Specifications

Introduction
FUNCTIONAL BLOCKS
Figure 1-1 illustrates the functional blocks of the ZT 8832. A
description of each block follows.
V40 (µPD70208) Pr
ocessor
The NEC V40 is a highly integrated microprocessor that includes an
8088 compatible CPU and many standard I/O devices. The 8088
compatible CPU executes all code written for the 8088/8086 family of
microprocessors. In addition, the V40 instruction set includes
expanded rotate and shift, bit and nibble manipulation, and string I/O.
The standard I/O devices found in the V40 include an interrupt
controller (8259 architecture), counter/timers (8284 architecture), a
serial controller (8251 architecture), and a DMA controller. The V40
is fabricated with CMOS technology to provide an increase in both
temperature range and noise immunity with a reduction in power
consumption.
Local
Memory
The ZT 8832 is populated with three 32-pin memory sockets dedi-
cated for use by the V40 microprocessor. One socket supports 8K,
16K, 32K, 64K, 128K, and 512 Kbyte EPROMs. The remaining two
sockets each support 32 Kbyte and 128 Kbyte RAMs, with optional
battery backup. Additionally, one of the RAM sockets can be
configured to support a 512 Kbyte RAM. This memory is not
accessible by the STD bus CPU.
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