The first x86 system I had was a hand me down 286. The parallel port on the motherboard was only unidirectional, so I modified it to be bidirectional by solder

The first x86 system I had was a hand me down 286. The parallel port on the motherboard was only unidirectional, so I modified it to be bidirectional by soldering a bodge wire between the output enable signal on one of the 74LS374 (I think) and the other control register. Ah, old systems were so hackable in the 1980s prior to the mass migration to large scale SoCs.