Thanks, this could be it. The clock frequency was mighty 4.77 MHz and boy was it fast when you typed "DIR" :)

Ah good, it wasn’t just me that measured the increase in performance of 286 -> 386 -> 486 with DIR then!

For me it was watching pfs:Write do spell check, which of course involved a status box showing each word as it was checked to show just how fast computers are :-)

Haha, good old times :)