[atari7800] AW: Questions about character/indirect mode

> I understand that for direct mode your graphics must be stored upside down
> and separated by a page. Does character mode act the same way?
Right.

> I did a disassembly on Ms. Pac-man and the characters in this game are not
stored
> upside down and they are stored similarly to the 2600 or A8. Here is an
> example of the letter A...
Don't know why they did it that way, maybe they copy converted gfx to ram?

> I also assume you can combine character and direct modes in the same zone.
> I get this from the programming doc where it states..."Indirect mode, when
> selected, only lasts as long as the corresponding header is being
> processed." Is this a correct assumption?
Yep, no problem.

> I'd think one would do this so
> character mode could be used for a background (i.e. the dots and maze in
> Ms. Pac-man) and direct mode for your sprites.
This is the best way I guess.

Have fun
Matthias

> -----Ursprüngliche Nachricht-----
> Von: atari7800-bounce@xxxxxxxxxxxxx [mailto:atari7800-
> bounce@xxxxxxxxxxxxx] Im Auftrag von Dennis Debro
> Gesendet: Freitag, 29. April 2005 14:50
> An: atari7800@xxxxxxxxxxxxx
> Betreff: [atari7800] Questions about character/indirect mode
> 
> Hi there,
> 
> I understand that for direct mode your graphics must be stored upside down
> and separated by a page. Does character mode act the same way? I did a
> disassembly on Ms. Pac-man and the characters in this game are not stored
> upside down and they are stored similarly to the 2600 or A8. Here is an
> example of the letter A...
> 
>    .byte $3F ; |..XXXXXX| $C114
>    .byte $33 ; |..XX..XX| $C115
>    .byte $3F ; |..XXXXXX| $C116
>    .byte $33 ; |..XX..XX| $C117
>    .byte $33 ; |..XX..XX| $C118
> 
> I also assume you can combine character and direct modes in the same zone.
> I get this from the programming doc where it states..."Indirect mode, when
> selected, only lasts as long as the corresponding header is being
> processed." Is this a correct assumption? I'd think one would do this so
> character mode could be used for a background (i.e. the dots and maze in
> Ms. Pac-man) and direct mode for your sprites.
> 
> Take care,
> Dennis
>

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