On 11/28/19 9:34 PM, David Kuder via cctalk wrote:
> After digging in the manual for the controller card, it appears they have set
> it up to only support single density FM formatting. Even still, formatting
> the disk 568KB FM with either clock speed 8MHz or 4MHz (and 500KHz / 250KHz
> WCLK re
After digging in the manual for the controller card, it appears they have set
it up to only support single density FM formatting. Even still, formatting the
disk 568KB FM with either clock speed 8MHz or 4MHz (and 500KHz / 250KHz WCLK
respectively), same outcome with missing address mark. I thi
On 11/28/19 7:06 AM, David Kuder via cctalk wrote:
> I've tried using the 8" drives as 8" drives with the clock input to the
> 8272 set correctly, and likewise with the 720KB 3.5" emulator (and even
> 360KB 5.25" emulation). On physical and virtual disks I'm getting the same
> error trying to read
I've tried using the 8" drives as 8" drives with the clock input to the
8272 set correctly, and likewise with the 720KB 3.5" emulator (and even
360KB 5.25" emulation). On physical and virtual disks I'm getting the same
error trying to read or write data. Formatting steps through all the tracks
wit
I'll agree with Chuck, that FM/MFM seems a likely possibility.
index blindness can prevent seeing the first sector, but it should see
other sectors.
What is on the disk that you are trying to read?
You are using an 8" drive, but you mention settings for 720K.
720K (MFM) is normally 250K bts
On 11/27/19 8:46 PM, David Kuder via cctalk wrote:
> Hi friends,
>
> In the continuing saga of building a CP/M system with Pro-Log cards housed
> in a Heathkit dual 8” floppy drive cabinet…
If you're talking about ST2, bit 0 being set as an error, this can occur
for several reasons.
A. You're tr
Hi friends,
In the continuing saga of building a CP/M system with Pro-Log cards housed
in a Heathkit dual 8 floppy drive cabinet
I recently acquired a Pro-Log 7387 floppy disk controller card w/ manuals.
The 8272 chip on the card was fried (either before I got it, or by me doing
something stupi
