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MPX-1
Lexicon MPX-1 User Manual
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41F6
77
MOV
M,A
;Store
it
external
41F7
C9
RET
jCommandto
set
the
interrupt
response
byte
41F8
3AA200
SETRSP:
LDA
SIRIAD
41FB
320780
STA
INIRSP
41FE
C9
RET
;Command
to
return
size
of
MPX1
(4K
or
16K).
If
4K
MPX1,
jsets
RESULT1
to
0,
if
16K
~~X1,
sets
RESULT1,
to
FFH
41FF
3AFt'OF
SIZE:
LDA
OFHH
4202
F5
PUSH
PSW
4203
3AH3F
LDA
3~'FFH
4206
F5
PUSH
PSW
4207
3EAA
MVI
A,OAAH
4209
32FFOF
STA
OFFFH
420C
3E55
MVI
A,55H
420E
32FF3F
STA
3FFFH
4211
3AFFOF
LDA
OFFFH
4214
FE55
CPI
55H
4216
CA1E42
JZ
IS4K
4219
3EFF
MVI
A,OFFH
;top
of
4K
RAM
;save
it
on
the
stack
;top
of
16K
RAM
;save
it
as
well
;is
it
4K?
25
27
Table of Contents
Table of Contents
2
Warning
4
About MPX-L
4
Technical Overview
4
How to Use the MPX-L
5
MPX-L Block Diagram
5
Local Address Map
6
Accessing Memory on the Bus
6
Accessing I/O Ports on the Bus
7
Getting the MPX-L Attention
7
Getting the Main System Cpu's Attention
7
Interrupt Acknowledge Response on the Bus
8
Hardware Switch Setting and Jumper Options
8
Switch Settings
8
Switch 1 - ATTN Port Address Select
8
Standard ATTN Port Address Selection
8
Swi Tch
8
Interrupt "CALL" Jumpers
9
Selecting and Using 4K or 16K RAM Chips
9
Using 2147 4K X 1 Type RAM Chips
9
Using 2167 16K X 1 Type RAM Chips
10
Configuring the MPX-L for Different Size EPROMS
10
Using a 2716 or 2732 EPROM
10
Using a 2764 EPROM
10
Standard Software Supplied with MPX-L
11
Basic Command Structure and Protocol
11
Opcode Byte
11
Status Indication Byte
12
Link Address Bytes
13
Result 1 and Result 2 Bytes
13
General Notes
13
Command Descriptions
14
NOP - no Operation
14
RESET - Reset the MPX-L
14
SET MASK - Mask or Unmask Interrupt Inputs to MPX-L
14
To Interrupt Controller
15
READREG - Read Interrupt Controller Registers
15
SETRESPONSE - Set Interrupt Response Byte
15
SIZE - Indicate Whether 4K or 16K MPX-L LOADRAM - Load MPX Local RAM from System RAM
16
EXRAM - Execute a Program in Local RAM
16
BLKMOV - Move Block of RAM of System Bus
17
FASTMOV - Move Block of RAM on System Bus - Fast
17
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Lexicon MPX-1 Specifications
General
Brand
Lexicon
Model
MPX-1
Category
Recording Equipment
Language
English
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