My VIC resets when I turn on my disk-drive

[ral-clan]

Hi, most of the time when I turn on my 1540 disk drive my VIC-20 either does a soft reset, or it locks (the cursor stops flashing). Has anyone ever seen this behaviour? I'm wondering if it's somehow because they are both plugged into the same power bar/surge protector?

Strange.

At the moment I just have to try and avoid turning my VIC1540 on when my VIC is on.

[6502dude]

Sounds like reset line from 1540 is being held low.

If you power up 1540 first and then Vic-20, does Vic-20 come up ok?

[vic user]

i don't know which components you are supposed to turn on first, but i have found that if i turn on the vic last, everything goes smoothly.

if i turn on the printer or the drive last, things go screwy.

[carlsson]

As a side note, I observed that my original revision VIC-20:s send a reset (?) signal on the IEC bus when you turn it off, as well as when you turn it on. I tried a CR revision, and it did not send a signal on power off, just like the C64 doesn't.

[Schema]

If you press the reset button on one of my blue utility cartridges, the drives reset too. This happens even if the VIC is off!

[carlsson]

Yeah, the same happens with my userport reset button.

[ral-clan]

Sounds like reset line from 1540 is being held low.

If you power up 1540 first and then Vic-20, does Vic-20 come up ok?

Yes, it does come up okay. The reason, though, that I don't always have my 1540 on is that the original 1540s run very hot. Lately, I've put a fan on it, so it runs nice and cool, but now I leave it off to avoid the fan noise (until I need to use the drive).

I should mention that about 1 in 10 times the VIC *won't* be affected by the 1540 coming on.