| Title: | AMIGA NOTES |
| Notice: | Join us in the *NEW* conference - HYDRA::AMIGA_V2 |
| Moderator: | HYDRA::MOORE |
| Created: | Sat Apr 26 1986 |
| Last Modified: | Wed Feb 05 1992 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 5378 |
| Total number of notes: | 38326 |
Well, I got last week an 68000 'Turbo' 7/14mhz chip.
- The first I recived from Bytes&Pieces was dead, so it took them a while
to get me an other one. (I ordered this chip end February�).
- It's easy to fit in the computer, if you've got the adequate tools.
AND beware the thin legs !!! :-) had some trouble there too ...
- This chip ticks faster but it doesn't increase the speed that much.And
at 14mhz it doesn't reconize the extra memory (I've got a 8-UP 2mega).
Anyhow, it's working ! Now I got the test from CPU_BENCHMARK.LZH on
Tape and run them on my computer in the two speed modes. With the small
program MIPS,I had .82 Mips at 7mhz and .92-.99 at ~13mhz.
With the CPU_MEMY at normal speed i've got an 1 factor, and 1.05 factor
at 14mhz. Each different benchmark program gives me another speed for
my processor � Now with the AIBBv3.lzh the speed the program gives me
is 4.82mhz when the processor is supposed to work at 14mhz is there a
display fault ? and the factor is ~84%. Even slower than at 7mhz which
already makes only ~86% compared with a normal A2000 � what is
happening ?
Any clues �
Anybody else having this strange mutant processor ?
Erik
System : B2000 (1meg)
1084
Trumpcard with 46meg Seagate
8-UP (2meg)
NEC pinwriter 2200
& external drive
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 4845.1 | did I miss something | SALEM::LEIMBERGER | Mon Jun 24 1991 11:11 | 4 | |
I must have missed something here. I did not see you mention changing
the Oscillator for the CPU. If you install a faster CPU don't you need
to increase the clock rate to take advantage mof the faster cpu ?
bill
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| 4845.2 | No, I did | TRUCKS::BUSSINK_E | Honey, I iconified the kids ! | Mon Jun 24 1991 11:34 | 6 |
This CPU processor comes on a small board, and has an additional chip.
There is a small switch that you get out of the machine in the front
(Near the mouse, doesn't look great but does the job) and a small
'probe' that connects on the oscillator without soldering.
Erik
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| 4845.3 | 13Mhz - Sound Familiar !. | VIVIAN::D_VISTUER | Mon Jun 24 1991 18:08 | 46 | |
Erik,
I would like to butt in here. I read the Amiga Shopper write-up on
this beast. Their example did not work either. However, this is not the
reason I am writing this reply.
I also have a need for speed, so I tried to build the New14Accel.lzh
project. It did not work. So, I built the CheapAccel.lzh (?) project
and it did !!.
I then ran as many benchtest against it while it was working (which
was, to my surprise about 90% of the time). The benchtests ranged from
SI2 version 0b to Aibbv3. As a comparison I also ran these same tests
(I this 12 in all) on the standard 68000 @ 7Mhz and a 68010 @ 7Mhz.
It was a close run thing between the 68010/7 and the 68000/14 but
the Overall winner with a % improvement over a 68000/7 was the
68000/14 with 29%. The 68010/7 scored 11%.
However, the 68010 was the clear winner when I ran CpuSped which does
lots of different types of memory/register manipulations. In some cases
scoring 80% faster than a 68000/7 when moving a registers contents to
fastmem. The best score for the 68000/14 in this suite of tests was a
score of 66% when doing an unsigned divide in data register.
I intend to write up the results in a file for others to read in the
near future.
BTW: I have looked into the AdSpeed a it seems to be quite a wicked
beast for the cash, especially as it offers 100% compatablity and a
speed increase that is noticeable !.
Before I go, you mentioned that one of the benchtests you ran gave you
clock speed as 13.xx Mhz - strange, cos the CheapAccel.lzh hack gave me
a speed rating of 13.32 Mhz in some tests and Aibb3 gave 7.67 Mhz. The
mind boggles !!!. Me thinks its cos the 8520s being clocked at twice the
speed now causes the thing to screw around hence giving erroneous
results. In closing, would it be possible for you to tell me the chips
used in your TURBO board cos I think its exactly the same as the
CheapAccel.lzh project.
Anyway, better go now, running out of electronic ink !.
Regards.
Dave Vistuer.
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