I was rifling through a box of old floppies last weekend when I found something that made me pause mid-dig: a copy of Math Blaster Episode I. That familiar yellow disk with its slightly bent corner transported me right back to 1992, sitting in front of our family's Tandy 1000 while mum made toast in the kitchen. The smell of warming CRT mixed with marmalade is oddly specific, but there you have it.See, back then…