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| Vector Graphic Micropolis FD Control B The Micropolis Disk Controller Board is implemented on a
5-by-10 inch PCBA that plugs into the S-100 bus. The controller contains the following major functional units:
a) Control logic to interpret CPU selection and respond to CPU
commands.
b) A sector separator that separates sector and index pulses and keeps track of each sector as it passes under the read/write head.
c) Write logic that converts parallel-form bytes from the CPU to serial data suitable for recording on the disk.
d) Read logic that converts the serial data from the disk to
parallel-form bytes for transfer to the CPU.
e) Bootstrap PROMs for reading sector zero of the system disk into RAM, then starting the program in RAM.
 Micropolis FD Control B | |
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