Radstone PME 68-1B User manual

PME 68-1B Manual
Rev. 2
Issue 5
Publication No. 421/HH/23144/000
Radstone Technology plc
Water Lane,
Towcester,
Northants.,
NN12 7JN
Telephone: [phone]
Telex: 31628 RADSTN G
© Radstone Technology plc 1990
Issue 1 © The Plessey Company plc 1985
Issue 2 © The Plessey Company plc 1987
Issue 3 © The Plessey Company plc 1988
Issue 4 © Radstone Technology plc 1989
This publication is issued to provide outline information only which (unless agreed by the
Company in writing) may not be used, applied or reproduced for any purpose or form part
of anyorder or contract or be regarded as a representation relating to products or services
concerned.The Companyreservesthe right to alter without notice the specification,design,
price or conditions of supply of any product or service.
January 1990

Trademarks
RADSTONE the RADSTONE symbol, PME, and PLUM are trademarks of
Radstone Technology plc.
VERSAdos is a trademark of Motorola.
Board Identification
All Radstone baoards can be identified by a label fitted to the component side of P1.
This publication describes the PME 68-1B at Revision state Rev.2 (all letter codes).
Unique board serial number
MADE IN ENGLAND SERIAL NUMBER REV NO.
Drawing list number, used
during manufacture
Part/variant number, all PME
board numbers begin with 421/1/
so this is not shown
Revision number,
e.g. C or 2F, revision
1 number is not shown

Table of Contents
Chapter 1 - Introduction
Introduction ......................................................................................................... 1
Operational Overview ........................................................................................ 7
Features .......................................................................................................... 7
I/O Facilities .................................................................................................. 8
Memory .......................................................................................................... 8
R eal Time Operation ................................................................................... 8
Chapter 2 - Specification
G eneral ................................................................................................................. 9
Operating.............................................................................................................. 10
MTBF .................................................................................................................... 10
Storage .................................................................................................................. 10
Chapter 3 - Functional Description
H ardware Overview ............................................................................................ 11
Front Panel .................................................................................................... 11
68000 Hardware Description ...................................................................... 12
Processor ........................................................................................................ 12
Memory................................................................................................................. 14
R AM Area ..................................................................................................... 15
R AM R efresh ................................................................................................ 15
Local I/O and Control Devices.......................................................................... 18
Serial I/O ....................................................................................................... 18
Terminal Interface ........................................................................................ 18
Address Assignment of Terminal Interface ............................................. 20
R emote Interface .......................................................................................... 20
Address Assignment - R emote Interface .................................................. 21
H ost Interface ................................................................................................ 21
Address Assignment - H ost Interface ........................................................ 22
Serial I/O Interface Summary ..................................................................... 24
ACIA Access Time ...................................................................................... 25
R eal Time Clock.................................................................................................. 26
Addressing the R TC ..................................................................................... 26
R TC Interrupts .............................................................................................. 27
R TC Summary .............................................................................................. 27
Parallel I/O Interface .......................................................................................... 28
PI/T Addressing............................................................................................. 28
PI/T Interrupts ............................................................................................... 29
Centronics Type Interface ........................................................................... 30
PI/T Summary ............................................................................................... 30
Interrupt H andling .............................................................................................. 31
On-board Interrupt Sources ........................................................................ 31
Software ABO RT Switch ............................................................................. 32
ACFAIL ......................................................................................................... 32
Interrupt E xception Sequence .................................................................... 32
VME bus Interrupt H andling....................................................................... 35
PME68-1B Manual
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VME bus Arbitration .................................................................................... 36
U sing PME 68-1B as the System Bus Arbiter........................................... 37
Bus R elease Functions ................................................................................ 38
VME BU S Interface ........................................................................................... 39
SYSCLK Signal ............................................................................................ 39
SYSR ESET* Signal ...................................................................................... 39
R ESE T Switch ............................................................................................... 39
SYSFAIL* Signal .......................................................................................... 39
Address Modifier Codes .............................................................................. 39
Function Codes ............................................................................................. 41
Short I/O Address Modifier Code .............................................................. 41
Bus E rror Function ....................................................................................... 41
Connectors ........................................................................................................... 42
VMEbus P1 Connector ................................................................................ 42
P2 Pin Assignments....................................................................................... 43
P3 Pin Assignments ...................................................................................... 44
P4/P5 Pin Assignments................................................................................. 44
Chapter 4 - Configuration
Preparation For U se ........................................................................................... 45
Fitting a Battery................................................................................................... 45
Link Settings ........................................................................................................ 47
R AM/PR OM/E PR OM Area............................................................................. 52
System Area ................................................................................................... 52
System Connections...................................................................................... 52
U ser Area ....................................................................................................... 54
Access Speed Select ...................................................................................... 56
Local I/O and Control Devices.......................................................................... 57
Terminal Interface ........................................................................................ 57
R emote Interface .......................................................................................... 58
H ost Interface ................................................................................................ 59
Baud R ate Selection ..................................................................................... 60
R TC Interrupts .................................................................................................... 62
Parallel I/O Interface and Timer ....................................................................... 63
Centronics Type Interface ........................................................................... 63
Interrupt H andling .............................................................................................. 66
ACFAIL Interrupt ........................................................................................ 66
VME bus Interrupt H andling....................................................................... 66
VME bus Arbitration........................................................................................... 67
On-Board D TB Slave Bus Arbitration....................................................... 67
Off-Board Arbitration .................................................................................. 68
Bus-R elease Functions ................................................................................ 68
VME BU S Interface ............................................................................................ 69
SYSCLK Signal ............................................................................................. 69
SYSR ESET* Signal ...................................................................................... 69
SYSFAIL* Signal .......................................................................................... 70
BCLR * Signal ................................................................................................ 70
Short I/O Address Modifier Code .............................................................. 71
Bus E rror Function ....................................................................................... 73
PME68-1B Manual
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Chapter 5 - PME68/Monitor
Software Capabilities.......................................................................................... 75
G eneral System O verview.................................................................................. 77
Power-U p Sequence ..................................................................................... 77
R ESE T Switch ............................................................................................... 77
ABOR T Switch .............................................................................................. 77
Vectors and E rrors........................................................................................ 78
Interrupt Level Assignment......................................................................... 79
Return to the Monitor .................................................................................. 80
The H ALT Indicator .................................................................................... 80
PME68/Monitor Memory Map ................................................................... 81
Operation of the PME 68/Monitor .................................................................... 82
System Operation .......................................................................................... 82
Terminal Control Characters ...................................................................... 83
Command Line Format ................................................................................ 83
Monitor Commands ............................................................................................ 85
BLO CK FILL ME MOR Y .....................................................BF ................ 86
BLO CK MOVE .....................................................................BM ............... 86
G ET/DISPLAY BR EAKPO INT ........................................BR ............... 87
BLO CK SE AR CH ..................................................................BS ................ 88
BLO CK TE ST OF ME MOR Y ............................................BT ................ 89
DATA CO NVE RSION ........................................................DC ............... 89
DU MP ME MO RY ................................................................DU ............... 90
G O E XE CU TE PR OG RAM ...............................................G O ............... 91
GO DIRECT TO EXE CUTE PROG RAM ......................GD ............... 91
G O U NTIL BR EAKPOINT ................................................G T ............... 92
H ELP ........................................................................................H E ............... 93
LOAD OBJECT FILE ..........................................................LO ............... 94
MEMORY DISPLAY ...........................................................MD .............. 95
ME MOR Y MODIFY ............................................................MM .............. 96
ME MOR Y SE T .....................................................................MS ............... 98
R EMOVE BR EAKPOINT ...................................................NO BR ......... 98
DE TACH PR INTE R ............................................................NOPA ......... 99
OFFSET ...................................................................................OF ................ 99
ATTACH PR INTE R ............................................................PA ................ 100
POR T FOR MAT ...................................................................PF ................ 100
TR ANSPAR ENT MODE ....................................................TM ............... 101
TR ACE ....................................................................................TR ............... 102
TR ACE TO TE MPO RAR Y BR EAKPO INT ..................TT ................ 103
VE RIFY ..................................................................................VE ............... 104
DISPLAY/SE T R EG ISTE R ................................................A0 - .A7....... 105
MEMORY DISPLAY DISASSEMBLER ........................MD ...;DI ....105
MEMORY MODIFY DISASSEMBLER/ASSEMBLER MM...;DI ..106
U sing the Assembler/Disassembler .................................................................. 107
Introduction ................................................................................................... 107
68000 Assembly Language ........................................................................... 107
Directives ....................................................................................................... 108
Source Program Coding ............................................................................... 108
Disassembled Source Line ........................................................................... 108
PME68-1B Manual
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Mnemonics and D elimiters ......................................................................... 109
Character Set ................................................................................................. 110
Source Code Format..................................................................................... 110
Assembler Language Format ...................................................................... 110
DC.W D efine Constant Directive .............................................................. 112
Entering and Modifying Source Programs ................................................ 112
Calling the Assembler/Disassembler ......................................................... 112
Program Input................................................................................................ 113
Disassembled Program Listings .................................................................. 113
Saving Programs ............................................................................................ 114
Download from a H ost ................................................................................. 114
U ser Application Software E xamples .............................................................. 116
Data Transfer (From and To) an ACIA........................................................... 116
Output of One Line to the RE MOTE ACIA ........................................... 116
Input of One Line from the Remote ACIA ............................................. 117
Initialisation of the Real-time Clock ................................................................118
Address Assignment of I/O Devices ................................................................. 119
6850 ACIA ( Terminal ) ............................................................................... 119
6850 ACIA ( H ost )....................................................................................... 119
6850 ACIA (Remote) ................................................................................... 119
68230 PI/T (Parallel Interface/Timer) .................................................... 120
58167A RTC (R eal Time Clock) .............................................................. 121
Error Messages and Monitor Messages ........................................................... 122
E rror Message ............................................................................................... 122
Monitor Messages ......................................................................................... 122
Addresses of the Main System R outines ......................................................... 123
S-R ecord Format ................................................................................................. 124
PME68-1B Manual
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Chapter 1 - Introduction
The PME 68-1B CPU is a single board computer which combines a powerful 16 bit mi-
croprocessor, the Motorola 68000, with 128k or 512k bytes of dynamic RAM (DRAM),
up to 256k bytes of EPROM or EPROM + SRAM, a programmable real time clock,
plus three serial and one parallel input/output (I/O) interfaces. It provides reliable, high
speed processing at low cost, in addition to providing 3 interfaces; typically two would be
used for a host computer and terminal, and the third for a remote interface for a second
terminal, printer, or back-up peripheral.
Access to all these on-board devices is provided by an EPROM resident Monitor,
(PME68 or PLUM) which is supplied with the board. This powerful software package
can be used for program development and debugging.
The PME 68-1B is supported by Radstone VERSAdos operating system. This software
provides for Realtime, Multiuser, Multitasking systems.
The PME 68-1B is a sophisticated VMEbus CPU board which may be used in a multi-
processor environment. It may also be used as a single board computer using its on-
board I/O and timer functions.
Vari ants
The nature of the board variant is indicated by the last three digits of the part number.
e.g. ---/-/-----/XXX
The first digit:
/1XX= Standard board with PME68/Monitor
/2XX= VERSAdos + VERSAdos support with PLUM Monitor
/3XX= Special Variants
The third digit identifies processor speed and DRAM combination:
XX0 = 68000 8 MHz. 128k DRAM
XX1 = 68000 10 MHz. 128k DRAM
XX2 = 68000 8 MHz. 512k DRAM
XX3 = 68000 10 MHz. 512k DRAM
PME 68-1B Manual
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Figure 1 The PME 68-1B Board
Photograph not available in PDF
PME 68-1B Manual
Page 2 Issue 5

PME68-1B is available with an 8 MHz or 10 MHz, 68000 CPU and various capacities of
DRAM. The standard variants are:
Order No. Description Part No.
PME68-1B/100 8 MHz 68000, 128k bytes of DRAM 421/1/23144/100
PME68-1B/101 10 MHz 68000, 128k bytes of DRAM 421/1/23144/101
PME68-1B/102 8 MHz 68000, 512k bytes of DRAM 421/1/23144/102
PME68-1B/103 10 MHz 68000, 512k bytes of DRAM 421/1/23144/103
This manual provides a general operating description of all variants of the PME 68-1B
and includes information for installation and troubleshooting in Chapter 4, plus details
of the PME68/Monitor in Chapter 5.
Certain ‘application specific’ boards are factory configured for individual users. For rea-
sons of confidentiality, detailed reference is not made to these boards, but default (fac-
tory set) link information is given.
Details of the 68000 Processor and the Parallel I/O Interface and Timer are given in the
respective Motorola data sheets available on request from your supplier.
Accessing the VME bus after a power-up reset
Occasionally, after a power-up reset, access to the VME bus may be denied. To over-
come this feature a dummy access to any PIT register should be made prior to accessing
the VME bus.
WARNING: See Chapter 4 before installing the battery.
PME 68-1B Manual
Page 3 Issue 5

Figure 2 The PME 68-1B Front Panel
RESET
ABORT
HALT LED
REMOTE
TERMINAL
HOST
Port 3
(P5)
Port 1
(P4)
(P3)
Port 2
PME 68-1B
RADSTONE
TECHNOLOGY
PME 68-1B Manual
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