Disposable Hero

[mtb]

The start screen of Disposable Hero seems to be not displayed correctly. I transferred the adf to a real amiga and it's ok.

[Amiga1992]

This is an emulator problem then. THread moved.

[Toni Wilen]

Known problem. Game horizontally splits the screen to two parts, lores and hires. This is not supported and won't be too soon.

[kremiso]

sorry for the necrobump, i haven't found nothing more recent about this split feature

does have been used only in Disposable Hero (main menu) ?

wondering if could be usable in some game too?

[hexaae]

WHDLoad of the game works fine, you just have to set immediate_blits true...
Well, to be exact there are a few minor glitches in the intro and white splash screen with logo is not fullscreen (never been sure if it's a cfg/emulation issue with WinUAE's overscan as the game switches res many times)

[rutra80]

Originally Posted by kremiso

sorry for the necrobump, i haven't found nothing more recent about this split feature

does have been used only in Disposable Hero (main menu) ?

wondering if could be usable in some game too?

Very interesting indeed. How is it done? Was it used anywhere else??

[ross]

Originally Posted by rutra80

Very interesting indeed. How is it done? Was it used anywhere else??

Copper changes BPLCON0 mid-screen for each video line.
Yes, there are other cases, especially in changing the number of bitplanes.

[rutra80]

Nice, lower-right quarter of screen is hires scroll and the rest is lores with ~40 colors. I wonder where else I can see this.

[kremiso]

crack intro or demo scene perhaps?

i was wondering if could be applied ingame, ie a map in hires and the game screen, togheter

seems complex, reading the ross explain

btw another lovely thing from the miggy magic cylinder

[amilo3438]

Originally Posted by kremiso

crack intro or demo scene perhaps?

Maybe this one: http://janeway.exotica.org.uk/release.php?id=19902

Originally Posted by ross

Yes, there are other cases, especially in changing the number of bitplanes.

Any examples? (Is there any demo example with such a case?)

[rutra80]

Originally Posted by kremiso

i was wondering if could be applied ingame, ie a map in hires and the game screen, togheter

Guess so, although it probably needs quite some pixels of separation for the switch...

Originally Posted by amilo3438

Maybe this one: http://janeway.exotica.org.uk/release.php?id=19902

Yeah, both horizontal and vertical four-split bonanza
BTW it once happened in this diskmag that mouse cursor got corrupted into a whole screen vertical stripe...

[ross]

Originally Posted by amilo3438

Any examples? (Is there any demo example with such a case?)

Of course I can't think of anything, but we did a lot of tests to fix this functionality in WinUAE (which works in almost all cases, at least in the existing ones..)
The problem is that the internal workings of Denise are not the same in all versions of the chip (the internal shifter behaves not exactly always the same); furthermore the possible combinations for the change of BPLCON0 are many, as are the possible positions within the fetch cycle of the bitplanes in which the change can take place.
So coders often try until it works

Originally Posted by kremiso

seems complex, reading the ross explain

It's not that complex, there are many cases in which with the copper you makes a 'vertical division' of the screen for some effect (even more than one for that matter).
The problem is that in any case it is expensive and may not work as you expect when changing BPLCON0...

Originally Posted by rutra80

Guess so, although it probably needs quite some pixels of separation for the switch...

It is not so simple, there is not an exact 'pixel separation for the switch'.
The chipset designers definitely hadn't thought it was something to do or support.

[kremiso]

wasn't Fire and Ice doing something similar?
wasn't the lower map displayed in different res?

[rutra80]

Nope, Fire & Ice is all lores. It's a vertical split anyway which is trivial and seen a lot - you can even do this in Workbench by dragging screens.

[kremiso]

Originally Posted by rutra80

Nope, Fire & Ice is all lores. It's a vertical split anyway which is trivial and seen a lot - you can even do this in Workbench by dragging screens.

thank you for the correction
the res thing alone was leading me out of track

def the each line split is the 'uncommon' thing, and i can understand expensive to be implemented in an effective playable environment
maybe on a fat hardware

[giantclam]

OT 'coz it's not winuae ...just demonstrating 'no problems here' ..with amiberry =)

[rutra80]

WinUAE handles this now too, original post is from 2003!

[rutra80]

Pinball Fantasies menu seems to use it too.

[kremiso]

Originally Posted by rutra80

Pinball Fantasies menu seems to use it too.

in the main menu screen, with the game logo on the left, and the pinball tables/ hiscore to the right?

[rutra80]

Yes the table choice screen is 16 colour lores logos on the left, and on the right there are two 16 colour hires table choosers. Not sure about hiscore and credits - they look loresish...