Richard Ross-Langley About Roles Name : Richard Ross-Langley Book Role Spectrum Machine Code Reference Guide, The Author Guia Practica del Programador en Codigo Maquina del Spectrum Author Change Request You can request changes or additions here. You can upload files. All change requests are actioned as quickly as possible and you will be informed of the result. Details Files Your Name * Email * Details Your browser doesn't have Flash, Silverlight or HTML5 support. Submit Thank you for your change request. We will respond as soon as possible.