home *** CD-ROM | disk | FTP | other *** search
-
- A.I.B.B.
- Amiga Intuition Based Benchmarks
- Program Release Version 6.5
- Copyright 1991-1993 LaMonte Koop
- All Rights Reserved
-
-
- Recent updates to both the Amiga's hardware and operating system make
- careful attention necessary when doing performance comparisons. The
- most prevalent items of attention which can affect a systems rating are the
- new AGA graphics chips, and the inclusion of AmigaOS 3.0 (and eventually
- above) to the Amiga.
- The AGA chipset is now being shipped in both the A4000 and A1200, and
- will most likely be included in some form or another in future Amiga
- models. This chipset is capable of increased graphics bandwidth, and thus
- will run graphics-intensive tests at faster rates than a similarly
- processor-equipped ECS or older chipset based Amiga. Moreover, the
- AGA set has mandated architectural changes to CHIP RAM, and how the
- custom chips act upon it. Because of this, it is important to take these
- factors into consideration when noting benchmark results between AGA and
- non-AGA equipped systems.
- In order to take advantage of the AGA chipset, AmigaOS 3.0 is being
- utilized on systems utilizing such. This version of AmigaOS is not
- restricted to use on AGA systems only, however. For this reason, it is
- very important that on tests which utilize OS functions (most prevalently
- the graphics tests within AIBB) that said OS version be taken into account.
- AmigaOS 3.0 is faster and more finely optimized in many ways than previous
- OS releases. Graphics routines within often run much faster than similar
- counterparts on pre-3.0 releases, and will thus reflect a higher rating
- in test measurments. This MUST be considered when making any comparison
- between pre-3.0 based machines and ones utilizing AmigaOS 3.0 and above.
- The above proves to illustrate that MANY factors must be considered to
- make proper comparisons between any two systems, let alone many. If a test
- result seems different than what would be expected, check ALL the parameters
- which may differ. AIBB itself contains both systems running 3.0 and
- 2.04 OS versions in its default comparison machines, and this should not be
- overlooked when making a good comparison with a given host system. At
- present, the only 3.0 equipped system in the default lineup is the A4000,
- but the influence of using AmigaOS 3.0 on system performance (mostly in
- the areas of tests which use graphics calls, and other system kernel calls
- -- stock tests which do not directly use the OS are not affected) should
- not be ignored.
- In addition to all this, AIBB also now allows graphics tests to be
- performed in a user-selectable screen mode on systems running AmigaOS 2.1
- or greater. This fact necessitates that comparisons be checked VERY
- carefully, as differing screen modes can influence performance results.
- AIBB will attempt to give warning if compared systems were using differing
- screen modes, but ultimately it is up to the person making the judgements
- to be cautions about this.
-