Tape Controller Multibus Memory; Table 8-6 Selecting Quarter-Inch Tape Controller Memory Base - Sun Microsystems Sun Workstation 100U System Manager's Manual

Hardware Configuration and Expansion
Sun 100/150 Installation Manual
8.9.1. Tape Controller Multibu8 Memory
This subsection is irrelevant to you if you are using your 1/4" tape controller board with a
Sun-2 CPU; the tape controller Multibus memory is unnecessary with such a configuration, and
must
be disabled as described above.
If you need to make use of the 256 KBytes of Multibus memory on the tape controller board,
select the base address for the memory as follows.
Memory on the tape controller board comes in 128K byte chunks; there are two of these chunks.
The chunk(s) of memory may be located on a 128K byte boundary anywhere within a one
Megabyte address space by dosing appropriate switches on package U 50.
With the Multibus connectors facing you, the four switch packages are in the lower left hand
corner of the board, at component locations U52, U50, U53, and U56. U52 is in the lower left-
hand corner of the board; U50 is directly above U52. For each package, switch *1 is on the
right and switch *8 is on the left.
Two adjacent switches on U50 should be dosed. This places the 256K bytes of memory on the
0, 128K, 256K, 384K, 512K, 640K, or 768K boundaries. All other switches on package U50
should be opened.
If all switches on U50 are opened, all memory accesses to the tape controller board are disabled.
The table below illustrates the switch settings in detail.
Table 8-6: Selecting Quarter-Inch Tape Controller Memory Base Address
For
256K
Byte Tape Controller Boards
Olo'ing Select, Addre" RtJnge
Switch
DecimtJl H eZtJdecimtJl
Number.
8 and 7 0 - 256K-l OxO - Ox3FFFF
7 and 6
128K - 384K-l Ox20000 - Ox5FFFF
6 and 5 256K - 512K-l Ox40000 - Ox7FFFF
5 and 4 384K - 640K-1
Ox60000 - Ox9FFFF
4 and 3 612K - 768K-l
Ox80000 - OxBFFFF
3 and 2 640K - 896K-l
OxAOOOO - OxDFFFF
2 and i 768K -
IM·l OxCOOOO - OxFFFFF
8.10. 300M
Ethernet Controller Board
A Sun-l Workstation in a networked environment is currently supplied with a 300M 3C4OO
Ethernet Controller Board. The 3COM Ethernet controller is a memory-mapped device in the
Sun Workstation. There are several jumpers that should already be set correctly when the Con-
troller leaves the factory. Correct settings of the jumpers and switches for the Sun environment
are as follows:
8-16
Revision H of 12 March 1984