$/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ For Authorized Service Personnel Only: 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 Upgrade Instructions Eagle 100/200/300 to Eagle 250 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,*+7 )520 7+( 67$57 $/3+$ 0,&526<67(06 5,
© 2000 ALPHA MICROSYSTEMS FIRST EDITION: July 2000 To re-order this document, request part number PDI-00138-15. FCC Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
Table of Contents CHAPTER 1 -INTRODUCTION 1 ABOUT THIS DOCUMENT Graphic Conventions 1 2 CHAPTER 2 -COMPATIBILITY SOFTWARE COMPATIBILITY HARDWARE COMPATIBILITY SCSI TAPE AND HARD DISK DRIVE REQUIREMENTS The SCSI Floppy Drive SCSI Tape Drives SCSI Hard Disk Drives SCSI-2 Dispatcher CHAPTER 3 -UPGRADING EAGLE 250 ON-BOARD MEMORY ELECTRONIC EQUIPMENT HANDLING PRECAUTIONS INSTALLING MEMORY Setting Memory Jumpers Changing Memory SIMMs 3 3 3 3 4 4 4 4 5 5 6 7 8 CHAPTER 4 -CONFIGURING THE AM-138-10 9 AM-138
Page ii Table of Contents STEP 5 - CREATE A NEW SYSTEM INITIALIZATION FILE STEP 6 - CREATE NEW SUBSYSTEM DISK DRIVERS STEP 7 - NETWORK CONFIGURATION STEP 8 - PROTECT YOUR DATA AGAIN STEP 9 - INSTALL THE EAGLE 250 HARDWARE CHAPTER 6 -EAGLE 100 UPGRADE HARDWARE INSTALLATION PREPARING FOR THE UPGRADE REMOVING THE CHASSIS COVER REMOVING THE AM-137 BOARD PREPARING THE AM-138-10 BOARD INSTALLING THE NEW REAR PANEL AND AM-138-10 (OLD STYLE CHASSIS) INSTALLING THE NEW REAR PANEL AND AM-138-10 (NEW STYLE CHASSIS)
Table of Contents Controlling Read-Ahead WRITE BUFFERING Potential Pitfalls Setting Up Write Buffering FINAL NOTES Eagle 250 Upgrade Instructions, Rev.
LIST OF ILLUSTRATIONS Figure 3-1: ESD Wrist Strap.................................................................................................................... 5 Figure 3-2: AM-138-10 SIMM Module Installation................................................................................. 6 Figure 3-3: JP7 Memory Jumpers............................................................................................................ 7 Figure 4-1: AM-138-10 Board..............................................
Chapter 1 - Introduction The Eagle 250 is a powerful upgrade for certain Alpha Microsystems computers. Employing Motorola’s new ColdFire technology, the AM-138-10 CPU board used in the Eagle 250 gives performance never before available in an Alpha Micro entry level computer. The AM-138-10 board includes a Motorola ColdFire CPU, one or two memory SIMMs for up to 256MB of memory, 10BaseT Ethernet interface, and either a narrow or Wide SCSI bus.
Page 2 Chapter One In addition to this manual, you should have received a copy of the Eagle 250 Installation and Technical Manual, DSO-00222-00. Keep that book handy during the upgrade procedure; these instructions refer to it several times. It also includes details on the features and performance of the AM-138-10 board and Eagle 250, and environmental and electrical requirements.
Chapter 2 - Compatibility Before you proceed with your upgrade, it’s important to make sure you have all the hardware and software you’ll need. This chapter discusses the hardware and software compatibility issues that may arise during your Eagle 250 installation. SOFTWARE COMPATIBILITY To be compatible with the AM-138-10 CPU board, the operating system must be AMOS 2.3A, PR 06/00 or later. You cannot use AMOS 1.x with the AM-138-10.
Page 4 Chapter Two The SCSI Floppy Drive Most previous Alpha Micro computers, including the Eagle you’re upgrading from, used a separate floppy disk controller to interface to a diskette drive. The Eagle 250 does not support any of the floppy controllers used in previous Alpha Micro systems (the AM-210, 212, 214, or 219). Instead, it can use a SCSI floppy drive, the AM-212-20. The AM-212-20 attaches to the SCSI cable like any other SCSI device. Though it is a 3.5” diskette drive, it uses a 5.
Chapter 3 - Upgrading Eagle 250 On-Board Memory The AM-138-10 has two on-board SIMM (single inline memory module) expansion slots, which support 60ns DRAMs. Because the memory is located on-board, it can be accessed much faster than memory accessed over the VME bus—i.e., AM-730 and AM-740 memory boards used with earlier CPU boards. The following procedures describe how to install and remove the memory SIMMs, and set the memory size jumpers.
Page 6 Chapter Three INSTALLING MEMORY The Eagle 250 supports from 4MB to 256MB of main memory: either one or two memory SIMMs of 4MB, 8MB, 16MB, 32MB, 64MB, or 128MB. Use 60ns SIMMs only; 70ns SIMMs will not work. Unlike the AM-6000 and AM-7000, SIMMs do not have to be installed in pairs: you can use either one or two SIMMs; if you use two, they do not have to be of equal size. For example, you can install one 32MB SIMM and one 16MB SIMM for a total of 48MB of memory.
Upgrading Eagle 250 On-board Memory Page 7 2. Insert the SIMM module into the connector at a slight angle. Rotate into the upright position. The SIMM will engage the metal retainer clips and click into position, locking the SIMM in place. 3. If you are using two SIMMs, repeat steps 1 and 2 for the second one, at connector J11. Setting Memory Jumpers 1 2 4 1 2 4 BANK1 BANK0 JP7 After installing the SIMMs, set the jumpers at location JP7 on the AM-138-10 board according to the table below.
Page 8 Chapter Three Memory Module Size Combinations: 4MB 2 x 4MB 8 MB 8MB + 4MB 2 x 8MB 16MB 16MB + 4MB 16MB + 8MB 2 x 16MB 32MB 32MB + 4MB 32MB + 8MB 32MB + 16MB 2 x 32MB 64MB 64MB + 4MB 64MB + 8MB 64MB + 16MB 64MB + 32MB 2 x 64MB 128MB 128MB + 4MB 128MB + 8MB 128MB + 16MB 128MB + 32MB 128MB + 64MB 2 x 128MB Total Memory 4MB 8MB 8 MB 12MB 16MB 16MB 20MB 24MB 32MB 32MB 36MB 40MB 48MB 64MB 64MB 68MB 72MB 80MB 96MB 128MB 128MB 132MB 136MB 144MB 160MB 192MB 256MB Bank0 Settings 1 2 4 X X X X X X O X X O X
Chapter 4 - Configuring the AM-138-10 This chapter contains information you may need both before and after installing your Eagle 250. It covers: • Jumpers and connectors on the AM-138-10 board • CMOS setup • Ethernet interface • Remote reset capability • Installing the SSD chip • On-board serial ports • Front panel status display codes • UPS monitoring information We recommend that you safeguard your computer components by insuring that your work area is properly protected against static discharge.
Page 10 Chapter Four Remote reset jumper On-board serial ports SSD goes here Wide SCSI connector Narrow SCSI connector Serial I/O expansion slots Memory Remote reset adapter attaches here. First memory SIMM Second memory SIMM Figure 4-1: AM-138-10 Board Eagle 250 Upgrade Instructions, Rev.
Configuring the AM-138-10 Page 11 AM-138-10 Jumpers Jumper Number JP1 Jumper Name RR-EN Default Setting out JP2 Level7 Select UPS JP3 20 16 TERMPWR IN out EN DISC Memory Size Select 32 16 25 20 33 33 50 66 SP IN See Table 3-2 JP5 JP6 JP7 JP8 JP9 out out out out IN out out IN out Notes When IN, enables remote reset through serial port 0 (this is not supported through AM-90 card); when out, allows remote reset cable attachment at P8. See page 13. 3-pin jumper; set to two pins at UPS side.
Page 12 Chapter Four AM-138-10 Connectors The following table provides a brief overview of the connectors on the AM-138-10 board.
Configuring the AM-138-10 Page 13 • Monitor file name: AMOS32.MON • Initialization file name: AMOS32.INI • Network interface: TPI • Serial port 0 speed: 19.2K baud • Boot messages on console?: Yes For information on changing the CMOS configuration , please refer to Chapter 4 of the Eagle 250 Installation and Technical Manual. ETHERNET PORT The AM-138-10 board contains a 10BaseT Ethernet connector.
Page 14 Chapter Four INSTALLING THE SSD CHIP You must remove the SSD chip from your existing computer and install it in on the AM-138-10. Removing the SSD requires a special tool. See the illustration below for more information. WARNING! The SSD chip and boot PROM on the AM-138 board require a specialized tool for their removal. If you attempt to remove the SSD chip or boot PROM using a screwdriver or pocketknife, you could easily damage both the chip and the socket.
Configuring the AM-138-10 Page 15 FRONT PANEL STATUS DISPLAY CODES Your computer includes a two-digit front-panel status display, which can show various codes indicating the state of the system. Some of these codes will occur only while the computer is booting; others may occur any time the computer is running.
Chapter 5 - Beginning an Eagle 250 Upgrade When you upgrade your computer to an Eagle 250, it’s important that you perform the proper hardware and software steps in the correct order, taking all the necessary precautions to protect your data in case of a problem. Here is a brief summary of the steps you must follow to complete your upgrade: 1. Safeguard your data by performing a complete backup and preparing and testing a warm boot tape. 2.
Page 18 Chapter Five STEP 1 - PROTECTING YOUR DATA Perform a Complete Back Up When doing a major upgrade to a computer, you want to be absolutely sure you have a recent and complete system backup. Although it is very unlikely that data stored on your hard disk drive would be corrupted when upgrading your computer, you should be prepared for anything. Before you loosen the first screw or download any new software, make sure all your data is copied onto some form of backup media.
Beginning an Eagle 250 Upgrade Page 19 STEP 4 - CREATE A NEW SYSTEM MONITOR Because of the Eagle 250’s CMOS configuration, you can give the system monitor file any name you want. So, you can create a monitor to use after the AM-138-10 board is installed without affecting the way your system performs now. Use MONGEN to create a monitor called AM138.MON, containing the SCZ138 disk driver. For example: LOG SYS: ENTER MONGEN ENTER Input monitor name: AMOS.MON ENTER New disk driver: SCZ138.
Page 20 Chapter Five New Queue Block Requirement = 200 + (13 x 50) This example results in a setting of 850 queue blocks. However, we strongly recommend that you use a minimum a 2,500 queue blocks, even if the formula results in a lower number. 5. Since you will be booting from a SCSI disk drive connected to the AM-138-10 board, you need to define the SCSI dispatcher for the Eagle 250 (described in Chapter 3) in the system initialization command file.
Beginning an Eagle 250 Upgrade Page 21 Use /EW without a device ID (to enable Wide operation for the entire bus) only if all devices on the bus, both disk and tape drives, are Wide SCSI devices. Do not use the /EW switch with the narrow SCSI bus, even if you have Wide SCSI devices attached to the bus using the appropriate adapters. 6. Add or modify the DEVTBL statement for the parallel printer port: DEVTBL /EGP0 To load EGP.
Page 22 Chapter Five STEP 7 - NETWORK CONFIGURATION In step 5, you changed a SYSTEM statement in the AM138.INI file to load the correct network interface driver for the Eagle 250 Ethernet port you will be using. You must make the same change to the AlphaTCP configuration file, CONFIG. To do this: 1. Log to TCP:. 2. Edit the CONFIG. File. 3. Change the IFCONFIG statement to AM138.LDV. 4. Save the file. If the Eagle 250 won’t be using AlphaTCP, you can skip this step.
Chapter 6 - Eagle 100 Upgrade Hardware Installation In this upgrade the AM-138-10 replaces the AM-137 CPU board. This upgrade procedure involves removing the old CPU and rear panel and installing the AM-138-10 and a new rear panel. The following instructions walk you through this process. PREPARING FOR THE UPGRADE Before starting the hardware upgrade, make sure you have completed all of the steps in Chapter 5, "Beginning an Eagle 250 Upgrade.
Page 24 Chapter Six Figure 6-1: Deskside Chassis Cover Removal REMOVING THE AM-137 BOARD 1. Label all cables between the AM-137 and the rear panel, then unplug them from both the rear panel and the AM-137. 2. Remove the two male-female standoffs on either side of the parallel port connector which attach the AM-137 to the back panel. 3. Unplug and label all cables still attached to the AM-137.
Eagle 100 Upgrade: Hardware Installation Page 25 1 POWER SUPPLY 2 3 4 5 MAIN ELECTRONICS BOARD MOUNTING BRACKET 6 To remove the board mounting assembly, you must remove these two screws. Figure 6-2: AM-137 Mounting Bracket Removal 5. Carefully lift the mounting plate up and forward, toward the front of the chassis, then out. The mounting plate helps to stabilize the chassis. With it removed, you will be able to rock the chassis back and forth slightly. This is normal. 6.
Page 26 Chapter Six PREPARING THE AM-138-10 BOARD 1. Use eight of the mounting screws you just removed to attach the AM-138-10 to the mounting plate. 2. If you haven’t yet, check the jumpers on the AM-138-10 board to make sure they are set correctly. Refer to the table in Chapter 4. 3. Install one or two memory SIMMs at J10 (and J11), following the instructions in Chapter 3. 4.
Eagle 100 Upgrade: Hardware Installation Page 27 110 REMOVE THE TWO SCREWS HOLDING THE SCSI CONNECTOR TO THE REAR PANEL MAIN ALT BOOT H1 SCSI H2 ETHERNET PARALLEL 0 PARALLEL 1 G1 G2 F1 F2 E1 E2 D1 D2 C1 C2 B1 B2 A1 A2 REMOVE THESE FIVE REAR PANEL SCREWS Figure 6-3: Removing the Old Rear Panel Eagle 250 Upgrade Instructions, Rev.
Page 28 Chapter Six INSTALLING THE NEW REAR PANEL AND AM-138-10 (NEW STYLE CHASSIS) If you have the old style chassis, you should have already performed this function in the previous section. Skip ahead to the next section. You will be removing the entire rear panel assembly in this section and replacing it with the new panel contained in your upgrade kit. 1. Carefully position the computer chassis on its side to facilitate the rear panel removal. 2.
Eagle 100 Upgrade: Hardware Installation Page 29 HOOKING UP THE AM-138-10 1. Attach two 6-pin cables from the power supply at P3 and P4 on the AM-138-10. 2. Attach the SCSI cable to the AM-138-10: • If you’re using the narrow SCSI bus, plug the existing SCSI cable into P7. Install the active SCSI terminator supplied in your upgrade kit into the SCSI external connector at the rear panel. See Appendix A for further SCSI terminator details.
Page 30 Chapter Six 115 EXTERNAL SCSI PORT 10-BaseT ETHERNET PORT INSTALL COVER PLATE HERE SERIAL I/O EXPANSION SLOTS 25-PIN PARALLEL PORT 8 STANDARD SERIAL PORTS 9-PIN UPS STATUS PORT BOOT PORT OPTIONAL AM-90 BOARDS Figure 6-4: Eagle 250 Rear Panel (Old Style Chassis) Eagle 250 Upgrade Instructions, Rev.
Eagle 100 Upgrade: Hardware Installation Page 31 0 SCSI 115 EXTERNAL SCSI PORT 10-BaseT ETHERNET PORT 25-PIN PARALLEL PORT 9-PIN UPS STATUS PORT 6 7 4 5 2 3 0 1 SERIAL I/O EXPANSION SLOTS FOR RJ-45 CONNECTORS 8 STANDARD DB9 SERIAL PORTS (RJ-45 CONFIGURATION OPTIONALLY AVAILABLE) BOOT PORT OPTIONAL AM-90 BOARDS Figure 6-5: Eagle 250 Rear Panel (New Style Chassis) Eagle 250 Upgrade Instructions, Rev.
Page 32 Chapter Six 8. Attach the front panel display cable. If it’s a 26-pin connector, use P9; a 20-pin connector plugs in at P10. If you use the 20-pin connector, you should also have four wire pairs which were connected to the front panel from the AM-137. Attach these to the P8 connector on the AM-138-10, as follows: Board Label Run Wires Yellow/White Disk Red/White Power Reset Green/White Green/Black Purpose/Notes Run light; white wire goes toward edge of board.
Chapter 7 - Eagle 200/300 Upgrade Hardware Installation In this upgrade the AM-138-10 replaces the AM-172 Roadrunner board and the AM-319 system board. This upgrade procedure involves removing these two boards and the rear panel and installing the AM138-10 and a new rear panel. The following instructions walk you through this process. PREPARING FOR THE UPGRADE Before starting the hardware upgrade, make sure you have completed all of the steps in Chapter 5, "Beginning an Eagle 250 Upgrade.
Page 34 Chapter Seven Figure 7-1: Deskside Chassis Cover Removal REMOVING THE ROADRUNNER BOARD Where your Roadrunner board is located in your chassis depends on when you purchased your computer. On early-model Eagle computers, the Roadrunner board is mounted vertically on a special bracket. Later model Eagle computers have their Roadrunner boards mounted horizontally on the chassis bottom.
Eagle 300/500 Upgrade: Hardware Installation Page 35 DW F-2 0 DW or754-0 0 F-2 075 4-0 1 The Roadrunner board is mounted on the DWF-20754-00 bracket shown.To remove the board, remove these four Phillips-head screws. You can then fold down the mounting bracket and board assembly onto your work surface to unplug the cables. Figure 7-2: Roadrunner Mounting Bracket, Early-Model Eagles 2. Fold the Roadrunner board and mounting bracket down onto your work surface, as shown in Figure 7-3.
Page 36 Chapter Seven ROADRUNNER 030 BOARD Before removing the Roadrunner board, unplug the two cables from the X-Bus connectors, the SCSI cable, and the 4-pin power cable. Then, remove the entire Roadrunner board/mounting bracket assembly. Figure 7-3: Roadrunner Removal, Early-Model Eagles 3. Unplug all cables from the Roadrunner board, including the SCSI cable, power cable, X-bus cables, etc. 4. Lift out the entire Roadrunner/bracket assembly. Eagle 250 Upgrade Instructions, Rev.
Eagle 300/500 Upgrade: Hardware Installation Page 37 Removing a Horizontally-mounted Roadrunner The Roadrunner is attached to a screen on the bottom of the chassis using four male/female standoffs and four 6-32 Phillips-head screws. To remove it: 1. Unplug all cables from the Roadrunner board, including the SCSI cable, power cable, X-bus cables, etc. 2. Unscrew the four Phillips-head screws holding the Roadrunner to the standoffs and lift the board out. 3.
Page 38 Chapter Seven REMOVING THE AM-319 BOARD 1. Label all cables between the AM-319 and the rear panel, then unplug them from both the rear panel and the AM-319. 2. Remove the two male-female standoffs attaching the AM-319 to the back panel. 3. Unplug all cables still attached to the AM-319 (the X-bus cables, power cables, SCSI cable, and front panel display cable). Label the power and display cables, as they’ll be used in the Eagle 250.
Eagle 300/500 Upgrade: Hardware Installation Page 39 The mounting plate helps to stabilize the chassis. With it removed, You will be able to rock the chassis back and forth slightly. This is normal. 6. Remove the AM-319 from the mounting plate by unscrewing the nine screws holding it in place. 7. If the computer contains an AM-219 floppy controller, remove it and the diskette drive. Only SCSI diskette drives are supported with the Eagle 250. PREPARING THE AM-138-10 BOARD 1.
Page 40 Chapter Seven 110 REMOVE THE TWO SCREWS HOLDING THE SCSI CONNECTOR TO THE REAR PANEL MAIN ALT BOOT H1 SCSI H2 ETHERNET PARALLEL 0 PARALLEL 1 G1 G2 F1 F2 E1 E2 D1 D2 C1 C2 B1 B2 A1 A2 REMOVE THESE FIVE REAR PANEL SCREWS Figure 7-6: Removing the Old Rear Panel Eagle 250 Upgrade Instructions, Rev.
Eagle 300/500 Upgrade: Hardware Installation Page 41 5. Reinstall the CPU mounting plate, which now has the AM-138-10 attached. First slide the connector end of the AM-138-10 into place in the rear panel. Then, move the other end into the proper orientation and press down over the small locating bumps in the chassis bottom. You may have to rock the chassis top slightly forward or back to lock the locating bumps in place, with the mounting plate flush against the chassis bottom.
Page 42 Chapter Seven 9. Re-attach the fan to the new rear panel using the four screws and nuts removed in step 3 above. Make sure it is oriented to exhaust air out of the chassis, in the same orientation it was previously installed. 10. Reinstall the rear panel connectors, removed in step 3, to the new rear panel. Figure 6-5 shows the position of the standard I/O connectors. 11. Reinstall the CPU mounting plate, which now has the AM-138-10 and rear sub-panel attached.
Eagle 300/500 Upgrade: Hardware Installation Page 43 AM-314 in any slot for compatibility with your previous configuration. See Chapter 3 of the Eagle 250 Installation and Technical Manual for more serial I/O configuration information. 5. If you purchased the optional AM-90 Lightning boards for the eight on-board serial I/O ports, install them into each of the two bottom rear panel I/O slots (see Figure 7-7).
Page 44 Chapter Seven 115 EXTERNAL SCSI PORT 10-BaseT ETHERNET PORT INSTALL COVER PLATE HERE SERIAL I/O EXPANSION SLOTS 25-PIN PARALLEL PORT 8 STANDARD SERIAL PORTS 9-PIN UPS STATUS PORT BOOT PORT OPTIONAL AM-90 BOARDS Figure 7-7: Eagle 250 Rear Panel (Old Style Chassis) Eagle 250 Upgrade Instructions, Rev.
Eagle 300/500 Upgrade: Hardware Installation Page 45 0 SCSI 115 EXTERNAL SCSI PORT 10-BaseT ETHERNET PORT 25-PIN PARALLEL PORT 9-PIN UPS STATUS PORT 6 7 4 5 2 3 0 1 SERIAL I/O EXPANSION SLOTS FOR RJ-45 CONNECTORS 8 STANDARD DB9 SERIAL PORTS (RJ-45 CONFIGURATION OPTIONALLY AVAILABLE) BOOT PORT OPTIONAL AM-90 BOARDS Figure 7-8: Eagle 250 Rear Panel (New Style Chassis) Eagle 250 Upgrade Instructions, Rev.
Page 46 Chapter Seven FINISHING UP The hardware portion of the upgrade is complete. Continue with Chapter 8 to test and boot the new Eagle 250. Perform these procedures before attaching the computer's cover, in case you need to make some adjustments. Once your system completes the testing procedures successfully, shut it off again and reattach the top cover. Eagle 250 Upgrade Instructions, Rev.
Chapter 8 - Testing the New System After you’ve installed the new hardware, you need to test the system to make sure it works properly in its new configuration. To do so: 1. Run self-test. 2. If the system passes the self-test, access the CMOS Configuration menu to define your configuration, then boot the computer. Make sure it boots correctly with your new configuration. 3. Rename your new system monitor and initialization files. 4. Back up the entire system and make a new warm boot tape.
Page 48 Chapter Six RENAMING THE SYSTEM MONITOR AND INITIALIZATION FILES Once the system has passed the self-test and you have made sure that all jobs are up and running: 1. Make archive copies of your previous monitor and initialization files. For example: LOG SYS: ENTER COPY OLDMON.MON=AMOS32.MON COPY OLDINI.INI=AMOS32.INI ENTER ENTER 2. Rename the AM138.MON and AM138.INI files to AMOS32.MON and AMOS32.INI: COPY AMOS32.MON=AM138.MON COPY AMOS32.INI=AM138.INI ENTER ENTER 3.
Appendix A - SCSI Termination SCSI TERMINATION USING EXTERNAL TERMINATOR The preferred method of terminating the SCSI bus in an AMOS based computer is the installation of an external terminator. In April 1993, the external SCSI bus terminator became standard on all AMOS computers. Using an external terminator makes installing an add-on subsystem (like a portable CD-ROM drive) easier, eliminating the need to remove terminators from a SCSI device located in the host computer.
Page 50 Appendix A Figure A-1 shows an extended active external narrow SCSI connector and bail locks for holding the terminator in place. The terminator is installed by sliding it over the connector and then latching the bail locks into the notches in the terminator. ATTACHING EXTERNAL DEVICES To attach an external SCSI device, you must remove the terminator from the external SCSI port. However, you must make sure the SCSI bus is still terminated at both ends.
Appendix B - Read-ahead and Write Buffering The AM-138-10 board uses a programmable RISC DMA controller for SCSI bus communications and for data transfer to and from the AM-138-10's SCSI bus. The ColdFire CPU is only involved with setup before and cleanup after a SCSI command is sent to a devicethe rest of the command, including data transfer, is handled by the RISC processor.
Page 52 Appendix B FIXLOG ENTER FIXLOG.LIT Version x.x(xxx) 1. Change the number of logicals. 2. Create a sub-system driver. Enter choice: 2 ENTER Enter name of generic driver to be used: SCZ138 ENTER Enter number of logical units per physical unit: 10 Enter SCSI id (0-15): 0 ENTER Enter number of read-ahead blocks (0-7): 5 ENTER Enter new driver name: DSK ENTER New driver is now in memory. ENTER To save the driver you have created, type: SAVE DSK.
Read-ahead and Write Buffering Page 53 Potential Pitfalls Obviously, there can be problems with write buffering, especially if the system either crashes or is powered off while writes are pending in the write buffer. If that happens, all pending writes are lost. Though this sounds like a major problem, it can also happen if write buffering is not enabled. However, write buffering increases the number of writes at risk.
Page 54 Appendix B When specifying write buffering for a device, two files are placed into system memory: .DVR (loaded from disk) and .WRC (directly created in system memory), which are the driver and cache buffer. This is true for all SCSI disk devices except the DSK device. For the DSK device, the file DSK.DVR does not need to be created because it is already loaded into the system monitor. Therefore, for the DSK device, only the file DSK.WRC will be created in system memory.
