Appendix C Functional Description C-19
C.1.9 Other RMA Storage Device X-Options
The system unit supports other RMA storage device X-options that can be installed
in the system unit in lieu of the CD-ROM drive. These storage device X-options
include the 4-GByte 4-mm DDS and DDS3 tape drives, the 12-GByte 4-mm DDS3
tape drive, the 8705XDX, 7-GByte tape drive, and the SLR5 QIC tape drive. For a
listing of all X-options, refer to the product guide.
C.1.10 Keyboard and Mouse, Diskette, and Parallel Port
The keyboard and mouse, diskette, and parallel port interfaces are managed by the
SuperIOcomponent. FIGURE C-6 showskeyboard, diskette, and parallel port interface
functionality.For a brief description of the SuperIO, see Section C.1.16, “SuperIO” on
pageC-36.

C.1.10.1 Keyboardand Mouse Port

The keyboard and mouse are connected to an 8-pin DIN connector,located on the
motherboard, andto two serial ports on the SuperIO component. Each serial port on
the SuperIO ASIC provides 16-byte FIFO buffering. Data is asynchronously
exchanged with the keyboard and mouse at 1200 baud. Keyboard current is limited
to 700 milliamperes (mA) by a resettable fuse. Only the Sun Type-5keyboard is
supported.