012B Jumpers For - Intel SYSTEM 310 Configuration Manual

System 310
012B Board Jumpers
Since it is not efficient to use the 304 board as part of this
combination, use the 056 and the 012B boards instead.
ddress the
256K bytes of R M on the 056 board from 20000H to 5FFFFH.
Table 1-1 shows that the 056 board usually occupies this space in
the System 310. See Chapter 4 for jumpering instructions for the
056 board.
To jumper the 012B board so it occupies the top of the 896K-byte
block of contiguous memory (60000H through DFFFFH), remove or
connect the jumpers listed in Table 3-3.
Note: "X" means connected to ground. means not connected.
Table 3-3. 012B Jumpers for ddress Range 60000H-DFFFFH
Upper Bound Lower Bound
Jumper Connection Jumper Connection
7-15
—
23-24 X
8-16
—
25-26
x
9-17
—
27-28
X
10-18
X VJ'Zc?
29-30
—
11-19
—
31-32
—
12-20
—
33-34
X
13-21
X wzj
35-36
X ^'3 !
14-22
X
37-38
x
COMBINA ION 8 — HE 012B, PROCESSOR, 304, AND 056A BOARDS
To fully expand memory to 960K bytes, you must use all the boards
mentioned in this manual. Locate the processor board's memory at
the lowest address, followed by the memory on the 304 board. Then,
fill the next highest space, from 4000 OH through 7FFFFH, with the
056
board. Top off the block with the 012B board, ranging from
80000H through EFFFFH.
To address these boards, refer to Chapter 4 for the jumper changes to
the 056 board. Table 3-4 shows how to jumper the 012B board for
these combination-8 addresses.
s an aside, notice that the total number of bytes available using this
combination of boards is 1024K. However, the 86-based System 310's
only allow 960K bytes of R M total. Therefore, this board
arrangement does not use all of the available R M on the 012B
memory board.
3-5