On 11/30/09, Jim Brain <firstname.lastname@example.org> wrote: > Ethan Dicks wrote: >> Nice. >> > I mainly wanted one so I can see how CBM planned HDD storage (I have > noticed an addition ',1' on the end of error strings, but maybe that's > just BASIC 4.0's ?ds$ doing that.) If there is anything of interest in > the drive ROM/functionality that can be added to uIEC, I'd like to find out. What about the "OPEN #15... INPUT#15..." route? That will give you *exactly* what the drive has to say and you wouldn't have to worry about anything BASIC 4.0 might be doing. I spent most of my time on BASIC 2.0 machines, so I while I know the new commands, I still "think" in the old paradigm. Naturally, you can't just INPUT or GET interactively, but I always used to stuff a little drive scoping subroutine on stuff I was working on so I could jump to it from the READY prompt. >> Given that you don't know about the state of the Tandon drive, I'd >> grab an ST225 or ST251... >> > Anyone have one I can borrow :-) I don't have (never did) much in the > way of vintage HDDs Hmm... maybe someone closer to you can help with that. >> Be sure to check the state of the J13/J14 jumper - it goes in D9060 >> mode for a 4-head drive and D9090 mode for a 6-head drive... > > I'll check that, but I would think the drive would give 00,OK,00,00 for > commands like reading the drive channel. I always get a 74. I meant that you should check that if you swap hard drives. It's possible it's wrong in yours (it was wrong in one of mine), but I think you get a "74" if you have any sort of bad low-level format or HDA error. > If I had to guess, I'd wager the SASI board is bad, as it was getting > 12V but not 5V for a number of power cycles. I have not looked at the > schematic in depth, but I would assume they did not bring 12V to the > board for nothing, and operating with only half a supply might not be > good for it. Given your issues, that's probably not a bad guess. Obviously if you've never formatted the disk, you wouldn't want to as a first-pass item (in case there's something neat out there), which is why I suggested a new drive to do format and write test. My recollection is that the drive is pretty much unhappy with most requests if the disk surface isn't usable. Of course, if your SASI board is toast, the format should fail, hopefully right away. Unfortunately, I think it's easy to fix the DOS board, but I'd be scratching my head on where to start repairing the SASI board, especially with power-related/induced problems. -ethan Message was sent through the cbm-hackers mailing listReceived on 2009-11-30 19:00:26
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