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by Smonson
Sun Jul 19, 2020 8:40 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

Thanks @czietz. I guess that means there's something wrong with the data on the disk itself.
by Smonson
Sun Jul 19, 2020 3:18 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

So, I think I got this all pretty close to working... I still need to speed up the SD card transfers because there's a 3-second timeout on ACSI transfers, after which the operation gets aborted. And of course the AHDI drivers insist on doing 128-sector bursts which is too many for most of my SD card...
by Smonson
Sat Jul 18, 2020 7:23 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

Phew! After implementing that geometry page thing, plus read, write, and format, I can format the device in the AHCI drivers now (with 100% bad sectors). ICD Pro doesn't work at all. I think it's set up to only work with SCSI drives. I set it up with 1 head, 10 sectors per track, and 8 tracks but th...
by Smonson
Sat Jul 18, 2020 12:39 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

See page 460 of this document (Rigid drive geometry parameters page, 0x04h ): https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjay6ea7dTqAhWSUMAKHeBfCK4QFjABegQIBxAB&url=https%3A%2F%2Fwww.seagate.com%2Ffiles%2Fstaticfiles%2Fsupport%2Fdocs%2Fmanual%2FInterface%2520manuals%...
by Smonson
Fri Jul 17, 2020 2:00 pm
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

Nope, wrong again. I'm just going to stop talking now.
by Smonson
Fri Jul 17, 2020 1:51 pm
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

No no, I'm totally out of the ballpark. There is a READ BLOCK LIMITS command in scsi-0, but it's not mentioned at all in the Integration Guide, and it's so old that it doesn't appear in the copy of the SCSI spec that I have. But I finally found a reference to it on page 121 of an old scanned copy of...
by Smonson
Fri Jul 17, 2020 1:03 pm
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

Maybe you can start first with Atari's AHDI? ICD made ACSI-SCSI adapters known for their extended SCSI commands set support (group 1) using 2-bytes commands (IIRC $1F+group1 command byte) where ACSI is limited to 5bits commands (group0) I think you're right there, I have also seen another forum pos...
by Smonson
Fri Jul 17, 2020 10:12 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

OK, I've got a question or two that someone more knowledgeable might know the answer to. I've been using the ICD Pro driver disk as a test utility (I'm a cheapskate), but I'm a bit confused about it. 1) Do ICD Pro compatible drives use a different protocol from ACSI? - I see references to LUNs and t...
by Smonson
Fri Jul 17, 2020 7:38 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

Have a look at the OSSC schematics for a similar, but different approach to this. It's got the same central large hole you've done, and then a grid of much smaller holes around. If you put flux down on the component side before you put the chip down, it'll do a really good job of sucking solder up ...
by Smonson
Fri Jul 17, 2020 7:34 am
Forum: HARDWARE DISCUSSIONS
Topic: Smonson's untitled simple harddisk project
Replies: 33
Views: 1145

Re: Smonson's untitled simple harddisk project

beel1 wrote:
Thu Jul 16, 2020 7:18 pm
Again a nice project from mister Smonson :D
I guess the ATARI ACSI/DMA Integration Guide is your new bedisde book :D
Thanks @beel1 , yeah I have been mainly working from that document. Fortunately it's well written and easy to follow, until the SCSI spec which is absolutely awful.

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