Date   : Fri, 02 Nov 2012 20:18:13 +0000
From   : pete@... (Pete Turnbull)
Subject: 6502 timing and zero-page instructions

On 02/11/2012 14:59, Jules Richardson wrote:
> 
> Does anyone know how many cycles it takes for a zero-page AND or ORA 
> instruction to complete on the 6502?

The original MOS Technology data sheets say 3 clock periods, except of
course for the indexed variants that take longer (4 or 6 cycles), as do
certain other zero-page instructions (ASL, LSR, ROL, ROR, INC, DEC all
take 5).  Ditto in the original (but later dated) Rockwell data sheets.

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York