Penfold, R.A. <br/><br/>
An introduction to 6502 machine code  [Books]. 
R.A. Penfold and J.W. Penfold. 
 - Shepherds bush road, London  Bernard Babani pub.Ltd.  1984 
 - Pages: 107. 
<br/><br/><label>ISBN: </label>0859341224  0.00 
<br/><br/><label>Subjects--Personal Names: </label><br/>6502 (Microprocessor) -- Programming.
<br/><br/><label>Dewey Class. No.: </label>QA/76.8.S63  / PEN