Specifications

Chapter 7
NUMERIC DATA PROCESSOR (8087)
Contents Page
OVERVIEW ..................................................... 7-1
ZSBC 337 PIGGYBACK PROCESSOR
............................ 7-3
INSTALLING THE ZSBC 337
.................................... 7-4
COPROCESSOR INTERFACE
.................................... 7-7
MEMORY ADDRESSING
........................................ 7-8
INTERRUPT/NUMERIC ERRORS
................................ 7-9
REFERENCES
................................................. 7-13
OVERVIEW
Technological advances in large-scale integrated circuits now permit a
complete floating point mathematics subsystem to reside on a single
silicon substrate. The 8087 Numeric Data Processor (NDP) is
designed to function as a tightly coupled coprocessor in conjunction
with the 8088 series microprocessor. The ZT 8808A and ZT 8809A
each feature a V20 microprocessor that operates in MAX mode,
which also allows the addition of the 8087. The 8 MHz ZT 8809A
requires the use of the faster 8087-2. This option, when installed on
the CPU, rivals mainframe machines in terms of mathematical
capabilities.
7-1