home *** CD-ROM | disk | FTP | other *** search
- This is the document file for version 03 Jun 1990 of RAMSpeed.
-
-
-
- RAMSpeed tests memory speed (RunTime and MHz outputs) for each memory
-
- region in your Amiga system (provided there is room to run the test
-
- program). RAMSpeed also provides CPU and FPU (if present) MHz ratings
-
- within an accuracy of +/-3%. Your Amiga system Cache Status is also
-
- displayed if you have a 68020 or 68030 Amiga. RAMSpeed doesn't support
-
- the 68040 yet, but it will when more information is available on that
-
- device.
-
-
-
- The memory speed test is based on a loop of 4098 NOP's (8196 bytes) per
-
- loop. A total of 5000 loops are conducted resulting in a total of
-
- 20.49 million NOP's instructions executed. The MHz rating is based
-
- upon and NOP taking 3 Clock Cycles (CC's) on the 68020 and 68030 and
-
- 4 CC's on the 68000. So, if X = # CC's / NOP then the MHz rating is
-
- calculated as:
-
- MHz = X * 20.49 / RunTime,
-
- where RunTime is the test program execution time in seconds. Note that
-
- for the 020/030 the number of CC's is based upon zero wait-state 32-bit
-
- memory as the reference. This means that the RAM MHz rating will not equal
-
- the CPU MHz rating if your memory has wait-states or other delays. Also
-
- when the 020/030 emulate the 68000 in 16-bit 7.16 MHz memory a large hit
-
- in 020/030 performance occurs and the MHz rating will be very low
-
- (about 3 MHz or so) in these cases (Chip RAM, and 16-bit Expansion RAM).
-
- In general for all CPU's, the RAM MHz rating will not equal the CPU MHz
-
- rating if there are memory wait-states (just plain slow memory) or any
-
- other kinds of delays in the memory system (020/030 emulating the 68000
-
- at 7.16 MHz).
-
-
-
- RAMSpeed can be run from the the CLI/AmigaShell or Workbench. An Icon
-
- is provided. The assembly source code is also provided. To assemble
-
- and link the program you'll need TWStartup.o and amiga.lib.
-
-
-
- There are no restrictions of any kind imposed upon the use of this program
-
- or source code, although I would like to know of any 'bugs' inhabiting
-
- the program as I want it to be error free and I view myself as the
-
- 'Keeper' of the code (since I generated it).
-
-
-
- Al Aburto ('ala' on BIX)
-
- 03 Jun 1990
-