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SECTION 9
APPLICATION COMMAND INTERFACE PROGRAMMING GUIDE
2-17
2.4 The WRITE Command
The WRITE command initiates a data exchange between a device and the application. The data is
transferred from the application to a device. If any data have to be written to a block oriented device then
blocks of data are transferred; in case of a character oriented device only bytes can be transmitted to the
device. The number of blocks or bytes to be written have to be specified too. The Command Control
Buffer to issue a WRITE command is structured as described below.
typedef struct _ccb_write_command
{
unsigned long _access_control_flags;
long ( *ME_system_call ) ( );
CCB *ccb_link;
long last_command;
unsigned long _reserved[ 7 ];
long command;
unsigned char *buffer;
unsigned long count;
unsigned long block_number;
unsigned long write_mode;
unsigned long _remnant[ 48 ];
} CCB_WRITE_COMMAND;
_access_control_flags:
The BUSY semaphore has to be set to indicate the readiness of the Command Control Buffer to
be processed; all other semaphores within the Access Control Field have to be left unaffected.
command:
The value $08 indicates that the command control buffer is used to issue the WRITE command
through the Application Command Interface.
*buffer:
Addresses the buffer which contains the data to be written to the device.
count:
Specifies either the number of blocks to be written to a block oriented device or specifies the
number of bytes to be written to a character oriented device.
Содержание SYS68K/CPU-40
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Страница 8: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 1 2 Figure 1 1 Photo of the CPU Board...
Страница 9: ...SECTION 1 INTRODUCTION 1 3 Figure 1 2 Block Diagram of the CPU Board...
Страница 33: ...SYS68K CPU 40 41 USER S MANUAL FORCE COMPUTERS 2 20 Figure 2 1 Location Diagram for All Jumperfields...
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 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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