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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Berry on October 06, 2012, 07:26:12 PM

Title: A4000/A3640 can't see the secondary devices
Post by: Berry on October 06, 2012, 07:26:12 PM
When i connect a ZIP and/or DVD drive to my A4000, using a A3640 card, the system doesn't boot. While disconnecting the ZIP/DVD drives my A4000 boots again.

Interestingly enough the ZIP and DVD drive are working in the same A4000 when i exchange the A3640 for the 030/25MHz card.

I have made a detailed overview on my blog (http://c64.berrydejager.com/a3640/).

Can someone help me on this brain cracker?
Title: Re: A4000/A3640 can't see the secondary devices
Post by: mechy on October 06, 2012, 07:48:19 PM
Quote from: Berry;710541
When i connect a ZIP and/or DVD drive to my A4000, using a A3640 card, the system doesn't boot. While disconnecting the ZIP/DVD drives my A4000 boots again.

Interestingly enough the ZIP and DVD drive are working in the same A4000 when i exchange the A3640 for the 030/25MHz card.

I have made a detailed overview on my blog (http://c64.berrydejager.com/a3640/).

Can someone help me on this brain cracker?


Ok, if i am reading your blog correctly, then you have hacked the 4000 ide gal for faster speed and you are using the 4 way adapter.

Looking at the picture of your A3640 ,it is actually a rev 3.2 (notice the -03 on U209 gal) which is a good thing.

From what you say it seems its either a 4 way adapter problem,or the 4000 ide Gal hack is causing this incompatibility. Is it socketed? can you go back to the pio0 gal for a test? since removing the drive cables makes the machine boot i would think it might eliminate the 4 way adapter and blame the ide Gal chip on the motherboard but this may not be the case.

This is just a shot in the dark,but you might try cutting the pin 1 wire on the 40 pin ide cables(this is the red stripe) if you have some spare cables-I recall a 4000 with a problem living with 2 drives and cutting this wire sol ved the trouble,but my memory is not that good.

does this use idefix for the other channels?



Mech
Title: Re: A4000/A3640 can't see the secondary devices
Post by: amiman99 on October 06, 2012, 09:41:38 PM
@mechy
I used the "cut the pin one wire on ide cable" trick to get my SLOW IDE HD to boot, if not, then it would go to the "Insert workbench" screen.
Title: Re: A4000/A3640 can't see the secondary devices
Post by: mechy on October 06, 2012, 10:08:33 PM
Quote from: amiman99;710564
@mechy
I used the "cut the pin one wire on ide cable" trick to get my SLOW IDE HD to boot, if not, then it would go to the "Insert workbench" screen.

I couldn't recall for the life of me what cutting the wire did.. thanks for reminding me!

mech
Title: Re: A4000/A3640 can't see the secondary devices
Post by: Berry on December 26, 2012, 10:05:36 PM
I figured out that the PIO2 modification doesn't work for me in the above mentioned config. I have used two different sourced PIO2 mod GALs, both same results. While using the stock GALs all problems have vanished!

So back to basic again, and now it works!
Title: Re: A4000/A3640 can't see the secondary devices
Post by: SpeedGeek on December 26, 2012, 11:37:07 PM
I know about this PIO2 issue and I made a new IDEU901M.jed which helps and was tested by Cosmos with good results but I don't know if Yaqube approved of it's distribution yet.