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SYS68K/CPU-40/41 USER'S MANUAL
FORCE COMPUTERS
1-4
1.1 The Logical Devices
The devices on available EAGLE modules cannot be accessed from the VMEbus directly, but the
Application Command Interface provides a method to access devices on a "higher logical" level. Each
device accessible through the Application Command Interface is identified by an unique "logical device
number" that has been assigned to the device by the Application Command Interface. Such a logical device
number consists of a major device number and a minor device number. The major device number packs
up a number of devices with the same characteristics, and the minor device number identifies each device
in such a group of devices packed up under the major device number.
In general, devices are divided into two classes: the first class represents devices which can be shared
among a number of applications (SHARABLE devices), which means that multiple applications can access
the device simultaneously (e.g. SCSI Controller, FD Controller, Ethernet Controller, etc.). Logical
connections to a SHARABLE device can be established by multiple applications simultaneously. The
second class contains devices which cannot be shared among applications (NON_SHARABLE devices),
and only one application can establish a logical connection to such a device.
The device classes can be distinguished by the minor device number assigned to the corresponding
device: a minor device number in the range 0 to 31 identifies a NON-SHARABLE device (which means up
to 32 devices are packed up under one single major device number); and the minor device number -1
specifies a SHARABLE device.
Furthermore, devices in the classes are divided into groups of devices with the same characteristics
(device type): devices which allow communication via a serial communication line (e.g. ethernet, FDDI,
RS-232, etc.), devices which communicate via a parallel "bus" (e.g. ordinary parallel I/O peripheral,
IEEE-488 Controller, etc.), devices which are attached to mass storage devices (e.g. SCSI Controller, FD
Controller, etc.). Thus the Application Command Interface offers accesses to generic SERIAL-, PARALLEL-
, and MASS STORAGE devices.
To establish a logical connection to a device the application has to issue the OPEN command through the
Application Command Interface with the appropriate logical device number of the device the application
wants to communicate with. The Application Command Interface returns a Command Control Buffer
associated with the particular device to the application and the application has to use this Command
Control Buffer to issue subsequent commands to the "device".
Содержание SYS68K/CPU-40
Страница 2: ...INTRODUCTION...
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Страница 9: ...SECTION 1 INTRODUCTION 1 3 Figure 1 2 Block Diagram of the CPU Board...
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Страница 34: ...SECTION 1 INTRODUCTION 2 21 Figure 2 2 The Front Panel of the CPU Board...
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Страница 42: ...INSTALLATION...
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Страница 57: ...HARDWARE USER S MANUAL...
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Страница 70: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 2 4 Figure 2 2 Location Diagram of Jumperfields B17...
Страница 83: ...SECTION 3 HARDWARE USER S MANUAL 3 13 Figure 3 2 Location Diagram of the System EPROM Area...
Страница 92: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 3 22 3 5 6 Location Diagram of Jumperfield B16...
Страница 95: ...SECTION 3 HARDWARE USER S MANUAL 3 25 Figure 3 5 Location Diagram of the Backup Supply Jumperfield B1 and B20...
Страница 98: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 3 28 Figure 3 6 Location Diagram of the Boot EPROM...
Страница 104: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 3 34 Figure 3 7 Location Diagram of the 0S S Resistors R563 to R569...
Страница 107: ...SECTION 3 HARDWARE USER S MANUAL 3 37 Figure 3 11 Location Diagram of RS232 Configuration Jumperfields B3 B4 B5 and B6...
Страница 110: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 3 40 Figure 3 12 Location Diagram of the 0S S Resistors R563 to R569...
Страница 133: ...SECTION 3 HARDWARE USER S MANUAL 3 63 Figure 3 24 CPU Board Front Panel and Rotary Switch Positions...
Страница 141: ...SECTION 3 HARDWARE USER S MANUAL 3 71 Figure 3 25 Location Diagram of Header B12...
Страница 152: ...SECTION 3 HARDWARE USER S MANUAL 4 3 Figure 4 1 Front Panel of the CPU Board...
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Страница 172: ...SECTION 3 HARDWARE USER S MANUAL 6 17 Figure 6 2 Location Diagram of Jumperfield B19...
Страница 179: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 6 24 Figure 6 4 Location Diagram of B13...
Страница 181: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 6 26 Figure 6 6 Location Diagram of Jumperfield B13...
Страница 183: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 6 28 Figure 6 8 Location Diagram of Jumperfield B2...
Страница 185: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 6 30 Figure 6 9 Location Diagram of Jumperfield B13...
Страница 187: ...APPENDIX TO THE HARDWARE USER S MANUAL...
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Страница 205: ...SECTION 4 APPENDIX TO THE HARDWARE USER S MANUAL E 1 APPENDIX E CIRCUIT SCHEMATICS OF CPU BOARD...
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Страница 207: ...SECTION 4 APPENDIX TO THE HARDWARE USER S MANUAL E 3 E 1 Circuit Schematics of DRM 01...
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Страница 209: ...SECTION 4 APPENDIX TO THE HARDWARE USER S MANUAL E 5 E 2 Circuit Schematics of SRM 01...
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Страница 213: ...SECTION 4 APPENDIX TO THE HARDWARE USER S MANUAL F 3 Location Diagram for All Jumperfields...
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Страница 228: ...COPIES OF DATA SHEETS...
Страница 229: ...COPIES OF DATA SHEETS RTC 72423 DUSCC 68562 PI T 68230...
Страница 230: ...USERS NOTES...
Страница 231: ...USERS NOTES...
Страница 232: ...USERS NOTES...
Страница 233: ...OPTIONS APPLICATIONS MODIFICATIONS...
Страница 234: ...INTRODUCTION TO VMEPROM IN USE WITH THE SYS68K CPU 40 41...
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Страница 268: ...APPENDIX TO THE INTRODUCTION TO VMEPROM...
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Страница 319: ...THE APPLICATION COMMAND INTERFACE PROGRAMMING GUIDE...
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