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Lexicon MPX-1 - Table of Contents

Lexicon MPX-1
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TABLE
OF
CONTENTS
WARNING
. 5
About
MPX-l 5
Technical
overview
5
How
to
use
the
MPX-l
••
6
MPX-l
block
diagram
6
Local
address
map
7
Accessing
memory on
the
bus
7
Accessing
I/O
ports
on
the
bus
•••••
8
Getting
the
MPX-l
attention
8
Getting
the
main
system
CPU's
attention
8
Interrupt
acknowledge
response
on
the
bus
••
9
Hardware
switch
setting
and jumper
options
9
Switch
settings
•••••
9
Switch
1 -
ATTN
port
address
select
9
Standard
ATTN
port
address
selection
9
Swi
tch
2
••
•••
9
Interrupt
"CALL"
jumpers
10
Selecting
and
using
4K
or
16K
RAM
chips
10
Using
2147
4K
x 1
type
RAM
chips
10
Using
2167
16K
x 1
type
RAM
chips
11
Configuring
the
MPX-l
for
different
size
EPROMS
••
••••
11
Using
a 2716
or
2732
EPROM
11
Using
a 2764
EPROM
11
Standard
software
supplied
with
MPX-l
12
Basic
command
structure
and
protocol
12
Opcode
byte
•••••••••••••
••
12
Status
indication-''byte
••
•••••
13
General
purpose
parameter
bytes
0
through
8
14
Link
address
bytes
14
Result
1
and
result
2
bytes
14
General
notes
••
••••••
14
Command
descriptions
••••
15
NOP
-
no
operation
15
RESET
-
reset
the
MPX-l
15
SET
MASK
- mask
or
unmask
interrupt
inputs
to
MPX-l 15
SENDDEOI
-
send
end-of-interrupt
command
to
interrupt
controller
READREG
-
read
interrupt
controller
registers
SETRESPONSE
-
set
interrupt
response
byte
SIZE -
indicate
whether
4K
or
16K
MPX-l
LOADRAM
-
load
MPX
local
RAM
from
system
RAM
EXRAM
-
execute
a
program
in
local
RAM
BLKMOV
-
move
block
of
RAM
of
system
bus
FASTMOV
-
move
block
of
RAM
on
system
bus -
fast
RESERV&p
-
opcode
3

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