C70:info-cpm (06/21/82)
>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