A4000/A3640 can't see the secondary devices

[Berry]

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.

Can someone help me on this brain cracker?

[mechy]

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.

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

[amiman99]

@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.

[mechy]

@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

[Berry]

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!

[SpeedGeek]

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.