Chapter 3 Functional Description 3-7
use an external clock. To use Channel-A, connect a standard 25 pin terminal cable to
the DTE. To use Channel-B, connect the standard 25 pin terminal cable to the “B”
end of the “Y” splitter cable, see A.4.2 on page A-27. Using the “Y” splitter cable it is
possible to use both channels simultaneously. Implemented using Seimens SAB8223
on the EBus2, with full interrupt support. During system power up, if no keyboard
or video interface is found, the system defaults to communicate through TTY-A
(Channel-A of the ComPorts).
3.3.7 Printer Port
A parallel interface for printers is provided on this port (J0901) and is compliant
with IEEE1284. It is implemented to work in DMA mode for high throughput and
works with all standard printers when used with a cable of the recommended type
and length. Super IO chip NS87307 provides the interface circuitry.
3.3.8 Sun Keyboard and Mouse
The standard Ultra AXi motherboard supports the Sun type 5 keyboard (SunExpress
Part No. 320-1234) and mouse (SunExpress Part No. X494A). This keyboard uses the
8 pin DIN connector (J0902) located on the rear panel. See A.3.13 on page A-25. The
Sun Keyboard has a speaker for “beep” signals built in. Localization for other
language keyboard is supported by Solaris. Consult the Solaris documentation for
specific details. Super IO chip NS87307 provides the interface circuitry.
3.3.9 PS/2 Keyboard and Mouse
Most types of PS/2 Keyboards and PS/2 Mouse devices are supported. The interface
connectors on the motherboard are J2500 for the PS/2 mouse header and J2501 for
the keyboard header. See A.2.3 on page A-5 and A.2.4 on page A-5. The interface
signals are brought to the rear panel using a cable adapter detailed in A.4.1 on
page A-26. Keyboards of 84 keys, 101 keys, 102 keys and 104 keys layout are
supported. For details on keyboard mapping for different languages, consult the
Solaris documentation. While a mouse with one, two or three buttons are all
supported, most Solaris applications function best with a three button mouse. For
details on mouse button mappings, consult the Solaris documentation. Super IO chip
NS87307 provides the interface circuitry.
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