26 Jan
2012
26 Jan
'12
5:13 p.m.
On 26 Jan 2012 at 11:18, Dennis Yurichev wrote:
On 1/25/2012 11:45 PM, Chris M wrote:
The data is inverted, but the address marks are normal. By and
large 10-sector formats. I am aware of about 5 different Superbrain
formats: The exception is the 30x128 byte sector MFM format, which
can be written with a controller that uses the National DP8473
controller (common on ISA SCSI+Floppy controllers, particularly
Future Domain and DTC).
Here is what I have samples of: (sector size/sectors per
track/sides/cylinders):
1. 512*10*1*35 MFM
2. 512*10*1*40 MFM
3. 512*10*2*35 MFM1
4. 512*10*2*80 MFM
5. 128*30*1*40 MFM
The Wren Executive shares the second format with the Superbrain.
--Chuck
wouldn't you do well to ask Dave? He's
probably got images of the
s/w.
I did, and he wrote Superbrain's disk drives wrote data in some
"inverted" fashion and it is complicated to write them using usual PC
floppy drives, so that's why he didn't put images on website.