Keyboard And Mouse, Diskette, And Parallel Port; Keyboard And Mouse Port; Figure C-6 Keyboard And Mouse, Diskette, And Parallel Port Functional Block Diagram - Sun Microsystems Ultra 80 Service Manual

C.1.9

Keyboard and Mouse, Diskette, and Parallel Port

The keyboard and mouse, diskette, and parallel port interfaces are managed by the
SuperIO component.
functionality. For a brief description of the SuperIO, see Section C.1.15 "SuperIO" on
page C-35.
C.1.9.1

Keyboard and Mouse Port

The keyboard and mouse are connected to an 8-pin DIN connector, located on the
motherboard, and to 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-6 keyboard is
supported.
Diskette drive
Mode select
Density sense
FIGURE C-6
FIGURE C-6
SuperIO
PCIO
ASIC
Serial
EBus
Diskette
controller
Keyboard and Mouse, Diskette, and Parallel Port
Functional Block Diagram
shows keyboard, diskette, and parallel port interface
Parallel
port
Keyboard
1
port
Mouse
2
edge connector
Parallel port
DB-25
EMI
filter
EMI
filter
Keyboard
& mouse
DIN-8
Diskette drive
Appendix -21