Re: Error #4 on TransWarp

[dog_cow@macgui.com (D Finnigan)]

Geoff Body wrote:
> I have had a look at the code in the V 1.3 rom.

Indeed, that's the revision of my TransWarp. I wonder what the differences
are between it and the newer 1.4 revision.

> The error #4 is displayed when slot slow down doesn't work correctly.

Thanks. That's the explanation for which I've been searching these past few
days.

> It sets the speed to 1MHz and measures the number of loops between two
> VBL
> Then it sets the speed to Fast and accesses slot 6 port C0E0 (I guess
> it is expecting CPU to slow down) and repeats the follow 30 times,
> measures loops during VBL again and compares it to the orginal value
> measured.
> 
> If you check your speed setting on slot 6 you may find it set to fast?
> 

I listed the slot setup in my earlier followup.

Now here are more details from my experience:

So far, I am not using the Disk ][ controller, but instead I am using an
Apple 5.25" controller in Slot 5. I had set the TransWarp speed to normal on
slot 5, and it worked.

A day or two later, I wanted to use Apple Pascal, so I moved the controller
to slot 6, but I forgot to set the TransWarp speed. Naturally, the disk
drive did not work. I remembered to set the DIP switch for 6, and that got
it working.

In conclusion: I know that the slow-down settings for slots 5 and 6 are
working. They must be, otherwise the disk drive wouldn't have worked in
those two instances. What I have not tested are the remaining slots. I shall
do that later today.

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