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EnigmA Amiga Run 1998 July
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EnigmA AMIGA RUN 29 (1998)(G.R. Edizioni)(IT)[!][issue 1998-07 & 08].iso
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warpup1.lha
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WarpUP-WarpOS
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voxel_english.readme
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1997-12-24
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Voxelspace-Problems 18.8.97 by Sam Jordan
---------------------------------------------
The voxelspace demo is a highly optimized demonstration of the
PowerPC processor and of the fast graphics display, too. There
were a lot of new techniques tested which could become established
in the future. Therefore, at this time, problems can occur dependant
of the hardware and software configuration. The voxelspace demo
now offers some options which can be used to bypass such problems.
The most important parameters which can cause problems:
'm' : This parameter enables a 'MMU-hack' for the 68K processor
(68040/68060 only). This option allows the access to the
68K-MMU in a completely non-system-compliant way and can
therefore cause many problems. Until now there were reported
complete hang-ups of the systems and problems with the CSPPC-
SCSI controller. This parameter has absolutely
no influence on the performance of the PowerPC, so it can
be omitted, if only the PPC performance plays a role.
'g' : This option enables the direct graphics board access. In this
mode the frame is created directly in the frame buffer
(TURBOGFX mode).
By default, the demo tries to access the bitmap as system-
compliant as possible, so the bitmap is locked and unlocked
using the functions of the 'cybergraphics.library'. Nevertheless
problems can occur in this mode, especially on different
graphics boards.
'nl' : This parameter only plays a role when 'g' is enabled and 'mo'
is disabled. It disables the lockint/unlocking of the bitmap
in TURBOGFX-mode. If the option 'g' causes problems, the
combination 'g nl' should be tried out.
'mo' : This parameter only plays a role when 'g' is enable. The address
of the bitmap is then evaluated using an alternative method.
The standard method was broken on some older versions of
CyberGFX, so if problems occur, the combination 'g mo' should
be tried out.
'c' : This parameter only plays a role, when 'g' is disabled. This
enables the standard method of graphics board access, but
additionally, 'Multibuffering' ist used. This can cause
problems if certain commodities run in the background, i.e
blanker.
'w' : This parameter enables the options 'm', 't' and 'g'. In the
case that one of these options doesn't work, the parameter
'w' should not be used.
NEW: Since V1.6, the voxelspace demo supports the OS3.0 multibuffering with
P96 (only if P96 is installed). Therefore an appropriate new version of
P96 has to be installed so that the demo still works with the modes
WARP/TURBOGFX and CGFXPLUS.
Finally I want to mention a known problem when using multibuffering
with CyberGFX. Crashs can occur, if the mousebuttons are pressed.
Usually some commodities are responsible for these problems. In this
case these commodities should be disabled or the voxelspace demo
should be startet without the parameters 'w', 'c' and 'g'.