Vector 4 - Page 126

VECTOR 4
TECHNICAL INFORMATION
SECTION VII - OVERVIEW OF THE DISK CONTROLLER
SYSTEM
Summary: The SBC interfaces with the disk drives through the use of
a separate PCB. This PCB is located in the one of the Expansion
Slots.
The 40/30 system uses a FD/HD Disk Controller Board. The mterconnectmg cables
which connect this controller board to the disk drives are shown in Exhibit II-31.
The Disk Controller Board has several features.. These include the following:
l. On-board hardware generated Error Correction Code.
2. Through Extended CP/M the Disk Controller can access either double-sided
(double density) or single-sided (double density) floppy disks. NOTE: The
floppy disks must be hard sectored.
3. On-board memory that provides quick loading and unloading of data.
* Schematics for both types of Vector 4 compatible Disk Controller Boards (FD
and FD/HD) are given in Rart VI, The VECTOR DISK CONTROLLER BOARD
MANUAL is presently being written. It will give the Theory of Operation along
with various rnodlflcatlon procedures for the different types of Disk Controller
Boards.
09-01-82 | 7200-0001 II7-1