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Author Topic: 68k speed and sound lag through RuninUAE  (Read 5557 times)

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Offline Pat the Cat

Re: 68k speed and sound lag through RuninUAE
« on: December 26, 2016, 08:54:51 PM »
Ouch. From your screenies, you are set using a bog standard A4000 with 2MB of chip RAM and no fast RAM.

That's a crappy setting for games compatibility. For older games, try 512KB or 1MB of chip RAM, and 512KB or more of fast RAM.

If you can set Agnus type, 8372 is the magic number for a "classic" 1.3 Amiga, half mega of chip RAM, half megabyte "trapdoor" fast RAM. 8371 or earlier Agnus is half meg chip RAM at most. Rarely a very old game might insist on the older version, 8372 or up is 1MB or more chip RAM (and ECS and other video outputs with a Super Denise).

Bitmap Brothers just LOVED to hit hardware as hard as they could... heh heh... Chaos Engine I think had problems with 1Mb Chip RAM. It was developed on an A3000 (one of the few games that were, successfully) so I'd say very likely it expects some fast RAM. Could be wrong on that.
« Last Edit: December 26, 2016, 09:08:44 PM by Pat the Cat »
"To recurse is human. To iterate, divine."

A1200, Vanilla, Surf Squirrel, SD Card, KS 3.0/3.z, PCMCIA dev
A500, Vanilla, A570, Rev 5, KS 1.2/1.3 Testbench system
Rasp Pi, UAE4ARM, 3D laser scanner, experimental, hoping for AmigaOS4Arm, based on Watterott Fabscan Pi
 

Offline Pat the Cat

Re: 68k speed and sound lag through RuninUAE
« Reply #1 on: December 27, 2016, 04:03:26 PM »
(shrug) You cannot reasonably expect that a programmer in 1993 would  have a clue about the hardware their creation would be running on, a  quarter of a century ahead in time... if you try to match what you are  trying to emulate, you might just get results that work.

As  Windoze is "warranted for no purpose whatsoever", what were you  expecting? The points about PC horsepower needed is quite valid.  However, it strikes me that PCs have gradually moved backwards, in terms  of CPU speed needed to produce a useful tool. Microsoft's ability to  write slack code far exceeded Intels ambitions to make faster computers.  That's why todays Amiga emulators on PC are slower than they were say,  16 years ago.

Anyway, on a more positive note, if you try running some AGA games with that setup, you might have a better idea of what to expect. AGA versions are much more stressful for emulators, although they might not be the software you actually want to run... CD32 titles might be especially problematic, as that had hardware found in no other types of Amigas.

... It is nearly always a very good idea to choose your software first, when designing and building a system. Very important for testing out a emulation system, in what software you test with. :)
« Last Edit: December 27, 2016, 04:15:02 PM by Pat the Cat »
"To recurse is human. To iterate, divine."

A1200, Vanilla, Surf Squirrel, SD Card, KS 3.0/3.z, PCMCIA dev
A500, Vanilla, A570, Rev 5, KS 1.2/1.3 Testbench system
Rasp Pi, UAE4ARM, 3D laser scanner, experimental, hoping for AmigaOS4Arm, based on Watterott Fabscan Pi