The answer to both is… yes. I could have tried to port, say, Actua Soccer to SCO Xenix, but I went with DOOM because the source is available, every detail is k

The answer to both is… yes. I could have tried to port, say, Actua Soccer to SCO Xenix, but I went with DOOM because the source is available, every detail is known, there’s a million different ports to learn from, there’s a reasonably clear separation of OS dependent and independent parts, everyone loves DOOM, it runs on any hardware, porting DOOM to platform X is almost a meme, … should I continue?