Galaga 92 - problem!

amilo3438 · 25 January 2024, 14:52

Galaga '92 (1992)(Cool-G)(PD) - in The Zone!

WinUAE QS A500 1.3 ECS 512+512 configuration.

The problem = sprites objects not visible!

Chipset:
---------
OCS = objects visible
ECS Agnus = objects not visible
ECS Full = objects not visible
ECS Denise = objects visible

In HOL database it says ECS/OCS: https://amiga.abime.net/games/view/galaga-92

EDIT: QS A1200 with cache disabled and enhanced display = objects visible

EDIT2: If A500 ECS Agnus 1.3 512+512 and cycle-exact disabled = objects visible

Toni Wilen · 25 January 2024, 18:04

Seems to be broken game.

ECS (or AGA) combined with this is not a good idea:

00c0c5e6 48d6 000c movem.l d2-d3,(a6) == $00dff054

Writes to $dff054, $dff056, $dff058 and $dff05a. $dff05a does nothing if OCS. It is BLTCON0L if ECS/AGA, game is starting the blitter and then immediately clearing the minterm. Nothing gets blitted..

amilo3438 · 25 January 2024, 19:42

Thanks! (interesting when cycle-exact is disabled it works)

Toni Wilen · 25 January 2024, 20:01

Quote:

Originally Posted by amilo3438

Thanks! (interesting when cycle-exact is disabled it works)

It is not that interesting. When blitter is not in CE mode, it does the blit immediately, but reports blit as finished after a delay. (Only difference with immediate blitter is that delay is not zero)

25 January 2024, 14:52	#1
amilo3438 Amiga 500 User Join Date: Jun 2013 Location: EU Posts: 1,506	Galaga 92 - problem! Galaga '92 (1992)(Cool-G)(PD) - in The Zone! WinUAE QS A500 1.3 ECS 512+512 configuration. The problem = sprites objects not visible! Chipset: --------- OCS = objects visible ECS Agnus = objects not visible ECS Full = objects not visible ECS Denise = objects visible In HOL database it says ECS/OCS: https://amiga.abime.net/games/view/galaga-92 EDIT: QS A1200 with cache disabled and enhanced display = objects visible EDIT2: If A500 ECS Agnus 1.3 512+512 and cycle-exact disabled = objects visible Last edited by amilo3438; 25 January 2024 at 15:57.

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25 January 2024, 18:04	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,518	Seems to be broken game. ECS (or AGA) combined with this is not a good idea: 00c0c5e6 48d6 000c movem.l d2-d3,(a6) == $00dff054 Writes to $dff054, $dff056, $dff058 and $dff05a. $dff05a does nothing if OCS. It is BLTCON0L if ECS/AGA, game is starting the blitter and then immediately clearing the minterm. Nothing gets blitted..

25 January 2024, 19:42	#3
amilo3438 Amiga 500 User Join Date: Jun 2013 Location: EU Posts: 1,506	Thanks! (interesting when cycle-exact is disabled it works)

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