HP-75
The HP-75C and HP-75D were the first pocket calculators from Hewlett-Packard that could be programmed in BASIC . The HP-75C was sold from 1982, followed in 1984 by the HP-75D, which had been expanded to include a connection option for an optical barcode reader. Production ended in 1986.
properties
The HP-75 has a single-line LC display , 48 KiB ROM and 16 KiB RAM, a manually operated magnetic card reader and a built-in HP-IL interface for controlling mass storage devices. A text editor was built in as well as alarm functions to remind you of appointments or the like. The comparatively high price of $ 995 (HP-75D: $ 1095), however, prevented widespread use.
history
The HP-75 is a CMOS further development of the HP 80 series . All discrete individual chipsets including the Capricorn CPU have been newly implemented in CMOS technology. Accordingly, the BASIC operating system was also very comparable to that of the 80 series. The BASIC and the editor, however, were adapted to the single-line display and optimized and expanded for it. All devices that could be connected to the Series 80 could also be used with the HP-75 via the HP-IL interface and an optionally connected HP-IL / HP-IB converter. The concept of BASIC expansion using plug-in ROMs was implemented in the same way as for the 80 series.