Specifications

Chapter 5
PROCESSOR DESCRIPTION (V40)
Contents Page
OVERVIEW ..................................................... 5-2
ZT 8832 SPECIFICS
............................................. 5-2
COMMONLY ASKED QUESTIONS
.............................. 5-3
FUNCTIONAL BLOCKS
......................................... 5-5
CPU - Central Processing Unit
................................. 5-6
BIU - Bus Interface Unit
..................................... 5-19
BAU - Bus Arbitration Unit
.................................. 5-19
CGU - Clock Generator Unit
................................. 5-20
VCR - V40 Configuration Registers
........................... 5-20
WCU - Wait Control Unit
.................................... 5-21
SCU - Serial Control Unit
.................................... 5-21
TCU - Counter/Timer Control Unit
............................ 5-21
ICU - Interrupt Control Unit
.................................. 5-22
DCU - DMA Control Unit
.................................... 5-22
RESET
......................................................... 5-23
MEMORY AND I/O ADDRESSING
.............................. 5-24
INTERRUPTS
.................................................. 5-27
Divide Error
................................................ 5-31
Single-Step
................................................. 5-31
Non-Maskable
.............................................. 5-32
Fixed Vector Instruction
...................................... 5-32
Overflow
................................................... 5-32
Check Index
................................................ 5-33
Variable Vector Instruction
................................... 5-33
Emulation Mode
............................................ 5-33
8080 EMULATION
............................................. 5-34
5-1