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SM
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Instra
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EPC - 7
Hardware Reference
®
RadiSys Corporation
15025 S.W. Koll Parkway
Beaverton, OR 97006
Phone: (503) 646-1800
FAX: (503) 646-1850
______________________________________________________________________
07-0103-02 September 1994
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EPC-7 Hardware Reference
EPC and RadiSys are registered trademarks and EPConnect is a trademark of
RadiSys Corporation. OS/2, IBM, EGA, PS/2, and PC/AT are trademarks of
International Business Machines Corporation. 386 and 486 are trademarks of Intel
Corporation. Microsoft and MS-DOS are registered trademarks of Microsoft
Corporation.
February 1992
Copyright ©1992, 1994 by RadiSys Corporation
All rights reserved.
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EPC-7 Hardware Reference
Hardware Warranty
RadiSys Corporation ("RadiSys") warrants the EPC system and component modules
to the original purchaser for two years from the product's shipping date. If an EPC
product fails to operate in compliance with its specification during this period,
RadiSys will, at its option, repair or replace the product at no charge. The customer
is, however, responsible for shipping the product; RadiSys assumes no responsibility
for the product until it is received. This warranty does not cover repair of products
that have been damaged by abuse, accident, disaster, misuse, or incorrect installation.
RadiSys' limited warranty covers products only as delivered. User modification, such
as the addition of memory arrays or other devices, may void the warranty, and if the
product is damaged during installation of the modifications, this warranty does not
cover repair or replacement.
This warranty in no way warrants suitability of the product for any specific
application.
IN NO EVENT WILL RADISYS BE LIABLE FOR ANY DAMAGES,
INCLUDING LOST PROFITS, LOST SAVINGS, OR OTHER INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY
TO USE THE PRODUCT EVEN IF RADISYS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY PARTY
OTHER THAN THE PURCHASER.
THE ABOVE WARRANTY IS IN LIEU OF ANY AND ALL OTHER WAR-
RANTIES, EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE OR USE, TITLE AND NONINFRINGEMENT. Repair or replacement
as provided above shall be the Purchaser's sole and exclusive remedy and RadiSys'
exclusive liability for any breach of warranty.
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EPC-7 Hardware Reference
NOTES
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EPC-7 Hardware Reference
Contents
1. Product Description............................................................................................1
Specifications....................................................................................................2
2. Before Installation..............................................................................................5
Configuring the EPC-7 Jumpers.......................................................................5
Slot 0 and System Controller Configuration............................................5
Installing the VXIbus Backplane Jumpers........................................................7
3. Installation ..........................................................................................................11
EPC-7 Insertion.................................................................................................11
EXM Module Insertion.....................................................................................11
Connecting Peripherals to the EPC-7................................................................12
Monitor.....................................................................................................12
Keyboard..................................................................................................12
Serial Port.................................................................................................13
Parallel Printer Port..................................................................................13
SCSI Port..................................................................................................13
External Clock Input ................................................................................14
External Clock Output..............................................................................14
External Trigger .......................................................................................14
4. Configuring the BIOS Setup.............................................................................15
Power-On Screen Display.................................................................................15
BIOS Setup Screen ...........................................................................................16
EXM Configuration..........................................................................................18
Fixed Disk Menu ..............................................................................................20
User-Definable Drive Types ....................................................................22
Disk Formatting................................................................................................23
Low-level IDE (AT) Disk Formatting......................................................23
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EPC-7 Hardware Reference
5. Theory of Operation...........................................................................................25
Memory Map ....................................................................................................26
Processor and Memory .....................................................................................27
Cached and Uncached Addresses.............................................................27
ROM and ROM Shadowing..............................................................................27
SCSI Controller.................................................................................................28
Floppy Disk Controller.....................................................................................28
IDE Disk Interface............................................................................................29
Battery...............................................................................................................29
Watchdog Timer ...............................................................................................30
EXM Expansion Interface.................................................................................31
VXIbus Interface...............................................................................................31
Slot 0 and System Controller Functions ...........................................................32
Reset Behavior..................................................................................................32
Printed Circuit Board........................................................................................34
6. Connectors ..........................................................................................................35
VXI Signal Usage.............................................................................................38
Floppy Connector .............................................................................................42
7. VXIbus Interface................................................................................................43
Concepts............................................................................................................43
Memory Map............................................................................................43
Direct VMEbus Accesses.........................................................................44
Byte Ordering...........................................................................................45
Slave Accesses from the VMEbus ...........................................................48
Self Accesses Across the VMEbus...........................................................48
Read-Modify-Write Operations ...............................................................49
VMEbus Interrupt Response....................................................................50
Registers Specific to EPC-7..............................................................................50
Register State after Reset..........................................................................66
VXIbus Mapped Registers................................................................................67
Supported Address Modifiers...........................................................................68
Low-Level Programming the VMEbus Interface .............................................68
VMEbus Accesses....................................................................................68
VXIbus Interrupt Handler.................................................................................71
Read-Modify-Write Operations ...............................................................74
Soft Reset and VME Sysreset...........................................................................74
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EPC-7 Hardware Reference
8. Upgrades..............................................................................................................77
Memory.............................................................................................................77
9. Troubleshooting & Error Messages..................................................................81
Troubleshooting................................................................................................81
Common Error Messages..................................................................................84
SCSI related problems..............................................................................89
10. Support and Service..........................................................................................91
Appendix A: Interrupts and DMA Channels........................................................A-1
Appendix B: I/O Map..............................................................................................B-1
Appendix C: Using the EPC-7 AM........................................................................C-1
Index.........................................................................................................................I-1
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EPC-7 Hardware Reference
Figures Figure 1. EPC-7 Configuration Jumpers................................................. 6
Figure 2. Daisy-Chain Signal Concept..................................................... 7
Figure 3. VXIbus Backplane Jumper Examples ...................................... 8
Figure 4. VXIbus Jumpers or DIP Switches on Front of Chassis............ 9
Figure 5. VXIbus Jumpers on Rear Wirewrap Pins..................................9
Figure 6. Power-on Screen Display.........................................................15
Figure 7. Main Setup Screen...................................................................16
Figure 8. EXM Setup Screen...................................................................19
Figure 9. EXM Slot Numbering..............................................................19
Figure 10. Fixed Disk Menu ...................................................................21
Figure 11. Location of Disk Drive Label................................................22
Figure 12. Data Path Block Diagram ......................................................25
Figure 13. EPC Battery Location............................................................29
Figure 14. Battery Removal....................................................................30
Figure 15. PCB Layout ...........................................................................34
Figure 16. Little-Endian Byte Order .......................................................46
Figure 17. Big-Endian Byte Order..........................................................47
Figure 18. Location of SIMM Sockets....................................................79
Tables Table 1. EPC-7 Environmental Specs With No Internal Disk Drives.......2
Table 2. EPC-7 Environmental Specs With Floppy and Hard Drives ......3
Table 3. Additional EPC-7 Specifications ................................................4
Table 4. Fixed Disk Configuration Example...........................................23
Table 5. Physical Address Space Mapping.............................................26
Table 6. DB-9 Pinout ..............................................................................35
Table 7. COM2 10-Pin Header Pinout....................................................35
Table 8. DB-25 LPT1 Pinout ..................................................................36
Table 9. Keyboard Connector Pinout......................................................36
Table 10. SCSI Port Pinout.....................................................................37
Table 11. Speaker Header Pinout............................................................38
Table 12. VXIbus Signal Usage..............................................................39
Table 13. VXIbus P2 Connector.............................................................40
Table 14. P1 Connector Pinout ...............................................................41
Table 15. 34-Pin and 26-Pin Floppy Connector Pin-outs .......................42
Table 16. A16 Register Mapping............................................................67
Table 17. Supported Address Modifiers .................................................68
Table 18. Interrupt Assignments............................................................A1
Table 19. DMA Channels.......................................................................A2
Table 20. I/O Map..................................................................................B5
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11
1. Product Description
This manual contains all the information needed to install and use the EPC-7 VXIbus
embedded computer. Additional user and programmer manuals discuss the use of the
EPConnect software package designed to work with the EPC-7.
The EPC-7 is a C-size VXIbus embedded computer based on the Intel 486 processor.
It can perform 8-, 16-, and 32-bit VXIbus data transfers, both as master and slave,
and can be the slot-0 and system controller and resource manager. The EPC-7 can be
an interrupter and interrupt handler, and can drive and sample the TTL and ECL
trigger lines.
The EPC-7 is compatible with the IBM PC architecture and contains standard front-
panel connectors for PC serial and parallel ports. The keyboard port is PS/2 style. In
addition, the front panel contains a SCSI-2 port and cable connectors for external
clock and trigger signals.
Depending on the model, the EPC-7 contains three or four front-panel expansion slots
for EXM modules. Also, the particular model of the EPC-7 will determine such
attributes as the speed of the 486 processor, the size of the internal hard disk, the
amount of the DRAM memory, and whether a floppy diskette drive is present.
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