jae fs_NextFloppy.no2
663	inc eax	663	inc eax
664	clc	664	clc
665	ret	665	ret

Subversion Repositories Kolibri OS

(root)/kernel/trunk/fs/fs_lfn.inc – Rev 321 → 381