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INSTALLING
IE-488
BOARD
# 2
APPENDIX
E
The IE488
ROM Command Line
Interpreter
is designed
to handle
2
IE488 boards,
therefore
the ROM Interpreter
on the
second
board
must be disabled.
This
is done by the
removal
of U19 (74LS245).
This
will
disable
the
second
ROM. The user
is also
free
to use
this
ROM location
for
any programs
which
are to remain
permanent.
The address
decoding
may be set
to select
a different
16 k byte
block
of
memory.
There
is
12 Kbytes
of
ROM and
4 Kbytes
of
static
RAM which
the
Control-Alt-Del
reset
will
have
no effect
on. The user
may also
use the
last
2 Kbytes
of static
RAM on the
first
board
for
similar
programs
or a scratch
pad.
This
allows
maximum flexibility
for
a turn
key system
involving
up to 30 GPIB
selectable
devices.
When two
boards
are
used
the
DMA and
interrupt
vectors
must be different
or else
the boards
will
not
initialize
using
the SYSCON command. The user
may perform
a DMA
out
on board
1 and a DMA in on board
2 (or
vice-versa)
at
the
same time
without
conflict.
Page 42
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