Chapte; Setting The Jumpe S On The 056A Boa D; Start Ddress Select Jumpers - Intel SYSTEM 310 Configuration Manual

CHAPTE 4
SETTING THE JUMPE S ON THE 056A BOA D
Like the 012B memory board, you can use the 056 memory board to
expand the System 310 R M space. This chapter describes the
jumpers that are preset by the factory and the jumpers you must
change to use this board.
The layout of the information in this chapter is similar to Chapter 3.
First, this chapter provides a list of jumper-controller parameters.
Then, it provides a master drawing of the board showing the location
of the jumpers in the drawing grouped into related categories. The
labeled categories become the topic for the next few sections, each
section repeating the significant portion of the master drawing to
show you which jumpers to change and where to find them.
JUMPER-SELEC ABLE PARAME ERS
By adding or removing jumpers, you can control the parameters listed
below. Since the System 310 does not usually contain an 056
memory board, you must configure this board yourself. Do not
remove any default jumpers unless you are directed to do so in this
manual or you have consulted the iSBC 016A/032A/064A/028A/056A
RAM Board Hardware Reference Manual and understand the effect of
the change.
Figure 4-1 shows four jumper areas found on the 056 memory board.
No jumper connections are shown. The names of the jumper areas
found in this figure are listed below, followed by a brief description.
Later sections of this chapter explain each area and the effect of
optional settings.
• Start ddress Select Jumpers — select the starting address of
memory
• Megabyte Page Select Jumpers — assign memory to one of 16
possible pages of memory, each 1 megabyte long
• Status/Error Register Jumpers — select the address of the
status/error register
• Interrupt Jumpers — permit a parity error to interrupt the CPU
Only two of these jumper areas, the address select and the
status/error register jumpers, control parameters you are likely to
change when using this board in an 86-based System 310. They are
discussed at length in this chapter. The other two areas shown in
Figure 4-1, the interrupt jumpers and the megabyte page select
jumpers, are only briefly covered in this manual. See the iSBC
016A/032A/064A/028A/056A RAM Board Hardware Reference
Manual listed in the Preface for more information.
4-1