Almost OT: Pushbutton switch latching

Do you care what happens if two switches are pressed at once? In particular, do you care what the outputs are like during the time when both switches are pressed? Do you care what the state is like on powerup, before any switches are pressed?

My first cut would be to set up a bunch of R-S flipflops (each one being two cross-coupled NAND gates, probably). A switch would then drive low the S input for its flipflop and the R input for all other flipflops. (How this is done is more or less irrelevant. Personally, I'd probably put pullups on the inputs (omittable if they're true TTL, as opposed to something like HCT which is TTL-level but not real TTL) and then have each switch ground the cathode side of a diode matrix which then pulls the relevant inputs low. If you want to "do it right" you'd need a bunch of 8-input AND/NAND gates - you might even make the flipflops out of those, with one input of each flipflop dedicated to each switch.) If you care about power-up state I'd probably add some kind of discrete-component circuit to fake pressing a switch for a brief time during powerup. I can see a possible way to do it with a diode, a transistor, a resistor, and a capacitor.... Another possible solution is to feed the raw switch bits into a priority encoder chip, latch the resulting encoded bits, and feed the latch outputs into an N-to-one demux chip.