The 8-bit processors

8008

• Introduced April 1, 1972
• Clock speed 500 kHz (8008-1: 800 kHz)
• 0.05 MIPS
• Bus Width 8 bits (multiplexed address/data due to limited pins)
• Enhancement load PMOS logic
• Number of Transistors 3,500 at 10 µm
• Addressable memory 16 KB
• Typical in dumb terminals, general calculators, bottling machines
• Developed in tandem with 4004
• Originally intended for use in the Datapoint 2200 terminal

8080

• Introduced April 1, 1974
• Clock Speed 2 MHz
• 0.64 MIPS
• Bus Width 8 bits data, 16 bits address
• Enhancement load NMOS logic
• Number of Transistors 6,000
• Assembly language downwards compatible with 8008.
• Addressable memory 64 KB
• Up to 10X the performance of the 8008
• Used in the Altair 8800, Traffic light controller, cruise missile
• Required six support chips versus 20 for the 8008

8085

• Introduced March 1976
• Clock speed 5 MHz
• 0.37 MIPS
• Bus Width 8 bits data, 16 bits address
• Depletion load NMOS logic
• Number of Transistors 6,500 at 3 µm
• Binary compatible downwards with the 8080.
• Used in Toledo scale. Also was used as a computer peripheral controller - modems, harddisks, etc...
• CMOS 80C85 in Mars Sojourner, Radio Shack Model 100 portable.
• High level of integration, operating for the first time on a single 5 volt power supply, from 12 volts previously. Also featured two serial I/O connection,3 maskable interrupts,1 Non-maskable,1 programmable,status,DMA.

MCS-85 Family:

• 8085-CPU
• 8155-RAM+ 3 I/O Ports+Timer "Active Low CS"
• 8156-RAM+ 3 I/O Ports+Timer "Active High CS"
• 8185-SRAM
• 8202-Dynamic RAM Controller]
• 8203-Dynamic RAM Controller
• 8205-1 Of 8 Binary Decoder
• 8206-Error Detection & Correction Unit
• 8207-DRAM Controller
• 8210-TTL To MOS Shifter & High Voltage Clock Driver
• 8212-8 Bit I/O Port
• 8216-4 Bit Parallel Bidirectional Bus Driver
• 8219-Bus Controller
• 8222-Dynamic RAM Refresh Controller
• 8226-4 Bit Parallel Bidirectional Bus Driver
• 8231-Arithmetic Processing Unit
• 8232-Floating Point Processor
• 8237-DMA Controller
• 8251-Communication Controller
• 8253-Programmable Interval Timer
• 8254-Programmable Interval Timer
• 8255-Programmable Peripheral Interface
• 8256-Multifunction Support Controller
• 8257-DMA Controller
• 8259-Programmable Interrupt Controller
• 8271-Programmable Floppy Disk Controller
• 8272-Single/Double Density Floppy Disk Controller
• 8273-Programmable HDLC/SDLC Protocol Controller
• 8274-Multi-Protocol Serial Controller
• 8275-CRT Controller
• 8276-Small System CRT Controller
• 8278-Programmable KeyBoard Interface
• 8279-KeyBoard/Display Controller
• 8282-8-bit Non-Inverting Latch with Output Buffer
• 8283-8-bit Inverting Latch with Output Buffer
• 8291-GPIB Talker/Listener
• 8292-GPIB Controller
• 8293-GPIB Transceiver
• 8294-Data Encryption/Decryption Unit+1 O/P Port
• 8295-Dot Matrix Printer Controller
• 8296-GPIB Transceiver
• 8297-GPIB Transceiver
• 8355-16,384-bit (2048 x 8) ROM with I/O
• 8604-4096-bit (512 x 8) PROM
• 8702-2K-bit (256 x 8 ) PROM
• 8755-EPROM+2 I/O Ports