[stella] Studying River Raid Source.

[Thom Cherryhomes]

I am in the middle of studying the River Raid source code, and I am
wondering on something maybe relatively simple, but I do have to
ask....

I see the following in the graphic segment data:

...

; the data is stored for interlaced display:
FuelA:
       .byte $FE ; |XXXXXXX |
       .byte $DE ; |XX XXXX |
       .byte $DE ; |XX XXXX |

...

what is meant by "interlaced display" in this case? I know what an
interlaced picture is, but i'm not sure of the details for what is
being done in this context?

-Thom