The MikeOS API documentation

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==================================================================
         MikeOS -- The Mike Operating System kernel
                       MATH ROUTINES
==================================================================

os_bcd_to_int

Converts binary coded decimal number to an integer

IN: AL = BCD number
OUT: AX = integer value

Example:

mov al, 00010110b            ; 0001 0110 = 16(decimal) or 0x10h in BCD
call os_bcd_to_int 
     
; ax now contains the 16 bit integer 00000000 00010000b

os_long_int_negate

Multiply value in DX:AX by -1

IN: DX:AX = long integer
OUT: DX:AX = -(initial DX:AX)

Example:

mov dx, 0x01
mov ax, 0x45
call os_long_int_negate

; DX now contains 0xFFFF
; and AX 0xFEBB

RETURN TO MAIN PAGE

================================================================== MikeOS -- The Mike Operating System kernel MATH ROUTINES ==================================================================

os_bcd_to_int

os_long_int_negate