Motorola RAM104 User Manual
Motorola RAM104 User Manual

Motorola RAM104 User Manual

Processor/memory mezzanine module, dram memory module

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Motorola RAM104 User Manual

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Summary of Contents for Motorola RAM104

  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 PM603/PM604 Processor/Memory Mezzanine Module and RAM104 DRAM Memory Module User’s Manual PM603A/UM3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 While reasonable efforts have been made to assure the accuracy of this document, Motorola, Inc. assumes no liability resulting from any omissions in this document, or from the use of the information obtained therein. Motorola reserves the right to revise this document and to make changes from time to time in the content hereof without obligation of Motorola to notify any person of such revision or changes.
  • Page 4 The computer programs stored in the Read Only Memory of this device contain material copyrighted by Motorola Inc., first published 1990, and may be used only under a license such as the License for Computer Programs (Article 14) contained in Motorola’s Terms and Conditions of Sale, Rev.
  • Page 5 The safety precautions listed below represent warnings of certain dangers of which Motorola is aware. You, as the user of the product, should follow these warnings and all other safety precautions necessary for the safe operation of the equipment in your operating environment.
  • Page 6 Low Voltage Directive (73/23/EEC). In accordance with European Community directives, a “Declaration of Conformity” has been made and is on file at Motorola, Inc. - Computer Group, 27 Market Street, Maidenhead, United Kingdom, SL6 8AE. This board product was tested in a representative system to show compliance with the above mentioned requirements.
  • Page 7 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 8: Table Of Contents

    CPU Configuration Register................1-9 DRAM Size Register .................1-10 Memory Maps....................1-12 Installation........................1-12 ESD Precautions ....................1-12 Installation of PM603/PM604 on MVME160x ..........1-13 Installation of RAM104 on PM603/PM604 .............1-15 CHAPTER 2 Connector Pin Assignments Introduction........................2-1 Optional RISCWatch Header (J1)................2-1 CPU Connector (J2) ....................2-2 DRAM Expansion Connectors (J3 and J4) ..............2-6 Connector to MVME160x Main Module (J5) ............2-8...
  • Page 9 GLOSSARY Abbreviations, Acronyms, and Terms ..............GL-1 FIGURES Figure 1-1. Block Diagram of RAM104 and PM603/PM604 on Base Board ..1-4 Figure 1-2. Block Diagram of PM603/PM604 ............1-6 Figure 1-3. Installing PM603 or PM604 on MVME160x ........1-14 Figure 1-4. Installing RAM104 on PM603 or PM604 ..........1-16 TABLES Table 1-1.
  • Page 10: Introduction

    Optional 256 KB of level 2 (L2) secondary cache memory 8MB to 64MB shared DRAM on the PM603 or PM604. An additional 8MB to 64MB DRAM may be added as a RAM104 mezzanine that plugs into the PM603 or PM604...
  • Page 11: Model Designations

    Description Model Designations The PM603 and RAM104 are available in several models as shown in Table 1-1. Table 1-1. PM603, PM604, and RAM104 Model Designation Model Number Speed Major Differences PM603-032 200 MHz MPC603 MPU, 16MB DRAM, 256KB L2 cache...
  • Page 12: General Description

    General Description General Description The RAM104 is a DRAM Memory module that plugs into the PM603 and PM604 Processor/Memory mezzanine modules that plug into the MVME160x Single Board Computers (refer to Figure 1-1). For the processor/memory module, you initially have the choice of PowerPC 603 or PowerPC 604 with 8 to 64MB of DRAM.
  • Page 13: Figure 1-1. Block Diagram Of Ram104 And Pm603/Pm604 On Base Board

    NOTES : 1. SHADED BOXES ARE MVME1600-001 FEATURES ONLY. 2. SCSI CONTROLLER IS NCR-53C825 ON MVME1600-001, NCR-53C810 ON -011. 11186.00 9606 Figure 1-1. Block Diagram of RAM104 and PM603/PM604 on Base Board Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 14: Functional Description

    MVME160x-01y requires an MVME712M to connect it to SCSI, Ethernet, parallel, and/or serial peripherals. Functional Description The following sections describe the PM603, PM604, and RAM104 in detail. Figure 1-2 is a block diagram of the PM603/PM604. MPC603 Processor The PowerPC 603™ (MPC603) microprocessor offers workstation-level performance packed into a low-power, low-cost design ideal for embedded real-time control and monitoring applications.
  • Page 15: Figure 1-2. Block Diagram Of Pm603/Pm604

    Description RISCwatch CPU CONNECTOR MPC603/4 CLOCK MPU BUS GENERATOR OPTIONAL CACHE MPC105 BRIDGE 512Kx8 512Kx8 CSRs DRAM 8/32MB TO MVME160x BOARD DRAM 8/32MB DRAM EXPANSION CONNECTORS 11184.00 9610 (2-2) Figure 1-2. Block Diagram of PM603/PM604 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 16: Mpc105 Pci Bridge/Memory Controller

    Functional Description MPC105 PCI Bridge/Memory Controller The Motorola MPC105 device provides the necessary interface between the MPC603/604 processor, the EEPROM/Flash, the DRAM, and the PCI local bus. The MPC105 supports various PowerPC processor external bus frequencies up to 66 MHz and PCI frequencies up to 33 MHz. The...
  • Page 17: Dram

    PM604) as the processor. It is in one bank (8MB or 32MB) or two banks (16MB or 64MB), not interleaved, in 300 mil TSOP Type II packaging. An additional 8MB to 64MB of DRAM may be added as a RAM104-xxx memory mezzanine module that is plugged into the processor/memory module.
  • Page 18: Control And Status Registers

    I/O space. Note that in the OPER row, R = read only bit, R/W = read or write bit, and W = write only bit. Resistors on the RAM104 DRAM Memory module are read as part of the DRAM Size Register.
  • Page 19: Dram Size Register

    The DRAM Size Register is an 8-bit register providing the DRAM size information. Banks 0 and 1 are on the PM603/PM604; Banks 2 and 3 reside on the RAM104 DRAM add-on module. This register resides on the PM603/PM604 module but the actual address decoding is done by the MVME160x board.
  • Page 20 Functional Description SIZ2 - SIZ0 DRAM Size. These bits provide the DRAM size information for the four banks of DRAM supported by the PM603/PM604. The encoding for these size bits is as follows: B0/B1 (B2/B3) DRAM Size SIZ2 SIZ1 SIZ0 Bank 0 (Bank 2) Bank 1 (Bank 3) 32 MB (See note)
  • Page 21: Memory Maps

    Use manual for instructions on how to install the MVME160x into a backplane or system. ESD Precautions Motorola strongly recommends that you use an antistatic wrist strap and a Use ESD conductive foam pad when installing or upgrading a system. Electronic components, such as disk drives, computer boards, and memory modules, can be extremely sensitive to ESD.
  • Page 22: Installation Of Pm603/Pm604 On Mvme160X

    Installation Installation of PM603/PM604 on MVME160 x To install a PM603 or PM604 mezzanine on an MVME160x module, refer to Figure 1-3 and perform the following steps: 1. Attach an ESD strap to your wrist. Attach the other end of the ESD strap to the chassis as a ground.
  • Page 23: Figure 1-3. Installing Pm603 Or Pm604 On Mvme160X

    Description PM603/PM604 11197.00 9411 (1-2) Figure 1-3. Installing PM603 or PM604 on MVME160 x 1-14 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 24: Installation Of Ram104 On Pm603/Pm604

    AC or DC power source. Turn the equipment power on. Installation of RAM104 on PM603/PM604 The RAM104 DRAM mezzanine mounts on top of the PM603 or PM604 processor/memory mezzanine. To install a RAM104 mezzanine, refer to Figure 1-4 and proceed as follows: 1.
  • Page 25: Figure 1-4. Installing Ram104 On Pm603 Or Pm604

    Description RAM104 PM603/PM604 11197.00 9411 (2-2) Figure 1-4. Installing RAM104 on PM603 or PM604 1-16 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 26 5. Pick up the RAM104 mezzanine module, and note the positions of the male guide pins on the RAM104 connectors J1 and J2 at its left and right edges. Also note the positions of the female guide pins on the PM603/PM604 connectors.
  • Page 27 Press the mezzanine down with both thumbs until the RAM104 and the PM603/PM604 click together. 9. Visually verify that the connectors are fully seated. Connectors J2 and J1 at the left and right edges of the RAM104 should be connected with the corresponding connectors J3 and J4 on the PM603/PM604.
  • Page 28: Introduction

    2Connector Pin Assignments Introduction This chapter provides connector pin assignments for all connectors on the PM603/PM604 boards and the RAM104 board. Optional RISCWatch Header (J1) Signals are routed to the pin locations for a 16-pin male 2x8 header J1 (not provided) for connecting to the RISCWatch 603 processor interface.
  • Page 29: Cpu Connector (J2)

    Connector Pin Assignments Table 2-1. RISCWatch Header J1 (Continued) Header J1 MPC603 Pin No. MPC603 Signal Name Resistor Pin No. (240-pin QFP) CHECKSTOP 10K pullup Note QACK_ signal on the MPC603 has a 1K-ohm pull-down resistor to allow the MPC603 processor to enter the state required for reading and writing SCAN string data.
  • Page 30 CPU Connector (J2) Table 2-2. CPU Connector Pin Assignments (J2) (Continued) PA20 PA21 PA22 PA23 PA24 PA25 PA26 PA27 PA28 PA29 PA30 PA31 PA_PAR0 PA_PAR1 PA_PAR2 PA_PAR3 ∗ ∗ RSRV PD10 PD11 PD12 PD13 PD14 PD15 PD16 PD17 PD18 PD19 PA20 PD21 PD22...
  • Page 31 Connector Pin Assignments Table 2-2. CPU Connector Pin Assignments (J2) (Continued) PD42 PD43 PD44 PD45 PD46 PD47 PD48 PD49 PA50 PD51 PD52 PD53 PD54 PD55 PD56 PD57 PD58 PD59 PD60 PD61 PD62 PD63 PDPAR0 PDPAR1 PDPAR2 PDPAR3 PDPAR4 PDPAR5 PDPAR6 PDPAR7 No Connection No Connection...
  • Page 32 CPU Connector (J2) Table 2-2. CPU Connector Pin Assignments (J2) (Continued) ∗ No Connection ∗ No Connection ∗ No Connection ∗ No Connection ∗ TCLK_OUT CPUGNT ∗ ∗ L2PRSNT0 CPUREQ ∗ ∗ L2ADSC IBCINT ∗ ∗ L2BAA MCHK ∗ ∗ L2DIRTYI ∗...
  • Page 33: Dram Expansion Connectors (J3 And J4)

    J3 and J4 are two 100-pin SMT connectors on the PM603/PM604 Processor/Memory mezzanine that interface with J2 and J1 (respectively) on the RAM104 add-on DRAM mezzanine. Pin assignments for connectors J3 and J4 are shown in Tables 2-3 and 2-4.
  • Page 34: Table 2-4. Pin Assignments For Connector J3

    DRAM Expansion Connectors (J3 and J4) Table 2-4. Pin Assignments for Connector J3 ∗ BWEB3 BMD48 BMD24 BMD49 BMD25 BMD50 BMD26 BMD51 +3.3V BMD27 +3.3V BMD52 BMD28 BMD53 BMD29 BMD54 BMD30 BMD55 +3.3V BMD31 +3.3V BMD56 BMD32 BMD57 BMD33 BMD58 BMD34 BMD59 +3.3V...
  • Page 35: Connector To Mvme160X Main Module (J5)

    Connector Pin Assignments Connector to MVME160 x Main Module (J5) The PM603/PM604 Processor/Memory mezzanine module interfaces with the MVME160x main module through a 152-pin AMP Mictor SMT connector. This connector provides power to the PM603/PM604 module and the PCI interface between the two boards. The PCI clocks are received from the PM603/PM604 module which determines the PCI frequency of operation.
  • Page 36 Connector to MVME160x Main Module (J5) Table 2-5. Pin Assignments for Connector J5 (Continued) ∗ RAMCFG ∗ CPUCNFG ∗ X_IOR ∗ X_IOW –12V +12V ∗ ∗ SERR PERR ∗ SDONE LOCK ∗ ∗ DEVSEL ∗ ∗ IRDY TRDY ∗ ∗ FRAME STOP ∗...
  • Page 37 Connector Pin Assignments Table 2-5. Pin Assignments for Connector J5 (Continued) AD26 AD27 AD28 AD29 AD30 AD31 PCI_RESV5 PAR64 ∗ ∗ CBE4 CBE5 ∗ ∗ CBE6 CBE7 AD32 AD33 AD34 AD35 AD36 AD37 AD38 AD39 AD40 AD41 AD42 AD43 AD44 +3.3V AD45 AD46...
  • Page 38: Appendix A Related Documentation

    MVME1603/MVME1604 Single Board Computer Installation and Use* V1600-1A/IH MVME1603/MVME1604 Single Board Computer Programmer’s V1600-1A/PG Reference Guide* PM603/PM604 Processor/Memory Mezzanine Module and PM603A/UM RAM104 DRAM Memory Module User’s Manual* Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 39 Related Documentation Table A-1. Motorola Computer Group Documents Publication Document Title Number PPCBug Firmware Package User’s Manual (Parts 1 and 2)* PPCBUGA1/UM PPCBUGA2/UM PPC1Bug Diagnostics Manual PPC1DIAA/UM MVME712M Transition Module and P2 Adapter Board User’s Manual MVME712M/D MVME760 Transition Module User’s Manual...
  • Page 40: Manufacturers' Documents

    Please note that in many cases, the information is preliminary and the revision levels of the documents are subject to change without notice. To further assist your development effort, Motorola has collected some of the non-Motorola documents in this list from the suppliers. This bundle can be ordered as part number 68-PCIKIT.
  • Page 41 Table A-2. Manufacturers’ Documents (Continued) Publication Document Title and Source Number PowerPC 604 RISC Microprocessor User’s Manual MPC604UM/AD Motorola Literature and Printing Distribution Services P.O. Box 20924 Phoenix, Arizona 85036-0924 Telephone: (602) 994-6561 FAX: (602) 994-6430 IBM Microelectronics MPR604UMU-01 Mail Stop A25/862-1...
  • Page 42 Manufacturers’ Documents Table A-2. Manufacturers’ Documents (Continued) Publication Document Title and Source Number Alpine VGA Family - CL-GD543X Technical Reference Manual GD543X-TRM-003 Third Edition (part number Cirrus Logic, Inc. (or nearest Sales Office) 385439-003) 3100 West Warren Avenue Fremont, California 94538-6423 Telephone: (510) 623-8300 FAX: (510) 226-2180 DECchip 21040 Ethernet LAN Controller for PCI...
  • Page 43 Related Documentation Table A-2. Manufacturers’ Documents (Continued) Publication Document Title and Source Number M48T18 CMOS 8K x 8 TIMEKEEPER SRAM Data Sheet M48T18 SGS-Thomson Microelectronics Group Marketing Headquarters (or nearest Sales Office) 1000 East Bell Road Phoenix, Arizona 85022 Telephone: (602) 867-6100 DS1643 Nonvolatile Timekeeping RAM Data Manual DS1643/ DS1643LPM...
  • Page 44 Manufacturers’ Documents Table A-2. Manufacturers’ Documents (Continued) Publication Document Title and Source Number Z8536 CIO Counter/Timer and Parallel I/O Unit DC-8319-00 Product Specification and User’s Manual ® (in Z8000 Family of Products Data Book) Zilog, Inc. 210 East Hacienda Ave., mail stop C1-0 Campbell, California 95008-6600 Telephone: (408) 370-8016 FAX: (408) 370-8056...
  • Page 45: Related Specifications

    Related Documentation Related Specifications Table A-3 lists the product’s related specifications. The appropriate source for the listed document is also provided. Please note that in many cases, the information is preliminary and the revision levels of the documents are subject to change without notice. Table A-3.
  • Page 46 Related Specifications Table A-3. Related Specifications (Continued) Publication Document Title and Source Number IEEE - PCI Mezzanine Card Specification (PMC) P1386.1 Draft 2.0 Institute of Electrical and Electronics Engineers, Inc. Publication and Sales Department 345 East 47th Street New York, New York 10017-21633 Telephone: 1-800-678-4333 IEEE Standard for Local Area Networks: Carrier Sense Multiple Access IEEE 802.3...
  • Page 47 Related Documentation Table A-3. Related Specifications (Continued) Publication Document Title and Source Number PowerPC Reference Platform (PRP) Specification, MPR-PPC-RPU-02 Third Edition, Version 1.0, Volumes I and II International Business Machines Corporation Power Personal Systems Architecture 11400 Burnet Rd. Austin, TX 78758-3493 Document/Specification Ordering Telephone: 1-800-PowerPC Telephone: 1-800-769-3772...
  • Page 48: Appendix B Specifications

    Specifications Specifications This appendix provides general specifications for the PM603, PM604, and the RAM104. Specifications for the PM603 and PM604 are listed in Table B-1. Specifications for the RAM104 are listed in Table B-2. Table B-1. PM603/PM604 Specifications Characteristics Specifications Power requirements +3.3 Vdc (±...
  • Page 49: Table B-2. Ram104 Specifications

    144 mm (5.63 inches) Depth 133 mm (5.2 inches) Height 15.0 mm (0.59 inches) (maximum, PM603) 25.4 mm (1.0 inches) (maximum, PM604) Table B-2. RAM104 Specifications Characteristics Specifications Power requirements +5 Vdc (± 2.5%), 1.0 A typical, 1.5 A max. (DRAM Memory...
  • Page 50: Cooling Requirements

    Cooling Requirements Cooling Requirements The Motorola RAM104 DRAM Memory module is specified, designed, and tested to operate reliably when mounted on a PM603 or PM604 Processor/Memory mezzanine module (which is itself mounted on an MVME160x board) with an incoming air temperature range from 0° to 55°...
  • Page 51: Emc Compliance

    Specifications EMC Compliance The RAM104 was mounted on a PM603 or PM604, which was mounted on an MVME1603 or MVME1604 Single Board Computer, which was tested in an EMC-compliant chassis and meets the requirements for EN55022 Class B equipment. Compliance was achieved under the following conditions: Shielded cables on all external I/O ports.
  • Page 52: Glossary

    Glossary Abbreviations, Acronyms, and Terms This Glossary defines some of the abbreviations, acronyms, and key terms used in this document. See thick Ethernet. 10base-5 See thin Ethernet. 10base-2 See twisted-pair Ethernet. 10base-T Asynchronous Communications Interface Adapter ACIA Advanced Interactive eXecutive (IBM version of UNIX) The main overall design in which each individual hardware architecture component of the computer system is interrelated.
  • Page 53 Glossary Bit Boundary BLock Transfer. A type of graphics drawing BitBLT routine that moves a rectangle of data from one area of display memory to another. The data specifically need not have any particular alignment. BLock Transfer The term more commonly used to refer to a PCB (printed board circuit board).
  • Page 54 Glossary The signals of (R-Y) and (B-Y) without the luminance (-Y) signal. Color Difference (CD) The Green signals (G-Y) can be extracted by these two signals. Composite Video Signal (CVS/CVBS) Signal that carries video picture information for color, brightness and synchronizing signals for both horizontal and vertical scans. Sometimes referred to as “Baseband Video”.
  • Page 55 Glossary Erasable Programmable Read-Only Memory. A memory storage EPROM device that can be written once (per erasure cycle) and read many times. Enhanced Serial Communication Controller ESCC Electro-Static Discharge/Damage A local area network standard that uses radio frequency signals Ethernet carried by coaxial cables.
  • Page 56 (left to right) 3, 2, 1, 0, with 3 being the most significant byte. Multiplexed BLock Transfer MBLT Micro Channel Architecture MCA (bus) Motorola Computer Group GL-5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 57 Musical Instrument Digital Interface. The standard format for MIDI recording, storing, and playing digital music. Multimedia Personal Computer The PowerPC-to-PCI bus bridge chip developed by Motorola for MPC105 the Ultra 603/Ultra 604 system board. It provides the necessary interface between the MPC603/MPC604 processor and the Boot ROM (secondary cache), the DRAM (system memory array), and the PCI bus.
  • Page 58 Glossary A memory in which the data content is maintained whether the nonvolatile memory power supply is connected or not. National Television Standards Committee (USA) NTSC Non-Volatile Random Access Memory NVRAM Original Equipment Manufacturer Over - Molded Pad Array Carrier OMPAC Operating System.
  • Page 59 256-entry buffer and a 32KB unified (instruction and data) cache. It provides a 64-bit data bus and a separate 32-bit address bus. PowerPC 601 is used by Motorola, Inc. under license from IBM. The second implementation of the PowerPC family of PowerPC 603™...
  • Page 60 Glossary PowerStack™ RISC PC (System Board) A PowerPC-based computer board platform developed by the Motorola Computer Group. It supports Microsoft’s Windows NT and IBM’s AIX operating systems. See PowerPC Reference Platform (PRP). See PowerPC Reference Platform (PRP). PRP-compliant See PowerPC Reference Platform (PRP).
  • Page 61 Glossary An improvement over plain SCSI; and includes command SCSI-2 (Fast/Wide) queuing. Fast SCSI provides 10 Mbps data transfer on an 8-bit bus. Wide SCSI provides up to 40 Mbps data transfer on a 16- or 32-bit bus. A connector that can exchange data with an I/O device one bit at serial port a time.
  • Page 62 Glossary One way broadcast of digital information. The digital information Teletext is injected in the broadcast TV signal, VBI, or full field, The transmission medium could be satellite, microwave, cable, etc. The display medium is a regular TV receiver. thick Ethernet (10base-5) An Ethernet in which the physical medium is a double shielded, 50-ohm coaxial cable capable of carrying data at 10 Mbps for a length of 500 meters (also referred to as thicknet).
  • Page 63 When data is copied from disk to main memory, the physical address is changed to the virtual address. See VESA Local bus (VL bus). VL bus MCG second generation VMEbus interface ASIC (Motorola) VMEchip2 MCG ASIC that interfaces between the PCI bus and the VME2PCI VMEchip2 device.
  • Page 64 PM603/PM604 on MVME160x 1-13 control and status registers 1-9 RAM104 on PM603/PM604 1-15 cooling requirements B-3 PM603 or PM604 on MVME160x 1-14 RAM104 on PM603 or PM604 1-16 configuration register 1-9 introduction 1-1, 2-1 connector (J2) 2-2 connector (J2)pin assignments 2-2...
  • Page 65 (MCP_) 1-7 manufacturers’ documents A-3 memory maps 1-12 minimum ROMFAL & ROMNAL values 1-8 model designations 1-2 models, PM603/PM604/RAM104 3 MPC105 1-7 PCI bridge/memory controller 1-7 MPC603 processor 1-5 MPC604 processor 1-5 optional RISCWatch header (J1) 2-1...
  • Page 66 Memory Module User’s Manual 34 pages ® ™ 1/8” spine 36 - 84 pages PM603/PM604 Processor/Memory Mezzanine and RAM104 DRAM Memory User’s Manual 3/16” & 1/4” spine 86 - 100 pages ® ™ 5/16” spine 102 - 180 pages ®...
  • Page 67 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 68 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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