Hard Sector Disks

At 10:23 AM 1/21/99 -0800, Marvin <marvin(a)rain.org> wrote: soft sectored The H37 system was soft sectored only and the box was styled to sort of match the H89/Z90 machines. Color was the same --that greyish color, drives mounted vertically side-by-side, the front panel sloped back about 10 - 15 degrees. The H8-37 disk controller replaced the H8-17 controller used with your system. There also were both hard and soft sectored controller boards for the 89/90 machines. As for your other two cases, the one with the 5 1/4" drives would be a '37 if it was as described above. Now, for the 8" unit, if you've got an H47 (which I've _never_ seen, just have a manual and controller board) then you'd have an H8-47 controller board plugged into the H8 bus The H47 controller has a simple SASI interface and two serial ports. The '17 and '47 could work together I believe (Barry W.?) If you have an H27, then the box would look similar to the H8 and H11 but be bigger and a couple hundred pounds heavier (well, it dang sure as heck seems like it). And, it would not work with the H8, only an H11. I have all of the above in my collection except for the H47. I built the H8 system myself in '82/'83; recently obtained two of the H11 systems and found a partial H89 10 - 12 years ago. As for the soft sector conversion you mentioned, I don't really recall such a thing but these machines could certainly be hacked. I wonder if the software was hacked for the H17 system to ignore looking for the 10 sector holes yet only notice the index hole thus utilizing a s/s floppy? (again, Barry?) -- Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA cfandt(a)netsync.net Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/