Re: AT&T 3B2 floppy format

2016-04-03 Thread Chuck Guzis
Yesterday I was about to suggest that the 300Kbps/300rpm mixup might be the problem, but I figured that it would surface eventually. IMD does have an RPM-checking routine--I use it frequently when modifying 2.0MB 3.5" drives to masquerade as 1.6MB ones. It ensures me that the result will beha

Re: AT&T 3B2 floppy format

2016-04-02 Thread Curious Marc
* On Fri, Apr 01, 2016 at 11:41:01PM -0700, Curious Marc wrote: It looks like you did everything right. However I thought one specifies interleave directly in the BIN2IMD command using the DM=3 option. I see you have DM=4 on your command line. But since you can load the kernel that might no

Re: AT&T 3B2 floppy format

2016-04-02 Thread Fred Cisin
On Sat, 2 Apr 2016, Seth Morabito wrote: After doing more experimentation this morning, I've discovered that the data mode I should have been using was 250kbps MFM, NOT 300kbps! After changing ImageDisk to write 250kbps (and ensuring that the 300RPM "I" jumper was strapped on the FD55-GV), the im

Re: AT&T 3B2 floppy format

2016-04-02 Thread Seth Morabito
* On Fri, Apr 01, 2016 at 11:41:01PM -0700, Curious Marc wrote: > It looks like you did everything right. However I thought one > specifies interleave directly in the BIN2IMD command using the DM=3 > option. I see you have DM=4 on your command line. But since you can > load the kernel that might

Re: AT&T 3B2 floppy format

2016-04-01 Thread Curious Marc
It looks like you did everything right. However I thought one specifies interleave directly in the BIN2IMD command using the DM=3 option. I see you have DM=4 on your command line. But since you can load the kernel that might not be the source of your problem. Having a disk being formatted in one