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2 4004 - 8085 processors
2.1 Introduction
2.2 Intel i4004 processor
Identification
Model name:
i4004.
Supplier:
Intel.
Component class:
CPU.
Architecture
4 bit data bus.
12 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).
Physics
Manufacturing technology:
PMOS.
Number of transistors: 2250.
Die size: 24 mm2.
Packaging: 16 pin CerDIP.
Dates
First microprocessor ever built.
2.3 Intel i4040 processor
Identification
Model name:
i4040.
Supplier:
Intel.
Component class:
CPU.
Compatibility
Intel i4004 CPU with extra features:
- more instructions,
- interrupt support.
Architecture
4 bit data bus.
12 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).
Physics
Manufacturing technology:
PMOS.
Packaging: 24 pin CerDIP.
Dates
2.4 Intel i8008 processor
Identification
Model name:
i8008.
Supplier:
Intel.
Component class:
CPU.
Architecture
8 bit data bus.
14 bit address bus (multiplexed).
Separate address space for instructions and data (Harvard architecture).
Clock speed
| Clock speed |
|---|
| 300 kHz |
Physics
Manufacturing technology:
PMOS.
Number of transistors: 3300.
Packaging: 18 pin CerDIP.
Dates
Introduction date: April 1972.
2.5 Intel i8080/i8080A processor
Identification
Model name:
i8080/i8080A.
Supplier:
Intel.
Component class:
CPU.
Generation
Generation: 8080.
Compatibility
Intel i8008 CPU with stack.
Architecture
8 bit data bus.
16 bit address bus.
Separate address space for instructions and data (Harvard architecture).
Clock speed
| Model | Manufacturing technology | Number of transistors | Introduction |
|---|---|---|---|
| Intel i8080 CPU | PMOS | 4500 | 1973 |
| Intel i8080A CPU | NMOS | 4000 | 1976 |
Clock speed
| Clock speed | Model | Compatibility | Periphery | Manufacturing technology |
|---|---|---|---|---|
| 2 MHz | Intel i8080 CPU | PMOS | ||
| 2.67 MHz | Intel i8080A-2 CPU | NMOS | ||
| 3.125 MHz | Intel i8080A-1 CPU | NMOS | ||
| Intel iM8080A CPU | military (-55 - 125 °C) |
Physics
Packaging: 40 pin CerDIP.
Dates
Introduction date: April 1974.
2.6 Zilog Z80 processor
Identification
Model name:
Z80.
Supplier:
Zilog.
Component class:
CPU.
Generation
Generation: 8080.
Compatibility
Intel i8080 CPU upward instruction compatible.
Not Intel i8080 CPU pin compatible.
Clock speed
Physics
Packaging: 40 pin CerDIP.
Dates
2.7 Intel i8085A/i8085AH processor
Identification
Model name:
i8085A/i8085AH.
Supplier:
Intel.
Component class:
CPU.
Generation
Generation: 8080.
Compatibility
Intel i8080 CPU upward instruction compatible.
Extra instructions:
- SIM (Set Interrupt Mask)
- RIM (Read Interrupt Mask)
Extra interrupt lines, including NMI (Non-Maskable Interrupt).
Architecture
8 bit data bus.
16 bit address bus.
Data and address bus are multiplexed.
Separate address space for instructions and data (Harvard architecture).
Clock speed
| Clock speed | Model | Periphery | Manufacturing technology |
|---|---|---|---|
| 3 MHz | Intel i8085A | NMOS | |
| Intel iM8085A CPU | military (-55 - 125 °C) | NMOS | |
| 5 MHz | Intel i8085AH-2 CPU | HMOS | |
| 6 MHz | Intel i8085AH-1 CPU | HMOS | |
| Intel iM8085AH CPU | military (-55 - 125 °C) | HMOS |
Physics
Number of transistors: 6200.
Packaging: 40 pin CerDIP.
Dates
