RK8-E disk controller

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The RK8-E disk controller was the PDP-8 OMNIBUS disk device controller for the RK05 disk drive. A single RK8-E could handle up to four RK05 drives. It used the single cycle data break form of DMA to transfer data directly to main memory. It uses blocks of 256 words; data transfers can range from 128 words up. It uses a CRC for data error detection.


The quad boards which made up the RK8E were the M7104, M7105 and M7106; they plug into an OMNIBUS backplane.

See also