From: utzoo!decvax!harpo!npois!ucbvax!C70:info-cpm Newsgroups: fa.info-cpm Title: Small Hard Disks Article-I.D.: ucb.1401 Posted: Mon Jun 21 00:04:55 1982 Received: Thu Jun 24 01:18:56 1982 >From ucivax!csuf!bruce@Ucb-C70 Mon Jun 21 00:04:10 1982 If you are looking for a small capacity, but very high speed Winchester hard disk, you might look into the New World MikroDisc. Its specifications: 3.6 Mb formatted 2 surfaces 16 heads (8 per surface) 20 head positions (cylinders) optional 3.6 Mb removable cartridge 8.3 mS latency 15 mS settle time 5 mS minimum seek time 90 mS maximum seek time 30 mS average seek time The disk is designed to be used as a cache in a virtual memory system (kinda like a drum). An S-100 controller exists, and a "universal" controller is in the checkout stage. The universal controller may be adapted to almost any machine by developing a simple bus adapter. An S-100 adapter for the universal controller also exists, so you can have your choice. The universal controller attaches directly to the disk drive, and is much better in my opinion. (Or will be after the checkout stage). I'm currently using the S-100 controller on a MikroDisc formatted with 32 sectors per track (which gives 2.6 Mb) running CP/M, and I'm quite pleased with it. Oh yeah, add these to the specs: 256, 512 or 1024 bytes a sector with the S-100 and univ. controllers up to 40 sectors per track at 256 bytes per sector 40 sectors of 256 bytes * 16 heads * 20 cylinders gives 3.6 Mb If you are interested, contact: New World Computer Company 2805 McGaw Irvine, CA 92714 Bruce