ZiLOG System 8000 User Manual

USER
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Zilog
USER
segmented address
In Z800l CPU's, a 23-bit value consist-
ing of a 7-bit segment number and a 16-
bit offset.
segmented mode One of the Running-state modes of the
Z800l CPU. In this mode, the CPU gen-
erates addresses that can have different
segment numbers.
shell A shell is a command language inter-
preter. It is possible for users to
write and run their own shells, as
shells are no different from any other
program in terms of system response.
stack A data structure used for temporary
storage or for procedure and interrupt
serVlce routine linkages. A stack uses.
the last-in, first-out concept. As
items are added to, or pushed onto, the
stack, the stack pointer decrements; as
items are removed from, or popped off,
the stack, the stack pointer increments.
stack pointer A general-purpose register indicating
the top (lowest address) of a stack.
status A command normally returns a status when
it finishes. By convention, a status of
zero indicates that the command suc-
ceeded. Commands can return non-zero
status to indicate that some abnormal
event has occurred.
status flags Status flags are set according to the
outcome of . certain instructions to
direct the subsequent flow of the pro-
gram as necessary. There are six status
flags: Carry, Zero, Sign,
Parity/Overflow, Decimal Adjust and Half
Carry. The first four are grouped
together to determine the condition
code, the last two are used in programs
manipulating ~ digits.
Zilog
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ZiLOG System 8000 Specifications

General

Brand	ZiLOG
Model	System 8000
Category	Desktop
Language	English