Apollo 060 fault (A1200)

[Tricky]

I've had this problem ever since I bought this card 2nd hand, I'm sure I remember it being sold as a Blizzard 060 (I have a Blizzard box) but it seems to actually be an Apollo card (it says "Apollo" on the little power converter board that comes off).

Anyway.  The problem is, there is a jumper to select between 2 different clock modes, one is for if it has a 040 chip on it, which basically halves the clock frequency (the 040 comes with 80MHz clock which makes 40MHz for the processor), the other setting is for if the board has an 060 which doesn't halve the clock frequency.  However, although it has a 68060 on it, it doesn't work in 060 mode (doesn't boot or anything, just get a blank screen), although it works in 040 mode so instead of running at 50MHz I'm only getting 25MHz.

It hasn't bothered me so much because it was much faster than the previous board anyway, and I don't have much problems with it being too slow.  I just wondered if anyone here had experience of this sort of thing, because it would still be nice to get it to run at the proper speed.

I guess I could replace the clock for an 80MHz one and at least run at 40MHz.

[Tricky]

It's definitely an 060.  It says on it "XC68060RC50".  I'm not that daft!  And no fans or anything.

There are in fact two sets of jumpers.  One has "RAM" (on) "SCSI" (off) and "060" (on).  The other selects between 040 and 060 clock modes and has to be 040 for it to work.  The other jumper for 060 has to be on for it to work!

[Tricky]

Who is this swedish person?

Oh and another information: the TTL clock says 50.000MHz on it, and yet SysInfo reports 25MHz.  So it is definitely true that the 040 mode halves the clock frequency for the processor.

[Tricky]

The function of the 040 jumper setting, according to the manual, is that it halves the clock signal sent to the processor.  The 040/40 board is apparently the same as the 060/50 board except with a different processor and jumper settings.  The 040 board has an 80MHz clock that is halved to 40MHz by the jumper setting.  Hence a board with a 50MHz clock will run at 25MHz with this setting.

The overall performance of the processor is also half what I would expect it to be for an 060/50.

I've downloaded that program, it seems to crash my computer for any test I try to run.  Although now SysInfo crashes too, I don't remember it doing that but I could be wrong.

The CPU command reports "68060 (INST CACHE BURST) (DATA CACHE BURST)"

[Tricky]

The clock on the board clearly says 50MHz, and yet still it does not work with the jumper in the 060 position.

68060.library version 44.3.

[Tricky]

Hello there PG!  Thanks for replying.  But now I'm really confused...

The manual says it should be on the 060 setting but you say it should be on 040?  So do I have a 50MHz processor or a 25MHz processor?  It seems cheeky that they claim it's a 060/50 if it's the latter.

Also is it not true that the 040/40 uses a 80MHz clock, hence a 40MHz processor speed?  If so a 80MHz clock is surely not overclocking the board.

How about a 66MHz clock, if I can get my hands on one?  And is MC68060 better than XC68060?

Also any ideas why benchmark programs seem to crash now?

[Tricky]

Ah, I understand now... I thought the 040 was getting half the board speed, but rather, the board gets half the clock speed and the processor gets the full speed.  Very odd behaviour of the 040 in that case...

As for resoldering a resistor, well that's a scary prospect in any case, but all these seem to be surface mount!  Unless it's on the other side of the board.  I'm not taking it out again just now.

Does the 1260/66 use a cooler?  I'd prefer a slightly slower computer than a much noisier one.  If there's one thing I can't stand it's a noisy computer.  So I'll probably just leave it as it is in that case.

I probably don't have the right library, I don't remember getting any disks with the card.  Where can I get the correct one?