NationalSemi > NatSemiINS8080AN

Modified: May 30, 2005, 6:24 pm

Manufacturer:	National Semiconductor
Model:	INS8080AN
Speed:	2 Mhz
Type:	8080
Data Code:	8652
Introduced:	1974
Transistors:	4500
Package:	40PDIP
Process:	3 Micron
Architecture:	8 bit
Used in:	Altair 8800, IMSAI 8080, CompuColor II, Byte Computers Byt-8 and controllers
Description:	Intel 8080 microprocessor is a successor to the Intel 8008 CPU. To ease transition to the 8080 Intel made the new microprocessor source code compatible with the 8008. Interrupt processing logic didn't change from the 8008, which also helped to port old software to the 8080 processor. The 8080 processor included many enhancements: Maximum memory size was expanded to 64 KB. Stack size was no longer limited to 7 levels. The number of I/O ports was increased to 256. The processor included many new instructions and direct addressing mode.