Apple II SCSI Card

[mcdermd]

I'm leaning towards having a bad card because I think I'm doing everything correctly.

I have an Apple II SCSI Card (not the Hi Speed Card, just the regular one) #607-0291-A with a Rev C ROM on it.

The Apple IIe has a Disk II controller in slot 6 and a Super Serial Card II in slot 3. I put the SCSI card into my Apple IIe in slot 5. I plug in a 20SC drive into the DB25 connection. The 20SC has a passive terminator on it and is setup as SCSI ID 0. When I go to boot, it starts to start ProDOS from the Drive 1 Floppy (Apple SCSI Card Utilities) and then hangs. The floppy stops accessing on the initial ProDOS screen. It's like it's waiting on the SCSI. If I remove the SC20, it still hangs. If I remove the SCSI card, all is fine.

Having the same sorts of issues on an Apple IIgs with the same card.

Any ideas? Just a bad card?

 

[david__schmidt]

The 20SC has a passive terminator on it and is setup as SCSI ID 0.

What other variations have you tried? You definitely don't want a drive as SCSI ID 0; that's usually for the controller. Try 3, 4, 6 - anything but 0 or 7. Also: have you tried putting a terminator on the chain anyway?

 

[mcdermd]

Same thing on ID 3, 4, 6 and an active terminator on the SC20 enclosure. Also the same with no terminator on the enclosure at all. Also the same with no drive connected to the SCSI card.

 

[coius]

the Apple II SCSI Cards have to have Term Power provided, otherwise you can't terminate it. If your drive you put on it doesn't provide terminator power, the card won't see anything at all. When I had mine, I had that issue. Most drives don't provide Term power, or they are low-end and they left that feature out.

Zip drives don't provide Term power, and there are some CD-ROMs that do, but you would have to check.

Check your drive specs and see if it provide Terminator power. If it doesn't, you may have to either get a different drive, or somehow provide power for the terminator

Just out of curiosity, where did the get that card? A few months ago i sold one on eBay that I upgraded the ROM to Rev C and included it in the auction. When did you get the card and was it on ebay a few months ago?

EDIT: nvm, The one I had was sent to germany, not in the states

 

[mcdermd]

I got the card with a IIgs a long time ago.

The hard drive is a stock Apple SC20. I have an active terminator (the block with an LED?) on the second centronics connection in back. Is that not enough to terminate the chain?

 

[coius]

I think there's a switch on the card that also sets the terminator at the card. If not (i seem to recall there is) or you cannot figure it out, you may have to provide a pass-thru terminator as the first thing after the card before the devices you add. It's not enough to just put one terminator.

Unfortunately, I do not have access to the manual. You might need to look online. check out google and look for any instructions you can get.

 

[mcdermd]

I've got the Apple doc. There is no switch on this card. There is a jumper block that sets the computer's priority? The manual has a short blurb about it.

So I hooked the DB-25 from the card to a DB25-->Centronics cable, that cable into an active terminator (Apple part #590-0772) and the terminator into the SC20.

Same thing. Boots to the ProDOS screen, floppy goes inactive and it's hung.

 

[mcdermd]

It looks like the High Speed SCSI card had a set of DIPs on it. The earlier card does not.

 

[waynestewart]

One thing I liked about the rev C SCSI card was that if there was no drive attached or the drive was shut down the the card was ignored. Now I'm not sure if that happens when you're trying to run the SCSI utilities but it should with all other programs. So if your system hangs with regular programs with just the SCSI card in your computer then you have some SCSI card problem. On my cards the jumper is on the right pins, that's the ones marked 8 & 9. There should be three chips that are socketed. Two PALs and an EPROM. I'd check that they are facing in the correct direction and that none of the pins are bent over.(seen both several times) Other than that, I'd look for damaged components and at the one cap in the lower right corner. Oh yeah, the PAL closest to the EPROM has a lower part number

It'd be nice if you knew someone with the same card that'd let you try out the PALs & EPROM. Aside from the 5380, the rest of the components are regular off the shelf parts

 

[Unknown_K]

Yes, that is one the best features of the rev C card, turn the drive off and the system doesn't know the card is even there so you can boot floppy games.

When I have external SCSI enclosures (like I do on the IIgs), I just terminate using the second plug on the back of the drive case and not on the drive itself.

Those 25 pin external terminators are easy to find.