System information

BIOS and interpreted by the BIOS I/O entry points CONST, CONIN, CONOUT, LIST, PUNCH,
and READER. Depending on the setting of the IOBYTE, different I/O drivers can be selected by
the BIOS. For example, setting LST:=TTY: might cause LIST output to be directed to a serial
port, while setting LST:=LPT: causes LIST output to be directed to a parallel port.
K: Abbreviation for kilobyte. See kilobyte.
keyword: See command keyword.
kilobyte (K): 1024 bytes or 0400H bytes of memory. This is a standard unit of memory. For
example, the Intel 8080 supports up to 64K of memory address space or 65,536 bytes. 1024
kilobytes equal one megabyte, or over one million bytes.
linker: Utility program used to combine relocatable object modules into an absolute file ready
for execution. For example, LINK-80(TM) creates either a COM or PRL file from relocatable
REL files, such as those produced by PL/1-80(TM).
LIST: A BIOS entry point to a routine that sends a character to the list device, usually a printer.
list device: Device such as a printer onto which data can be listed or printed.
LISTST: BIOS entry point to a routine that returns the ready status of the list device.
loader: Utility program that brings an absolute program image into memory ready for execution
under the operating system, or a utility used to make such an image. For example, LOAD
prepares an absolute COM file from the assembler hex file output that is ready to be executed
under CP/M.
logged in: Made known to the operating system, in reference to drives. A drive is logged in when
it is selected by the user or an executing process. It remains selected or logged in until you
change disks in a floppy disk drive or enter CTRL-C at the command level, or until a BDOS
Function 0 is executed.
logical: Representation of something that might or might not be the same in its actual physical
form. For example, a hard disk can occupy one physical drive, yet you can divide the available
storage on it to appear to the user as if it were in several different drives. These apparent drives
are the logical drives.
logical sector: See sector.
logical-to-physical sector translation table: See XLT.
LSC: Diskdef macro library parameter specifying the last physical sector number.
Appendix H : Glossary CP/M Operating System Manual
H-12