Intel’s 8085 : some facts

• Introduced in March 1976

• Clock rate 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, printers, 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 serial I/O,3 maskable interrupts,1 Non-maskable interrupt,1 externally expandable interrupt w/[8259],status,DMA.