Sky Floating Point Board - Sun Microsystems Sun Workstation 100U System Manager's Manual

Sun 100/150 InstaUation Manual Hardware Configuration and Expansion
• The Ethernet controller should be set for 2().bit memory addressing. Look at the board
with the components up and the Multibus edge connectors facing you. At the lower left
corner of the board there are two jumpers labelled
JPl
and
JPe.
There should be a short-
ing jumper on JPe; there- should not be any shorting jumper on JP1.
• Just to
t~e
right of the address width selection jumpers, there is a row of jumper pins. The
pins marked MRD C and MWTC should have shorting jumpers installed. The pins marked
IORC and IOWC should not have any jumpers installed.
• Then there is a row of jumpers marked INT1 at one end, down to INTO at the other end;
these select the interrupt level. For the Sun Workstation, select interrupt level 3 - install
a shorting jumper on the fourth pair of jumper pins from the right-hand end of the row.
Remove the jumpers from all other INT{n) pins.
• The switch marked ADR11/ at the bottom right-hand corner of the board should have all
its keyswitches set to OFF.
• The switch marked ADR19/ in the lower left-hand corner of the board selects the memory
base address for the board. The Ethernet controller board consumes 8K bytes of M ultibus
memory space.
• The Sun Workstation expects to find the
jint
Ethernet board's memory at address
OxEOOOO. This address is selected by setting keyswitches 1, 2, and 3 on the switch
marked ADR19/ to ON and the other switches to OFF.
• The Sun Workstation expects to find the ,econd Ethernet board's memory at address
Oxe2000. This address is selected by setting keyswitches 1, 2, 3, and 7 on the switch
marked ADR19/ to ON and the other switches to OFF.
• In all cases, keyswitch 8 on the switch marked ADR19/ should always be OFF.
• In component position 12 on the Ethernet controller board there is a PROM which contains
the hardware Ethernet address for this board.
8.11. Sky Floating Point Board
In both the Model 100U and the Model 150U card cages, the Sky floating point processor may
be placed in any available slot which does not share a P2 bus section with any Sun board which
uses the P2 bus. The Sky board does IEEE format floating-point calculations much faster than
they can be done in software, and so makes many compute-intensive programs run significantly
faster.
To run in the Sun environment, the Sky board must be set to interrupt on level 2, and
configured for Multibus I/O address Ox2000. If you purchased your board from Sky, you must
set these parameters by rewiring pins at jumper block locations JP02 and JPOl, as follows:
• Holding the board with the Multibus edge connectors facing down (the location numbers on
the board will be right side up)) locate JP02 and JPOl: they are the two blocks with
exposed pins near the lower left-hand corner of the board. JP02 is the leftmost block. In
the following diagrams, we assume that the board is in this position.
Revision
11
of 12 March 1984
8-17