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Piotr

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Converting diskette LBA to CHS

// description of your code here

Put LBA address in AX and get your results in CL, CH and DH.

   1  
   2  ;-----------------------------------------------------------------------------;
   3  ;		DISKETTE_LBA_TO_CHS(AX LBA) CL Head, CH Cylinder, DH Sector   ;
   4  ;-----------------------------------------------------------------------------;
   5  diskette_lba_to_chs:
   6  	xor dx, dx
   7  	mov bx, 18
   8          div bx
   9  	push dx				; = Stack(1)			
  10  	mov dx, ax
  11          shr ax, 2
  12  	mov cl, al
  13  	mov ch, dl
  14  	pop dx				; = Stack(0)
  15  	inc dl
  16  	mov dh, dl
  17  	ret
to assembler lba floppy by darktemplar on Dec 11, 2006

[ASM]Write String only using BIOS

First, set starting address of text into DS:SI registers. Procedure writes text until null-character is met.
   1  
   2  ;-----------------------------------------------------------------------------;
   3  ;		WRITE_STRING(DS:SI Text)                                      ;
   4  ;-----------------------------------------------------------------------------;
   5  ;	Writes string from DS:SI until character #0 is met		      ;
   6  Write_String:		
   7  	mov ah, 0xE	
   8  	xor bh, bh	
   9  	mov bl, 0x7
  10  .nextchar	
  11  	lodsb		
  12  	or al,al
  13  	jz .return
  14  	int 10h	
  15  	jmp .nextchar
  16  .return		
  17  	ret	
  18
to print assembler write bios by darktemplar on Dec 11, 2006
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