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PERQ
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===Peripherals=== Various optional OIO boards were produced for the PERQ 1 and 2: 3RCC OIO boards provided a 16-bit parallel PERQlink interface (intended for downloading microcode from another PERQ at boot time) plus Ethernet or a [[Canon Inc.|Canon]] CX [[laser printer]] controller. Thus, a PERQ 2 could be configured with two Ethernet ports (EIO plus OIO). A [[dot-matrix printer]] could also be connected to the RS-232 or IEEE-488 ports. Other third-party OIO boards were produced to interface to other devices, such as [[Quarter-inch cartridge|QIC]]-02 [[tape drive]]s or [[video camera]]s.<ref name="hardware-faq"/>
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