Fixing a poorly ZX-Spectrum (Part 5)
Now is the time to take the plunge and start cutting tracks. I suspect IC7 and IC16 (two RAM chips on D1) but first, taking a tip from “The Lil Old ZX Spectrum 48k Service Manual” I decided to start by eliminating the top 32K of RAM. The tools I used to perform this operation were a sharp modelling knife, a multimeter with continuity checker and my oscilloscope. Using the knife, I carefully cut the …