Text # Carts

[TheHoboInYourRoom]

This might be a somewhat stupid question, but why is it that copies of the original nine games (and any subsequent releases of them) have only 23 pins, rather than 24, on their PCBs?

[PacManPlus]

Because they were only 2K (instead of 4K) and they didn't need the high address line.

[SeaGtGruff]

Because they were only 2K (instead of 4K) and they didn't need the high address line.

So that's how/why the 2600 found the vectors at $FFFA-$FFFB, $FFFC-$FFFD, and $FFFE-$FFFF, even when a 2K ROM began at $F000 (or $1000, or whatever)?

 

Michael

[TheHoboInYourRoom]

Because they were only 2K (instead of 4K) and they didn't need the high address line.

Ah. Thank you!