Industrial Micro Systems -
Winchester Disk Controller
This is a controller for Winchester Hard
disks -- not ST506 hard disks.
The controller can interface with up to
4 Winchester hard disk drives. However each drives requires a special "interface"
board shown here.
The interface card provides sector
signals to the controller for read/write/format operations by using a phase lock
loop reference synced with the drives index pulse.
Commands to each interface card from
the controller are placed via the 8255 on the board. The manual
explains in detail the process. The controller has a 1K RAM buffer on board with
a 4 byte CRC error detection system. Sectors are 512 bytes in
length. The board software is set to I/O ports A0H - A7H.
The limited manual I have (no schematic
or ROM software) can be obtained
Other IMS S-100 Boards
QIC Tape Controller
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