DATAMATH PICTURES

This HP-80 Financial Calculator was manufactured in November 1972 by
Hewlett Packard in the United States (Date code 1247A » wk 47 yr 1972).

The HP-80 is powered by 3 AA-sized rechargeable batteries.

The Main printed circuit board (PCB) of the featured HP-80 is centered around the HP 1818-0078 Control and Timing Chip and the
HP 1820-0848 Arithmetic and Register Chip in white ceramic packages and seven ROM Chips with a capacity
of 256*10 bits, each mounted in a ceramic hybrid package and supported by a HP Clock Driver and power supply.

The Display and Keyboard PCB of the HP-80 with two display drivers and three
7-segment LED-Display Modules with 5 digits, each.

Close-up view of the HP 1820-0848 Arithmetic and Register Chip, here manufactured by AMI.

Close-up view of the HP 1818-0078 Control and Timing Chip, here manufactured by Mostek and marked as MK6021P.

Close-up view of the hybrid package with its seven ROMs bonded directly on a ceramic substrate and protected with a metal lid.

Close-up view of the HP 1820-1127 Clock Driver Chip.

Close-up view of three HP 1990-0335 5-digit 7-Segment LED Modules .

Close-up view of the HP 1820-1029 Anode Driver and System Clock Chip.

Close-up view of the HP 1820-1061 Display Scanning and Cathode Driver Chip.