two screen vertical on video con scroll oriz ?

Champion (452)

04-05-2011, 22:08

Hello, I made two different screen:
top screen is the vertical scroll
bottom screen is the screen latch

But how do I scroll horizontally between two separate screen
vertically?
+--------+----------+
| 1 scr | scr 2 | <= screen between two separate screen
+--------+----------+ but I can not to work ....

I used three VDP:
VDP-25, and VDP-26-27 <= hardware scroll
VDP-19 <= to set line before disable Interrupt.

Now how do I work two screen video on ?????

Note: This two-screen on screen 5 or 7 are useful for horizontal scrolling while the other screen to the right, you need the points and lives.

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Por Sonic_aka_T

Enlighted (4130)

04-05-2011, 22:17

While this is possible, it's very CPU intensive and very timing sensitive. I really wouldn't recommend trying this, as you're looking at maybe 80% CPU load just for the screen-split alone (it depends on the height). Essentially you'll need to tie up the CPU with 'do nothing' loops and VDP outs for the entire vertical 'duration' of your screen-split. It will also mean using instruction timings to 'accurately' time your split, which means any 'non-standard' CPU will mess things up, plus you'll need to write separate routines for 50Hz & 60Hz. Also, you may get artifact-ing while doing the actual split depending on how you plan things, and may get minor horizontal shifts if everything doesn't pan out just as you planned. I'd really recommend not using hardware scroll and using some other method to create your 'border' instead...

Por DanySoft

Champion (452)

04-05-2011, 22:27

Mah! With 50hz / 60hz worked two horizontal scrolling screen, but vertical was tested on msx Turbo R ?

Por DanySoft

Champion (452)

04-05-2011, 22:50

Then, we can use two screens (page1 and page2) on screen and scroll horizontal but down split-screen, are display the points and the lives ....

It 's very big this two screen page 1 and page 2!!

Por Edwin

Paragon (1182)

07-05-2011, 14:21

After reading the question twice, I still don't understand what it is. If you want a more helpful answer, please be a little clearer in what you want to know. Especially if you use a machine translation (common for Italian users) because those do make technical stuff undecipherable.

Por DanySoft

Champion (452)

07-05-2011, 15:20

I used Google translator from English into Italian.
okay?
Which site is more suitable for translation?

Por Edwin

Paragon (1182)

07-05-2011, 17:07

No translation sites are good at it. The best thing you can do is to give a better description of the effect you're trying to achieve. Maybe an example if you can find one.

Por wolf_

Ambassador_ (10096)

07-05-2011, 23:39

Or ask the question in Italian and let ARTRAG come to the rescue ..

Por ARTRAG

Enlighted (6933)

08-05-2011, 01:07

My guess: 99% of probability, independently by the language, the matter has no answer...

Por Daemos

Prophet (2052)

08-05-2011, 12:19

Perhaps. He is just simply trying to achieve the sonic effect. Maybe he likes to build a horizontal scrolling platform game that also can go up and down but tries to divide the level over two pages of VRAM. He likes to have a score bar etc on the right side of the screen (like roadfighter). Did I guess right Dannysoft?

Por flyguille

Prophet (3031)

08-05-2011, 16:50

I thinks he want a game for two players, left one player, right the other.