68030 not running at 25Mhz

[Lurch]

Ok so the crystal is 25Mhz and the CPU is 25Mhz but sysinfo is reporting 13.4Mhz?

My card -

http://amiga.resource.cx/exp/professional530plus

[Lurch]

I guess it divide the clock with 2. So the crystal may have been swapped. What is the speed on the cpu?
(Text on the top of the cpu)

If you have a 16mhz 030, you need a 30mhz crystal. If a 33mhz 030 use a 66mhz and so on.

CPU is 25Mhz and crystal is 25Mhz. So I have a 68030 40Mhz and a 40Mhz crystal coming if it divides it by two that's a bummer :-)

Have also tried with a 20Mhz 68030 and that to is stuck at 13.4Mhz :-/

[Lurch]

So will need to source a 80Mhz crystal ? :-(

[Lurch]

should have tried the 25Mhz CPU with the 40Mhz crystal before replacing the cpu.

Havent received the 40Mhz stuff yet, still on it's way.

[Lurch]

Sysinfo mostly does educated guesses about the frequency - you need something more reliable.

Looks like sys speed might be the thing to try going by forum posts. Would the result from the speed test in Sysinfo mean anything?

i.e. what would one expect from a 68030 25Mhz?

[Lurch]

Get 2600 tops with the 4MB onboard. So looks like it's stuck at 13.4Mhz. The screenshot of sysinfo posted is what I was expecting LOL

So some thing isn't working as intended.

Got the 25Mhz with the card :-)

Ah well when I get the new 40Mhz crystal I'll try ticking that in it and see what happens :-)

[Lurch]

AIBB/sysspeed all state 13 or 14.5Mhz so something weird going on here.

25Mhz Crystal
25Mhz 68030
25Mhz FPU

Maybe something software wise :-/ 68030.library?

[Lurch]

LOL yep, even tried another crystal. Who knows haha :-)

[Lurch]

Just have the two crystals, both 25Mhz though. Waiting for a 40Mhz that I bought, will give that one a go.

[Lurch]

AIBB also confirms half the speed, although it shows the FPU at 25Mhz

There is 4MB RAM on the card.

System: 68030 68882 (INST: Cache Burst) (DATA: Cache NoBurst)

Will assume that it's halving the speed :-/ So when I finally get my 40Mhz crystal I'm assuming it'll be 20Mhz. If this is the case I'll need a 80Mhz Crystal to get the full 40Mhz CPU.

Strange card. Wont really know until I get the faster Crystal I guess.

I'd say the cache is on going by the cpu command result, also using setcpu states the same thing. There's only the one crystal on the card so don't see a separate one for the fpu.

[Lurch]

The other fear I have reading the manual is it's stuck at 14Mhz no matter what LOL

I don't see how I can clock the FPU seperate from the CPU, but would be handy to do.

Hopefully have the crystal in the mail today/tomorrow (wishful thinking) and I can give it a go with that.

Would suck that I can only get 20Mhz out of it. Maybe I need to spend some cash on a ACA500 after all :-(

[Lurch]

nor could I? plus I couldn't read German :p

My Mega Midget Racer has spots for two crystals, you can then use jumpers to either clock the FPU at the same speed as the CPU, using a single crystal, or clock it at its own speed, using a separate crystal...

My VXL-32 has this option, downside to that card is I don't have the RAM module. So pointless using it as it's not much faster if at all than my 68010.

Unless someone wants to swap/trade? :-)

[Lurch]

My original aim was to play space quest/kings quest enhanced at a decent speed. Runs okay at 7Mhz but slow and laggy.

Then had the idea of trying Doom, which should be sorta playable at 40Mhz. So unsure about anything slower.

If I can get 33Mhz that would be good, although you mention that 40Mhz would be pushing it for the FPU to cope?

As it appears I cant seperate the two if I put a 66Mhz crystal in would the FPU fry itself? I could always remove it :-)

[Lurch]

Must have more power :-)

[Lurch]

It has a 68882, if that's the case I'll see if I can track down a 60Mhz crystal. An extra 10Mhz would be great.

Seems weird that it should halve the speed for the CPU and not that the FPU. Have checked the board a couple of times and I can't see where you can set the FPU to be seperate from the CPU :-/

Craziness TBH.