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MCS-80

The original 8080 had an issue that prevented it from working with external TTL components as intended. This was fixed with the introduction of the "A" versions.

PartFrequencyDescriptionPhoto
8080500 kHz - 2.08 MHzMPU, Original, has compatibility issues with TTLC8080 N1602_1.jpg
8080A-1500 kHz - 3.12 MHzMPU
8080A-2500 kHz - 2.63 MHzMPU
8224
clock generator & driver
8801
clock generator crystal
8228
system controller & bus driver
8238
system controller & bus driver
8257
Programmable DMA Controller
8259
Programmable Interrupt Controller
8279
Programmable Keyboard/Display Controller
8271
Programmable Floppy Disk Controller
8222
Dynamic RAM Refresh Controller
8205
1 Of 8 Binary Decoder
8210
TTL To MOS Shifter & High Voltage Clock Driver
8212
8 Bit I/O Port
8214
Priority Interrupt Control Unit
8216
4 Bit Parallel Bidirectional Bus Driver
8251A
Improved Programmable Communication Interface
8253
Programmable Interval Timer
8255
Programmable Peripheral Interface
8255A
Improved Programmable Peripheral Interface

Military Specs

The following are military specs versions.

PartFrequencyDescription
M8080A500 kHz - 2.08 MHzMPU
M8224
clock generator & driver
M8228
system controller & bus driver
M8238
system controller & bus driver

Memory

Additional memory components that was used with the MCS-80

PartSizeDescription
87081024x8 bitEPROM
27162048x8 bitEPROM (pin compatible with 2316E ROM)
83081024x8 bitMOS ROM (pin compatible with 8708 PROM)
8316A2048x8 bitMOS RAM
2316E2048x8 bitROM
21141024x4 bitSRAM
211616384x1 bitDRAM