The HP-85 personal computer was a totally self-contained, portable system for the technical professional or the beginning small-computer user. The HP-85 was based on an 8-bit microprocessor and combined an alphanumeric keyboard, CRT screen, thermal printer tape drive unit, user read/write memory and a ROM operating system in one portable package. It had 32K ROM and 16K RAM.
what is cool about this machine is that its capabilities are integrated into one unit. the screen is a 5" monochrome crt with 16 scrollable lines of 32 characters. the thermal printer works well and the tape drive provides off line storage of programs onto dc-100 cartridges and the convenient means to load up programs from the many application libraries. all this, and a very well constructed case and quality keyboard, make the machine highly usable. even today, it can impress in certain respects.
the implementation of basic is very good and has many worthwhile enhancements. as well as the aforementioned numerical capabilities, the language has a lot of useful stuff; on...goto print using, versatile string manipulation, arrays, function definitions, a timer and the ability to beep with different tones and durations. the display acts like a screen editor where you can move the cursor over anything, like a line of program, and edit it. this feature avoids much pointless re-typing. the display can also be scrolled back so that 48 lines history are preserved.
advanced for the time, is the ability to use the screen as a pixel addressed graphic display. particularly impressive is the built-in commands to assist plotting, drawing lines, scaling and graphical axes. indeed, by providing a scale and origin, there is no need to plot in terms of the raw pixel coordinates. your program can work in its relevant domain. graphical x & y axes use this too and the xaxis and yaxis commands work superbly. the graphical screen can be copied to the printer as required and this is great for hardcopy graphs and stats which are printed sideways in order to take advantage of the paper dimensions.
the base unit has 16k of ram and a 32k rom. there are 4 expansion ports on the back that can accommodate more memory (another 16k for this model) and a multitude of optional peripherals like rs232, disk controllers, a modem and additional roms.
All manuals in this page are taken from www.series80.org
Shipment cost is not available in the website and will have to be calculated based on destination.