[2222] in comp.os.os2.announce archive
BETA: Ver 0.52 of Stella, an Atari VCS emulator (update)
daemon@ATHENA.MIT.EDU (Darrell Spice Jr)
Thu Dec 19 15:10:21 1996
To: os2ann.DISCUSS@bloom-picayune.MIT.EDU
Date: 18 Dec 1996 22:35:54 GMT
From: spice@ibm.net (Darrell Spice Jr)
Reply-To: spice@ibm.net
Reply-to: spice@ibm.net
---------------------------------------------------------------------
Version 0.52 of Stella is now available on the SpiceWare home page. It should
appear on the Stella home page within the next couple of days.
Support added to show the core Stella errors. These errors would cause the
prior OS/2 version of Stella, if a core error occurred, to abort without
displaying any error message. Core errors are errors such as "missing *.BIN
file".
Fix bug in frame rate calculation which caused fps to be overstated(ie: if it
said 30fps, you actually were getting 27fps).
Revised frame rate routine to calculate fps once per second instead of every
frame. This caused an increase in the frame rate(even after fixing the frame
rate calc bug). For me, games that achieved 30fps (really 27fps) on ver 0.5.1
are now getting 45fps on ver 0.52! I guess accessing the system clock used up
a lot of CPU time.
Revised frame skipping method so that games needing to flicker (such as the
missiles in Space Invaders, Pac Man ghosts, Match in Haunted House, etc) will
show objects that only appear every other frame. Pac Man is based on every
4th frame (that's why the ghosts flicker so badly on the original Atari), so
you need to achieve at least 15 fps on Pac Man to see all 4 ghosts.
Darrell Spice Jr.
- Porting STELLA, an Atari VCS/2600 emulator to OS/2
for more info visit the SpiceWare home page
http://www.geocities.com/SiliconValley/Pines/2281
or the Stella homepage
http://www4.ncsu.edu/~bwmott/www/2600/
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