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update BUGS file

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Jonathan Campbell 2015-02-05 06:57:55 -08:00
parent 94b67b9155
commit 20c1366cb4
1 changed files with 25 additions and 5 deletions
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BUGS/VGA emulation errors.txt
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@ -6,9 +6,28 @@ VGA BUG: Color palette error, last color of the palette, usually if it's white,
vertially: the failure appears as black splotches on his wings that SHOULD
be white.
NOTE: I'm not certain but I wonder if it has anything to do with the
previous demo effect and possible palette animation involved for
the "fading" effect as it renders. If I'm right, then whether or
not the error happens depends entirely on when the previous demo
effect ended and the state the color palette was left in.
================================================================================
THE FOLLOWING BUGS ARE FIXED!
================================================================================
VGA BUG: Exotic VRAM clearing tricks do not work, leaving "garbage" on the screen
- Abaddon: Cycling!
- Failure to clear the screen is visible when the VGA split-screen pans upward.
The "loading" graphic and other garbage contents are visible below the
animated VU meters where on real hardware that part of the screen would be
blank.
NOTE: This is still a problem with machine=svga_s3, but fixable by setting
machine=svga_et4000 instead. I'm not sure at this time whether the
demo has the same problems on real hardware or not.
- Surprise! productions, The Good, The Bad, & The Ugly
- There are two parts with rotating wireframe meshes that make use of VGA
palette trickry to create "motion blur". Failure to clear the screen results
@ -19,11 +38,11 @@ VGA BUG: Exotic VRAM clearing tricks do not work, leaving "garbage" on the scree
demo fails to clear the screen. Result: demo title with contents of the
previous screen or title screen around it, garbled due to palette mismatch.
- Abaddon: Cycling!
- Failure to clear the screen is visible when the VGA split-screen pans upward.
The "loading" graphic and other garbage contents are visible below the
animated VU meters where on real hardware that part of the screen would be
blank.
NOTE: This is still an issue with machine=svga_s3, but you can
eliminate the problem by setting machine=svga_et4000 or running
the demo from an MS-DOS 5.0 or 6.0 bootdisk. MS-DOS 6.22 may cause
stability issues. Windows 95/98 DOS mode is certain to cause the
demo to crash.
- Impact Studios: Legend
- Failure to clear the screen causes 3D dot fields to overdraw into an orange
@ -56,3 +75,4 @@ VGA BUG: Active display area cuts off right margin for Do Whacka Do
- Do Whacka Do works perfectly except that the rightmost 8-10 pixels are cut off,
which makes it a bit difficult to read the scroller at the bottom of the screen.