Was that the Spectrum magazine article that claimed the Spectrum was actually a Spectrum Plus under the hood, and all that was required was to poke in the print

Was that the Spectrum magazine article that claimed the Spectrum was actually a Spectrum Plus under the hood, and all that was required was to poke in the printed page of machine code - in hex, mind you - to unleash it's glorious abilities. A couple of hours of typing later, and the big red 'April Fools' message appears...