Re: Any more graceful way to saturate adds?

"Terence" <spamtrap@[EMAIL PROTECTED]
> wrote in message
news:55e84590-158c-4042-b75c-1bf284404b9d@[EMAIL PROTECTED]
> On Apr 13, 5:29 am, Robert Redelmeier <red...@[EMAIL PROTECTED]
> wrote:
>
> > CF is also set with two byte adds.
>
> But this never occurs with adding one byte to one bye in two-byte
> registers (with zero bits to the left). The objective is to count to
> no more than 254 since 255 itself is the overflow signal.
>

Do you like these two changes to "Terje's solution"?

  inc al
  adc dl,al ; Carry set if it overflows!
  sbb al,al ; AL = 0xff if overflow
  or dl,al ; Turns any overflow into 0xff


Rod Pemberton