file control block การใช้

• They contain things like the thread state save areas, file control blocks, and accounting information.
• It used the CP / M-derived file control blocks for disk access and did not support subdirectories.
• The current size of a file was maintained in the file's file control block ( FCB ) by the operating system.
• A control block called the JFCB ( Job File Control Block ) initially holds the information extracted from the DD statement for the dataset.
• The hidden parameter permits, for example, a file I / O gate to contain the address or handle of the file control block.
• File systems keep track of the times that files are created, modified, and / or accessed by storing timestamps in the file control block ( or inode ) of each directory.
• Microsoft partially removed support for File Control Blocks ( an API hold-over of DOS 1 . x and CP / M ) in Windows 95 OSR2 ( OEM Service Release 2 ).
• A new 9-sector format bumped the capacity of floppy disks to 360 kB . The Unix-inspired kernel featured file handles in place of the CP / M-derivative file control blocks and loadable device drivers could now be used for adding hardware beyond what the IBM PC BIOS supported.
• The code of the requested SVC was loaded into the Z-80 accumulator, any required parameters were loaded into their specified Z-80 general purpose registers ( or needed regions of RAM set up as required, such as File Control Blocks ), and a Z-80 restart instruction was issued ( RST 40 ).