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SebRmv

Les Branchs Objects?

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SebRmv    2

bug dans la doc Atari ou c'est moi qui suis fou?

 

page 20 du tech ref manual

 

on lit pour les branch objects

 

Bits 14-15 : CC : 0 - O_BREQ, 1 - O_BRGT, 2 - O_BRLT, 3 - O_BROP, 4 ?!? - O_BRHALF

 

mais 2 bits, ça fait de 0 à 3 donc le 4 ils l'ont fumé ou quoi?

 

Seb

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Orion_    1

en parlant de branch object, ça serais possible d'avoir un peu plus d'explication sur les fameux 2 branch object qu'il faut avoir en debut de liste d'apres toi ?

ça donne quoi probleme visuellement si on a pas ces 2 branch object ?

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GT Turbo    3

[french]

 

Bits 14-15 : CC : 0 - O_BREQ, 1 - O_BRGT, 2 - O_BRLT, 3 - O_BROP, 4 ?!? - O_BRHALF

 

mais 2 bits, ça fait de 0 à 3 donc le 4 ils l'ont fumé ou quoi?

 

Seb

 

Bug de la doc, perso sur ma doc j'ai bit 14-16 ce qui fait 3 bits, donc c'est bon et cela est correct sinon mon gestionnaire de sprites ne fonctionnerais pas ;)

 

 

[english]

 

Bits 14-15 : CC : 0 - O_BREQ, 1 - O_BRGT, 2 - O_BRLT, 3 - O_BROP, 4 ?!? - O_BRHALF

 

but 2 bits, that only gives 4 possibilities, so what's with the 4 ?

 

Seb

 

Seb, i my doc that's bit 14-16, and that's OK i use it in my sprite manager

 

 

GT :poulpe:

 

 

[french]

 

en parlant de branch object, ça serais possible d'avoir un peu plus d'explication sur les fameux 2 branch object qu'il faut avoir en debut de liste d'apres toi ?

ça donne quoi probleme visuellement si on a pas ces 2 branch object ?

 

Ces deux branch objects permettent d'arreter le décodage de ta liste si Ypos est inférieur ou supérieur au VC (Compteur vertical), visuellement si tu les a pas, certains sprites peuvent perdre des lignes, quand tu as plusieurs sprites cela se vois pas, mais essaie avec un, la première fois que j'ai affiché une liste sans ces deux bras, mon premier avait quelques lignes en moins au début de celui ci

 

[english]

 

About branch objects, can i have some explanations about the two in the beginnning of the list ?

What got on the screen, if they're not in ?

 

This two branch objects can stop the list display if the Ypos is greater or lower than the VC (Vertical Counter), if you try to display a OP list without them, some sprites can lost some lines.

 

 

GT :poulpe:

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SebRmv    2

euh, sorry GT, but do you REALLY use O_BRHALF branch objects ?

 

if not, this makes absolutely no difference to say it is bits 14-15 or 14-16...

 

moreover, my doc is more recent than yours (28 february 2001) so I doubt they volontarily introduce this bug at the documentaztion level ...

 

Seb

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GT Turbo    3
euh, sorry GT, but do you REALLY use O_BRHALF branch objects ?

 

if not, this makes absolutely no difference to say it is bits 14-15 or 14-16...

 

moreover, my doc is more recent than yours (28 february 2001) so I doubt they volontarily introduce this bug at the documentaztion level ...

 

Seb

 

You're right Seb, no O_BRHALF objects in my sprite manager. But bit 14 until 16 give 3 bits so 0 to 7 is possible to have a 4. Bit 14 until 15 give as you has said, 0 to 3 so no 4 ;)

 

 

GT :poulpe:

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SebRmv    2

ok, but there is also the possibility that O_BRHALF does not exist!!

(you know Atari and their bugs)

 

Seb

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GT Turbo    3
ok, but there are also the possibility that O_BRHALF does not exist!!

(you know Atari and their bugs)

 

Seb

 

 

Yes , Atari docs and bugs for people who have nothing to do :blink:

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Orion_    1

mmh, I readed fastly the doc about branch object and didn't really understand how to set condition like the Y <> VCpos, but I will try to look at it next week (when I will have more free time)

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SCPCD    0
ok, but there is also the possibility that O_BRHALF does not exist!!

(you know Atari and their bugs)

 

Seb

It seems that it was a mistake in the Jag_V8 doc.

In TOM's netlist, the OP understand this cc.

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