Jeff wrote:all the disks seems to be perfectly formatted (see it into the track viewer), so i suppose that this is a SDCard write latency problem. Which SD are you using ? When did you got the error exactly ?
I've tried this with a quasi-generic ("Silicon Power") class 4 8 gig card and a Transcend class 10 16 gig card, with identical results.
The error sequence works like this:
* Start up TI's "Disk Manager" (original or modified for additional drives, doesn't matter)
* Select "Disk Commands"
* Select "Initialize Disk"
* Set options appropriate to the image (40 or 80 tracks, single or double sided, always single density)
* Confirm format and it starts
* HxC seeks to the bottom track, reads, writes, reads
* Disk Manager reports "error 43" and fails. The image is now unusable.
However, this appears to be the case only with TI's "Disk Manager". Other formatting utilities (specifically "Disk Manager 2000", which despite the name doesn't seem to share code with TI version) do not fail.
So ... it doesn't appear to be related to the SD card (manufacturer or speed), but something specific to that particular formatting utility. Odd.
Edit: no, I was wrong. Formatting fails across-the-board. Initializing (simply resetting the initial directory track) works fine. I don't know enough about Shugart drives to understand what's different between low-level formatting and a simple byte-write, but clearly the HxC isn't responding the way the TI's 1771 controller expects it to.