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Forums > C64 Coding > is a split sideborder scroll done before??
2008-11-13 14:51
Testa
Account closed

Registered: Oct 2004
Posts: 197
is a split sideborder scroll done before??

high party people.

the last days i was bussy with coding a sideborder split scroll. with a split scroll i simply mean a scroll that scrolls the left 20 chars to the left and the right 20 chars to the right. through the sideborders... smooth ofcourse and i only used sprites in the sideborder, so no ugly extented graphics...

not very hard to code but i had some fun... the question i have is this done before and is there a record.. my version holds 25 chars high, and you only can use one speed... it scrolls the whole picture one pixel each frame...

i am curious.
greetings,
Testa

 
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2008-11-13 20:51
Testa
Account closed

Registered: Oct 2004
Posts: 197
hehe yeah scout i know, according to your 1326 posts you are very active in the c64 scene.. i mean coding this old 8 bitter... but you already did know that... anyway i have send TIM a PM and i hope he has the time to make some nice graphics and i hope that you want to compose some weird tunes for me.... please....



2008-11-13 21:03
Scout

Registered: Dec 2002
Posts: 1570
Quote: hehe yeah scout i know, according to your 1326 posts you are very active in the c64 scene.. i mean coding this old 8 bitter... but you already did know that... anyway i have send TIM a PM and i hope he has the time to make some nice graphics and i hope that you want to compose some weird tunes for me.... please....





Well, 90% of those 1326 posts is nagging, nitpicking and about wishing back the old days =)
Yep, I'm an old sock. Hehehe :)

About the tunes: of course!
2008-11-13 21:14
Testa
Account closed

Registered: Oct 2004
Posts: 197
Quote: Well, 90% of those 1326 posts is nagging, nitpicking and about wishing back the old days =)
Yep, I'm an old sock. Hehehe :)

About the tunes: of course!


well i just say i love you!... but i still don't know if a split siderborder scroller is done before.....
2008-11-13 21:20
Oswald

Registered: Apr 2002
Posts: 5094
dont think so.
2008-11-14 21:07
Danzig

Registered: Jun 2002
Posts: 440
Hey Testa, still don't know if you mean something like in this:
Happy New Year 2008
[/url]

just a shitty 1x1-d016-split-borderscroller I did in 1993... definately your version sounds like pushing limits \ö/
2008-11-15 02:28
Testa
Account closed

Registered: Oct 2004
Posts: 197
yes Danzig something like that but i use another technique. .i ques you don't splitscroll any graphics at the bad line.. just a small charset 5 or 6 pixels high...
not the full 8 pixels so you can avoid badlines..

hint.. how do you want to split $d016 at the middle of the screen with openborders and 4 sprites at a badline??....
... wel you can't... still it is possible.. but i tell ya.. no splits at the badlines...



2008-11-15 06:02
Oswald

Registered: Apr 2002
Posts: 5094
hmm really, what happens if one splits d016 in the middle of a line ? :) fex. fineshift=0 on the left side then 7 in the middle then simply d021 comes through where the screen is "teared appart" ? :) is this possible with d011 or one of the known d011 effects will come alive, or nothing? :)
2008-11-15 10:53
doynax
Account closed

Registered: Oct 2004
Posts: 212
Quote: hmm really, what happens if one splits d016 in the middle of a line ? :) fex. fineshift=0 on the left side then 7 in the middle then simply d021 comes through where the screen is "teared appart" ? :) is this possible with d011 or one of the known d011 effects will come alive, or nothing? :)

I expect x scrolling works much like y scrolling or the sideborders. That is the register value is used simply to determine when to start a process, in this case on which sub-cycle in the left border to start clocking pixels through the display shift register.
In other words I don't expect changing the x fine-scroll in the middle of a scanline to change anything.
2008-11-15 12:34
WVL

Registered: Mar 2002
Posts: 902
Quote: Hey Testa, still don't know if you mean something like in this:
Happy New Year 2008
[/url]

just a shitty 1x1-d016-split-borderscroller I did in 1993... definately your version sounds like pushing limits \ö/


obviously this isnt a d016 split ;) but more like a rol/asl scroller. (it looks nice tho! :D)
2008-11-15 12:36
WVL

Registered: Mar 2002
Posts: 902
Quote: I expect x scrolling works much like y scrolling or the sideborders. That is the register value is used simply to determine when to start a process, in this case on which sub-cycle in the left border to start clocking pixels through the display shift register.
In other words I don't expect changing the x fine-scroll in the middle of a scanline to change anything.


Ofcourse it does :( How else do you think Cruzer made those rocking highres arrows in the lower border + 8 sprites in One Year Camelot III? Or the 41 column wide picture Soundemon made in Tense Years?
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